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1219 lines
32 KiB
1219 lines
32 KiB
// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package promql
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import (
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"fmt"
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"math"
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"reflect"
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"strings"
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"testing"
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"time"
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/storage/metric"
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)
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var testExpr = []struct {
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input string // The input to be parsed.
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expected Expr // The expected expression AST.
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fail bool // Whether parsing is supposed to fail.
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errMsg string // If not empty the parsing error has to contain this string.
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}{
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// Scalars and scalar-to-scalar operations.
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{
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input: "1",
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expected: &NumberLiteral{1},
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}, {
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input: "+Inf",
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expected: &NumberLiteral{clientmodel.SampleValue(math.Inf(1))},
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}, {
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input: "-Inf",
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expected: &NumberLiteral{clientmodel.SampleValue(math.Inf(-1))},
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}, {
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input: ".5",
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expected: &NumberLiteral{0.5},
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}, {
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input: "5.",
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expected: &NumberLiteral{5},
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}, {
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input: "123.4567",
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expected: &NumberLiteral{123.4567},
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}, {
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input: "5e-3",
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expected: &NumberLiteral{0.005},
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}, {
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input: "5e3",
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expected: &NumberLiteral{5000},
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}, {
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input: "0xc",
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expected: &NumberLiteral{12},
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}, {
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input: "0755",
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expected: &NumberLiteral{493},
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}, {
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input: "+5.5e-3",
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expected: &NumberLiteral{0.0055},
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}, {
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input: "-0755",
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expected: &NumberLiteral{-493},
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}, {
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input: "1 + 1",
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expected: &BinaryExpr{itemADD, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 - 1",
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expected: &BinaryExpr{itemSUB, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 * 1",
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expected: &BinaryExpr{itemMUL, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 % 1",
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expected: &BinaryExpr{itemMOD, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 / 1",
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expected: &BinaryExpr{itemDIV, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 == 1",
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expected: &BinaryExpr{itemEQL, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 != 1",
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expected: &BinaryExpr{itemNEQ, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 > 1",
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expected: &BinaryExpr{itemGTR, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 >= 1",
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expected: &BinaryExpr{itemGTE, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 < 1",
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expected: &BinaryExpr{itemLSS, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "1 <= 1",
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expected: &BinaryExpr{itemLTE, &NumberLiteral{1}, &NumberLiteral{1}, nil},
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}, {
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input: "+1 + -2 * 1",
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expected: &BinaryExpr{
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Op: itemADD,
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LHS: &NumberLiteral{1},
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RHS: &BinaryExpr{
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Op: itemMUL, LHS: &NumberLiteral{-2}, RHS: &NumberLiteral{1},
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},
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},
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}, {
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input: "1 + 2/(3*1)",
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expected: &BinaryExpr{
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Op: itemADD,
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LHS: &NumberLiteral{1},
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RHS: &BinaryExpr{
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Op: itemDIV,
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LHS: &NumberLiteral{2},
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RHS: &ParenExpr{&BinaryExpr{
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Op: itemMUL, LHS: &NumberLiteral{3}, RHS: &NumberLiteral{1},
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}},
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},
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},
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}, {
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input: "",
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fail: true,
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errMsg: "no expression found in input",
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}, {
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input: "# just a comment\n\n",
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fail: true,
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errMsg: "no expression found in input",
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}, {
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input: "1+",
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fail: true,
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errMsg: "missing right-hand side in binary expression",
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}, {
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input: ".",
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fail: true,
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errMsg: "unexpected character: '.'",
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}, {
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input: "2.5.",
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fail: true,
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errMsg: "could not parse remaining input \".\"...",
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}, {
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input: "100..4",
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fail: true,
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errMsg: "could not parse remaining input \".4\"...",
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}, {
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input: "0deadbeef",
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fail: true,
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errMsg: "bad number or duration syntax: \"0de\"",
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}, {
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input: "1 /",
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fail: true,
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errMsg: "missing right-hand side in binary expression",
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}, {
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input: "*1",
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fail: true,
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errMsg: "no valid expression found",
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}, {
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input: "(1))",
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fail: true,
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errMsg: "could not parse remaining input \")\"...",
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}, {
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input: "((1)",
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fail: true,
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errMsg: "unclosed left parenthesis",
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}, {
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input: "(",
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fail: true,
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errMsg: "unclosed left parenthesis",
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}, {
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input: "1 and 1",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "1 or 1",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "1 !~ 1",
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fail: true,
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errMsg: "could not parse remaining input \"!~ 1\"...",
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}, {
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input: "1 =~ 1",
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fail: true,
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errMsg: "could not parse remaining input \"=~ 1\"...",
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}, {
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input: "-some_metric",
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fail: true,
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errMsg: "expected type scalar in unary expression, got vector",
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}, {
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input: `-"string"`,
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fail: true,
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errMsg: "expected type scalar in unary expression, got string",
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},
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// Vector binary operations.
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{
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input: "foo * bar",
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expected: &BinaryExpr{
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Op: itemMUL,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{Card: CardOneToOne},
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},
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}, {
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input: "foo == 1",
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expected: &BinaryExpr{
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Op: itemEQL,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &NumberLiteral{1},
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},
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}, {
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input: "2.5 / bar",
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expected: &BinaryExpr{
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Op: itemDIV,
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LHS: &NumberLiteral{2.5},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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},
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}, {
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input: "foo and bar",
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expected: &BinaryExpr{
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Op: itemLAND,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{Card: CardManyToMany},
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},
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}, {
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input: "foo or bar",
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expected: &BinaryExpr{
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Op: itemLOR,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{Card: CardManyToMany},
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},
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}, {
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// Test and/or precedence and reassigning of operands.
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input: "foo + bar or bla and blub",
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expected: &BinaryExpr{
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Op: itemLOR,
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LHS: &BinaryExpr{
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Op: itemADD,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{Card: CardOneToOne},
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},
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RHS: &BinaryExpr{
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Op: itemLAND,
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LHS: &VectorSelector{
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Name: "bla",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bla"},
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},
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},
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RHS: &VectorSelector{
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Name: "blub",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "blub"},
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},
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},
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VectorMatching: &VectorMatching{Card: CardManyToMany},
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},
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VectorMatching: &VectorMatching{Card: CardManyToMany},
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},
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}, {
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// Test precedence and reassigning of operands.
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input: "bar + on(foo) bla / on(baz, buz) group_right(test) blub",
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expected: &BinaryExpr{
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Op: itemADD,
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LHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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RHS: &BinaryExpr{
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Op: itemDIV,
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LHS: &VectorSelector{
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Name: "bla",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bla"},
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},
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},
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RHS: &VectorSelector{
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Name: "blub",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "blub"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardOneToMany,
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On: clientmodel.LabelNames{"baz", "buz"},
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Include: clientmodel.LabelNames{"test"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardOneToOne,
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On: clientmodel.LabelNames{"foo"},
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},
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},
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}, {
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input: "foo * on(test,blub) bar",
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expected: &BinaryExpr{
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Op: itemMUL,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardOneToOne,
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On: clientmodel.LabelNames{"test", "blub"},
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},
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},
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}, {
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input: "foo and on(test,blub) bar",
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expected: &BinaryExpr{
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Op: itemLAND,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardManyToMany,
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On: clientmodel.LabelNames{"test", "blub"},
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},
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},
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}, {
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input: "foo / on(test,blub) group_left(bar) bar",
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expected: &BinaryExpr{
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Op: itemDIV,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardManyToOne,
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On: clientmodel.LabelNames{"test", "blub"},
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Include: clientmodel.LabelNames{"bar"},
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},
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},
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}, {
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input: "foo - on(test,blub) group_right(bar,foo) bar",
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expected: &BinaryExpr{
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Op: itemSUB,
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LHS: &VectorSelector{
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Name: "foo",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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RHS: &VectorSelector{
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Name: "bar",
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
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},
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},
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VectorMatching: &VectorMatching{
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Card: CardOneToMany,
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On: clientmodel.LabelNames{"test", "blub"},
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Include: clientmodel.LabelNames{"bar", "foo"},
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},
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},
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}, {
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input: "foo and 1",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "1 and foo",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "foo or 1",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "1 or foo",
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fail: true,
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errMsg: "AND and OR not allowed in binary scalar expression",
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}, {
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input: "1 or on(bar) foo",
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fail: true,
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|
errMsg: "vector matching only allowed between vectors",
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}, {
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input: "foo == on(bar) 10",
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fail: true,
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|
errMsg: "vector matching only allowed between vectors",
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}, {
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input: "foo and on(bar) group_left(baz) bar",
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fail: true,
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|
errMsg: "no grouping allowed for AND and OR operations",
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|
}, {
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|
input: "foo and on(bar) group_right(baz) bar",
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fail: true,
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|
errMsg: "no grouping allowed for AND and OR operations",
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}, {
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|
input: "foo or on(bar) group_left(baz) bar",
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|
fail: true,
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|
errMsg: "no grouping allowed for AND and OR operations",
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|
}, {
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|
input: "foo or on(bar) group_right(baz) bar",
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|
fail: true,
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|
errMsg: "no grouping allowed for AND and OR operations",
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},
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// Test vector selector.
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{
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input: "foo",
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expected: &VectorSelector{
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Name: "foo",
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Offset: 0,
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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|
},
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|
}, {
|
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input: "foo offset 5m",
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expected: &VectorSelector{
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Name: "foo",
|
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Offset: 5 * time.Minute,
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|
LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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|
},
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|
}, {
|
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input: `foo:bar{a="b"}`,
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expected: &VectorSelector{
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Name: "foo:bar",
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Offset: 0,
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: "a", Value: "b"},
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo:bar"},
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},
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},
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|
}, {
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input: `foo{NaN='b'}`,
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expected: &VectorSelector{
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Name: "foo",
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Offset: 0,
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: "NaN", Value: "b"},
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{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
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},
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},
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|
}, {
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input: `foo{a="b", foo!="bar", test=~"test", bar!~"baz"}`,
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|
expected: &VectorSelector{
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Name: "foo",
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Offset: 0,
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LabelMatchers: metric.LabelMatchers{
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{Type: metric.Equal, Name: "a", Value: "b"},
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{Type: metric.NotEqual, Name: "foo", Value: "bar"},
|
|
mustLabelMatcher(metric.RegexMatch, "test", "test"),
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|
mustLabelMatcher(metric.RegexNoMatch, "bar", "baz"),
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
|
|
},
|
|
},
|
|
}, {
|
|
input: `{`,
|
|
fail: true,
|
|
errMsg: "unexpected end of input inside braces",
|
|
}, {
|
|
input: `}`,
|
|
fail: true,
|
|
errMsg: "unexpected character: '}'",
|
|
}, {
|
|
input: `some{`,
|
|
fail: true,
|
|
errMsg: "unexpected end of input inside braces",
|
|
}, {
|
|
input: `some}`,
|
|
fail: true,
|
|
errMsg: "could not parse remaining input \"}\"...",
|
|
}, {
|
|
input: `some_metric{a=b}`,
|
|
fail: true,
|
|
errMsg: "unexpected identifier \"b\" in label matching, expected string",
|
|
}, {
|
|
input: `some_metric{a:b="b"}`,
|
|
fail: true,
|
|
errMsg: "unexpected character inside braces: ':'",
|
|
}, {
|
|
input: `foo{a*"b"}`,
|
|
fail: true,
|
|
errMsg: "unexpected character inside braces: '*'",
|
|
}, {
|
|
input: `foo{a>="b"}`,
|
|
fail: true,
|
|
// TODO(fabxc): willingly lexing wrong tokens allows for more precrise error
|
|
// messages from the parser - consider if this is an option.
|
|
errMsg: "unexpected character inside braces: '>'",
|
|
}, {
|
|
input: `foo{gibberish}`,
|
|
fail: true,
|
|
errMsg: "expected label matching operator but got }",
|
|
}, {
|
|
input: `foo{1}`,
|
|
fail: true,
|
|
errMsg: "unexpected character inside braces: '1'",
|
|
}, {
|
|
input: `{}`,
|
|
fail: true,
|
|
errMsg: "vector selector must contain label matchers or metric name",
|
|
}, {
|
|
input: `foo{__name__="bar"}`,
|
|
fail: true,
|
|
errMsg: "metric name must not be set twice: \"foo\" or \"bar\"",
|
|
// }, {
|
|
// input: `:foo`,
|
|
// fail: true,
|
|
// errMsg: "bla",
|
|
},
|
|
// Test matrix selector.
|
|
{
|
|
input: "test[5s]",
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 0,
|
|
Range: 5 * time.Second,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: "test[5m]",
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 0,
|
|
Range: 5 * time.Minute,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: "test[5h] OFFSET 5m",
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 5 * time.Minute,
|
|
Range: 5 * time.Hour,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: "test[5d] OFFSET 10s",
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 10 * time.Second,
|
|
Range: 5 * 24 * time.Hour,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: "test[5w] offset 2w",
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 14 * 24 * time.Hour,
|
|
Range: 5 * 7 * 24 * time.Hour,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: `test{a="b"}[5y] OFFSET 3d`,
|
|
expected: &MatrixSelector{
|
|
Name: "test",
|
|
Offset: 3 * 24 * time.Hour,
|
|
Range: 5 * 365 * 24 * time.Hour,
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: "a", Value: "b"},
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
|
|
},
|
|
},
|
|
}, {
|
|
input: `foo[5mm]`,
|
|
fail: true,
|
|
errMsg: "bad duration syntax: \"5mm\"",
|
|
}, {
|
|
input: `foo[0m]`,
|
|
fail: true,
|
|
errMsg: "duration must be greater than 0",
|
|
}, {
|
|
input: `foo[5m30s]`,
|
|
fail: true,
|
|
errMsg: "bad duration syntax: \"5m3\"",
|
|
}, {
|
|
input: `foo[5m] OFFSET 1h30m`,
|
|
fail: true,
|
|
errMsg: "bad number or duration syntax: \"1h3\"",
|
|
}, {
|
|
input: `foo[]`,
|
|
fail: true,
|
|
errMsg: "missing unit character in duration",
|
|
}, {
|
|
input: `foo[1]`,
|
|
fail: true,
|
|
errMsg: "missing unit character in duration",
|
|
}, {
|
|
input: `some_metric[5m] OFFSET 1`,
|
|
fail: true,
|
|
errMsg: "unexpected number \"1\" in matrix selector, expected duration",
|
|
}, {
|
|
input: `some_metric[5m] OFFSET 1mm`,
|
|
fail: true,
|
|
errMsg: "bad number or duration syntax: \"1mm\"",
|
|
}, {
|
|
input: `some_metric[5m] OFFSET`,
|
|
fail: true,
|
|
errMsg: "unexpected end of input in matrix selector, expected duration",
|
|
}, {
|
|
input: `(foo + bar)[5m]`,
|
|
fail: true,
|
|
errMsg: "could not parse remaining input \"[5m]\"...",
|
|
},
|
|
// Test aggregation.
|
|
{
|
|
input: "sum by (foo)(some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemSum,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
},
|
|
}, {
|
|
input: "sum by (foo) keeping_extra (some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemSum,
|
|
KeepExtraLabels: true,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
},
|
|
}, {
|
|
input: "sum (some_metric) by (foo,bar) keeping_extra",
|
|
expected: &AggregateExpr{
|
|
Op: itemSum,
|
|
KeepExtraLabels: true,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo", "bar"},
|
|
},
|
|
}, {
|
|
input: "avg by (foo)(some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemAvg,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
},
|
|
}, {
|
|
input: "COUNT by (foo) keeping_extra (some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemCount,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
KeepExtraLabels: true,
|
|
},
|
|
}, {
|
|
input: "MIN (some_metric) by (foo) keeping_extra",
|
|
expected: &AggregateExpr{
|
|
Op: itemMin,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
KeepExtraLabels: true,
|
|
},
|
|
}, {
|
|
input: "max by (foo)(some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemMax,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
},
|
|
}, {
|
|
input: "stddev(some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemStddev,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
},
|
|
}, {
|
|
input: "stdvar by (foo)(some_metric)",
|
|
expected: &AggregateExpr{
|
|
Op: itemStdvar,
|
|
Expr: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
Grouping: clientmodel.LabelNames{"foo"},
|
|
},
|
|
}, {
|
|
input: `sum some_metric by (test)`,
|
|
fail: true,
|
|
errMsg: "unexpected identifier \"some_metric\" in aggregation, expected \"(\"",
|
|
}, {
|
|
input: `sum (some_metric) by test`,
|
|
fail: true,
|
|
errMsg: "unexpected identifier \"test\" in grouping opts, expected \"(\"",
|
|
}, {
|
|
input: `sum (some_metric) by ()`,
|
|
fail: true,
|
|
errMsg: "unexpected \")\" in grouping opts, expected identifier",
|
|
}, {
|
|
input: `sum (some_metric) by test`,
|
|
fail: true,
|
|
errMsg: "unexpected identifier \"test\" in grouping opts, expected \"(\"",
|
|
}, {
|
|
input: `some_metric[5m] OFFSET`,
|
|
fail: true,
|
|
errMsg: "unexpected end of input in matrix selector, expected duration",
|
|
}, {
|
|
input: `sum () by (test)`,
|
|
fail: true,
|
|
errMsg: "no valid expression found",
|
|
}, {
|
|
input: "MIN keeping_extra (some_metric) by (foo)",
|
|
fail: true,
|
|
errMsg: "could not parse remaining input \"by (foo)\"...",
|
|
}, {
|
|
input: "MIN by(test) (some_metric) keeping_extra",
|
|
fail: true,
|
|
errMsg: "could not parse remaining input \"keeping_extra\"...",
|
|
},
|
|
// Test function calls.
|
|
{
|
|
input: "time()",
|
|
expected: &Call{
|
|
Func: mustGetFunction("time"),
|
|
},
|
|
}, {
|
|
input: `floor(some_metric{foo!="bar"})`,
|
|
expected: &Call{
|
|
Func: mustGetFunction("floor"),
|
|
Args: Expressions{
|
|
&VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.NotEqual, Name: "foo", Value: "bar"},
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}, {
|
|
input: "rate(some_metric[5m])",
|
|
expected: &Call{
|
|
Func: mustGetFunction("rate"),
|
|
Args: Expressions{
|
|
&MatrixSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
Range: 5 * time.Minute,
|
|
},
|
|
},
|
|
},
|
|
}, {
|
|
input: "round(some_metric)",
|
|
expected: &Call{
|
|
Func: mustGetFunction("round"),
|
|
Args: Expressions{
|
|
&VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}, {
|
|
input: "round(some_metric, 5)",
|
|
expected: &Call{
|
|
Func: mustGetFunction("round"),
|
|
Args: Expressions{
|
|
&VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
&NumberLiteral{5},
|
|
},
|
|
},
|
|
}, {
|
|
input: "floor()",
|
|
fail: true,
|
|
errMsg: "expected at least 1 argument(s) in call to \"floor\", got 0",
|
|
}, {
|
|
input: "floor(some_metric, other_metric)",
|
|
fail: true,
|
|
errMsg: "expected at most 1 argument(s) in call to \"floor\", got 2",
|
|
}, {
|
|
input: "floor(1)",
|
|
fail: true,
|
|
errMsg: "expected type vector in call to function \"floor\", got scalar",
|
|
}, {
|
|
input: "non_existant_function_far_bar()",
|
|
fail: true,
|
|
errMsg: "unknown function with name \"non_existant_function_far_bar\"",
|
|
}, {
|
|
input: "rate(some_metric)",
|
|
fail: true,
|
|
errMsg: "expected type matrix in call to function \"rate\", got vector",
|
|
},
|
|
}
|
|
|
|
func TestParseExpressions(t *testing.T) {
|
|
for _, test := range testExpr {
|
|
parser := newParser(test.input)
|
|
|
|
expr, err := parser.parseExpr()
|
|
if !test.fail && err != nil {
|
|
t.Errorf("error in input '%s'", test.input)
|
|
t.Fatalf("could not parse: %s", err)
|
|
}
|
|
if test.fail && err != nil {
|
|
if !strings.Contains(err.Error(), test.errMsg) {
|
|
t.Errorf("unexpected error on input '%s'", test.input)
|
|
t.Fatalf("expected error to contain %q but got %q", test.errMsg, err)
|
|
}
|
|
continue
|
|
}
|
|
|
|
err = parser.typecheck(expr)
|
|
if !test.fail && err != nil {
|
|
t.Errorf("error on input '%s'", test.input)
|
|
t.Fatalf("typecheck failed: %s", err)
|
|
}
|
|
|
|
if test.fail {
|
|
if err != nil {
|
|
if !strings.Contains(err.Error(), test.errMsg) {
|
|
t.Errorf("unexpected error on input '%s'", test.input)
|
|
t.Fatalf("expected error to contain %q but got %q", test.errMsg, err)
|
|
}
|
|
continue
|
|
}
|
|
t.Errorf("error on input '%s'", test.input)
|
|
t.Fatalf("failure expected, but passed with result: %q", expr)
|
|
}
|
|
|
|
if !reflect.DeepEqual(expr, test.expected) {
|
|
t.Errorf("error on input '%s'", test.input)
|
|
t.Fatalf("no match\n\nexpected:\n%s\ngot: \n%s\n", Tree(test.expected), Tree(expr))
|
|
}
|
|
}
|
|
}
|
|
|
|
// NaN has no equality. Thus, we need a separate test for it.
|
|
func TestNaNExpression(t *testing.T) {
|
|
parser := newParser("NaN")
|
|
|
|
expr, err := parser.parseExpr()
|
|
if err != nil {
|
|
t.Errorf("error on input 'NaN'")
|
|
t.Fatalf("coud not parse: %s", err)
|
|
}
|
|
|
|
nl, ok := expr.(*NumberLiteral)
|
|
if !ok {
|
|
t.Errorf("error on input 'NaN'")
|
|
t.Fatalf("expected number literal but got %T", expr)
|
|
}
|
|
|
|
if !math.IsNaN(float64(nl.Val)) {
|
|
t.Errorf("error on input 'NaN'")
|
|
t.Fatalf("expected 'NaN' in number literal but got %d", nl.Val)
|
|
}
|
|
}
|
|
|
|
var testStatement = []struct {
|
|
input string
|
|
expected Statements
|
|
fail bool
|
|
}{
|
|
{
|
|
// Test a file-like input.
|
|
input: `
|
|
# A simple test recording rule.
|
|
dc:http_request:rate5m = sum(rate(http_request_count[5m])) by (dc)
|
|
|
|
# A simple test alerting rule.
|
|
ALERT GlobalRequestRateLow IF(dc:http_request:rate5m < 10000) FOR 5m WITH {
|
|
service = "testservice"
|
|
# ... more fields here ...
|
|
}
|
|
SUMMARY "Global request rate low"
|
|
DESCRIPTION "The global request rate is low"
|
|
|
|
foo = bar{label1="value1"}
|
|
|
|
ALERT BazAlert IF foo > 10 WITH {}
|
|
SUMMARY "Baz"
|
|
DESCRIPTION "BazAlert"
|
|
`,
|
|
expected: Statements{
|
|
&RecordStmt{
|
|
Name: "dc:http_request:rate5m",
|
|
Expr: &AggregateExpr{
|
|
Op: itemSum,
|
|
Grouping: clientmodel.LabelNames{"dc"},
|
|
Expr: &Call{
|
|
Func: mustGetFunction("rate"),
|
|
Args: Expressions{
|
|
&MatrixSelector{
|
|
Name: "http_request_count",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "http_request_count"},
|
|
},
|
|
Range: 5 * time.Minute,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
Labels: nil,
|
|
},
|
|
&AlertStmt{
|
|
Name: "GlobalRequestRateLow",
|
|
Expr: &ParenExpr{&BinaryExpr{
|
|
Op: itemLSS,
|
|
LHS: &VectorSelector{
|
|
Name: "dc:http_request:rate5m",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "dc:http_request:rate5m"},
|
|
},
|
|
},
|
|
RHS: &NumberLiteral{10000},
|
|
}},
|
|
Labels: clientmodel.LabelSet{"service": "testservice"},
|
|
Duration: 5 * time.Minute,
|
|
Summary: "Global request rate low",
|
|
Description: "The global request rate is low",
|
|
},
|
|
&RecordStmt{
|
|
Name: "foo",
|
|
Expr: &VectorSelector{
|
|
Name: "bar",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: "label1", Value: "value1"},
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
|
|
},
|
|
},
|
|
Labels: nil,
|
|
},
|
|
&AlertStmt{
|
|
Name: "BazAlert",
|
|
Expr: &BinaryExpr{
|
|
Op: itemGTR,
|
|
LHS: &VectorSelector{
|
|
Name: "foo",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
|
|
},
|
|
},
|
|
RHS: &NumberLiteral{10},
|
|
},
|
|
Labels: clientmodel.LabelSet{},
|
|
Summary: "Baz",
|
|
Description: "BazAlert",
|
|
},
|
|
},
|
|
}, {
|
|
input: `foo{x="", a="z"} = bar{a="b", x=~"y"}`,
|
|
expected: Statements{
|
|
&RecordStmt{
|
|
Name: "foo",
|
|
Expr: &VectorSelector{
|
|
Name: "bar",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: "a", Value: "b"},
|
|
mustLabelMatcher(metric.RegexMatch, "x", "y"),
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
|
|
},
|
|
},
|
|
Labels: clientmodel.LabelSet{"x": "", "a": "z"},
|
|
},
|
|
},
|
|
}, {
|
|
input: `ALERT SomeName IF some_metric > 1
|
|
SUMMARY "Global request rate low"
|
|
DESCRIPTION "The global request rate is low"
|
|
`,
|
|
expected: Statements{
|
|
&AlertStmt{
|
|
Name: "SomeName",
|
|
Expr: &BinaryExpr{
|
|
Op: itemGTR,
|
|
LHS: &VectorSelector{
|
|
Name: "some_metric",
|
|
LabelMatchers: metric.LabelMatchers{
|
|
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
|
|
},
|
|
},
|
|
RHS: &NumberLiteral{1},
|
|
},
|
|
Labels: clientmodel.LabelSet{},
|
|
Summary: "Global request rate low",
|
|
Description: "The global request rate is low",
|
|
},
|
|
},
|
|
}, {
|
|
input: `
|
|
# A simple test alerting rule.
|
|
ALERT GlobalRequestRateLow IF(dc:http_request:rate5m < 10000) FOR 5 WITH {
|
|
service = "testservice"
|
|
# ... more fields here ...
|
|
}
|
|
SUMMARY "Global request rate low"
|
|
DESCRIPTION "The global request rate is low"
|
|
`,
|
|
fail: true,
|
|
}, {
|
|
input: "",
|
|
expected: Statements{},
|
|
}, {
|
|
input: "foo = time()",
|
|
fail: true,
|
|
}, {
|
|
input: "foo = 1",
|
|
fail: true,
|
|
}, {
|
|
input: "foo = bar[5m]",
|
|
fail: true,
|
|
}, {
|
|
input: `foo = "test"`,
|
|
fail: true,
|
|
}, {
|
|
input: `foo = `,
|
|
fail: true,
|
|
}, {
|
|
input: `foo{a!="b"} = bar`,
|
|
fail: true,
|
|
}, {
|
|
input: `foo{a=~"b"} = bar`,
|
|
fail: true,
|
|
}, {
|
|
input: `foo{a!~"b"} = bar`,
|
|
fail: true,
|
|
}, {
|
|
input: `ALERT SomeName IF time() WITH {}
|
|
SUMMARY "Global request rate low"
|
|
DESCRIPTION "The global request rate is low"
|
|
`,
|
|
fail: true,
|
|
}, {
|
|
input: `ALERT SomeName IF some_metric > 1 WITH {}
|
|
SUMMARY "Global request rate low"
|
|
`,
|
|
fail: true,
|
|
}, {
|
|
input: `ALERT SomeName IF some_metric > 1
|
|
DESCRIPTION "The global request rate is low"
|
|
`,
|
|
fail: true,
|
|
},
|
|
}
|
|
|
|
func TestParseStatements(t *testing.T) {
|
|
for _, test := range testStatement {
|
|
parser := newParser(test.input)
|
|
|
|
stmts, err := parser.parseStmts()
|
|
if !test.fail && err != nil {
|
|
t.Errorf("error in input: \n\n%s\n", test.input)
|
|
t.Fatalf("could not parse: %s", err)
|
|
}
|
|
if test.fail && err != nil {
|
|
continue
|
|
}
|
|
|
|
err = parser.typecheck(stmts)
|
|
if !test.fail && err != nil {
|
|
t.Errorf("error in input: \n\n%s\n", test.input)
|
|
t.Fatalf("typecheck failed: %s", err)
|
|
}
|
|
|
|
if test.fail {
|
|
if err != nil {
|
|
continue
|
|
}
|
|
t.Errorf("error in input: \n\n%s\n", test.input)
|
|
t.Fatalf("failure expected, but passed")
|
|
}
|
|
|
|
if !reflect.DeepEqual(stmts, test.expected) {
|
|
t.Errorf("error in input: \n\n%s\n", test.input)
|
|
t.Fatalf("no match\n\nexpected:\n%s\ngot: \n%s\n", Tree(test.expected), Tree(stmts))
|
|
}
|
|
}
|
|
}
|
|
|
|
func mustLabelMatcher(mt metric.MatchType, name clientmodel.LabelName, val clientmodel.LabelValue) *metric.LabelMatcher {
|
|
m, err := metric.NewLabelMatcher(mt, name, val)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return m
|
|
}
|
|
|
|
func mustGetFunction(name string) *Function {
|
|
f, ok := getFunction(name)
|
|
if !ok {
|
|
panic(fmt.Errorf("function %q does not exist", name))
|
|
}
|
|
return f
|
|
}
|