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711 lines
17 KiB
711 lines
17 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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"reflect" |
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"testing" |
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) |
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|
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type testCase struct { |
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input string |
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expected []item |
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fail bool |
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seriesDesc bool // Whether to lex a series description. |
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} |
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|
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var tests = []struct { |
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name string |
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tests []testCase |
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}{ |
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{ |
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name: "common", |
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tests: []testCase{ |
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{ |
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input: ",", |
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expected: []item{{itemComma, 0, ","}}, |
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}, { |
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input: "()", |
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expected: []item{{itemLeftParen, 0, `(`}, {itemRightParen, 1, `)`}}, |
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}, { |
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input: "{}", |
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expected: []item{{itemLeftBrace, 0, `{`}, {itemRightBrace, 1, `}`}}, |
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}, { |
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input: "[5m]", |
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expected: []item{ |
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{itemLeftBracket, 0, `[`}, |
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{itemDuration, 1, `5m`}, |
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{itemRightBracket, 3, `]`}, |
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}, |
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}, { |
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input: "\r\n\r", |
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expected: []item{}, |
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}, |
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}, |
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}, |
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{ |
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name: "numbers", |
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tests: []testCase{ |
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{ |
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input: "1", |
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expected: []item{{itemNumber, 0, "1"}}, |
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}, { |
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input: "4.23", |
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expected: []item{{itemNumber, 0, "4.23"}}, |
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}, { |
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input: ".3", |
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expected: []item{{itemNumber, 0, ".3"}}, |
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}, { |
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input: "5.", |
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expected: []item{{itemNumber, 0, "5."}}, |
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}, { |
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input: "NaN", |
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expected: []item{{itemNumber, 0, "NaN"}}, |
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}, { |
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input: "nAN", |
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expected: []item{{itemNumber, 0, "nAN"}}, |
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}, { |
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input: "NaN 123", |
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expected: []item{{itemNumber, 0, "NaN"}, {itemNumber, 4, "123"}}, |
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}, { |
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input: "NaN123", |
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expected: []item{{itemIdentifier, 0, "NaN123"}}, |
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}, { |
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input: "iNf", |
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expected: []item{{itemNumber, 0, "iNf"}}, |
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}, { |
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input: "Inf", |
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expected: []item{{itemNumber, 0, "Inf"}}, |
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}, { |
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input: "+Inf", |
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expected: []item{{itemADD, 0, "+"}, {itemNumber, 1, "Inf"}}, |
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}, { |
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input: "+Inf 123", |
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expected: []item{{itemADD, 0, "+"}, {itemNumber, 1, "Inf"}, {itemNumber, 5, "123"}}, |
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}, { |
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input: "-Inf", |
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expected: []item{{itemSUB, 0, "-"}, {itemNumber, 1, "Inf"}}, |
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}, { |
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input: "Infoo", |
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expected: []item{{itemIdentifier, 0, "Infoo"}}, |
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}, { |
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input: "-Infoo", |
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expected: []item{{itemSUB, 0, "-"}, {itemIdentifier, 1, "Infoo"}}, |
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}, { |
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input: "-Inf 123", |
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expected: []item{{itemSUB, 0, "-"}, {itemNumber, 1, "Inf"}, {itemNumber, 5, "123"}}, |
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}, { |
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input: "0x123", |
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expected: []item{{itemNumber, 0, "0x123"}}, |
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}, |
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}, |
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}, |
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{ |
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name: "strings", |
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tests: []testCase{ |
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{ |
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input: "\"test\\tsequence\"", |
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expected: []item{{itemString, 0, `"test\tsequence"`}}, |
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}, |
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{ |
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input: "\"test\\\\.expression\"", |
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expected: []item{{itemString, 0, `"test\\.expression"`}}, |
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}, |
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{ |
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input: "\"test\\.expression\"", |
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expected: []item{ |
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{itemError, 0, "unknown escape sequence U+002E '.'"}, |
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{itemString, 0, `"test\.expression"`}, |
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}, |
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}, |
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{ |
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input: "`test\\.expression`", |
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expected: []item{{itemString, 0, "`test\\.expression`"}}, |
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}, |
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{ |
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// See https://github.com/prometheus/prometheus/issues/939. |
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input: ".٩", |
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fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "durations", |
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tests: []testCase{ |
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{ |
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input: "5s", |
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expected: []item{{itemDuration, 0, "5s"}}, |
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}, { |
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input: "123m", |
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expected: []item{{itemDuration, 0, "123m"}}, |
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}, { |
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input: "1h", |
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expected: []item{{itemDuration, 0, "1h"}}, |
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}, { |
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input: "3w", |
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expected: []item{{itemDuration, 0, "3w"}}, |
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}, { |
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input: "1y", |
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expected: []item{{itemDuration, 0, "1y"}}, |
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}, |
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}, |
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}, |
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{ |
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name: "identifiers", |
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tests: []testCase{ |
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{ |
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input: "abc", |
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expected: []item{{itemIdentifier, 0, "abc"}}, |
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}, { |
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input: "a:bc", |
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expected: []item{{itemMetricIdentifier, 0, "a:bc"}}, |
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}, { |
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input: "abc d", |
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expected: []item{{itemIdentifier, 0, "abc"}, {itemIdentifier, 4, "d"}}, |
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}, { |
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input: ":bc", |
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expected: []item{{itemMetricIdentifier, 0, ":bc"}}, |
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}, { |
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input: "0a:bc", |
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fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "comments", |
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tests: []testCase{ |
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{ |
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input: "# some comment", |
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expected: []item{{itemComment, 0, "# some comment"}}, |
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}, { |
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input: "5 # 1+1\n5", |
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expected: []item{ |
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{itemNumber, 0, "5"}, |
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{itemComment, 2, "# 1+1"}, |
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{itemNumber, 8, "5"}, |
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}, |
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}, |
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}, |
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}, |
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{ |
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name: "operators", |
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tests: []testCase{ |
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{ |
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input: `=`, |
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expected: []item{{itemAssign, 0, `=`}}, |
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}, { |
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// Inside braces equality is a single '=' character. |
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input: `{=}`, |
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expected: []item{{itemLeftBrace, 0, `{`}, {itemEQL, 1, `=`}, {itemRightBrace, 2, `}`}}, |
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}, { |
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input: `==`, |
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expected: []item{{itemEQL, 0, `==`}}, |
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}, { |
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input: `!=`, |
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expected: []item{{itemNEQ, 0, `!=`}}, |
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}, { |
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input: `<`, |
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expected: []item{{itemLSS, 0, `<`}}, |
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}, { |
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input: `>`, |
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expected: []item{{itemGTR, 0, `>`}}, |
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}, { |
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input: `>=`, |
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expected: []item{{itemGTE, 0, `>=`}}, |
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}, { |
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input: `<=`, |
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expected: []item{{itemLTE, 0, `<=`}}, |
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}, { |
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input: `+`, |
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expected: []item{{itemADD, 0, `+`}}, |
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}, { |
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input: `-`, |
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expected: []item{{itemSUB, 0, `-`}}, |
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}, { |
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input: `*`, |
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expected: []item{{itemMUL, 0, `*`}}, |
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}, { |
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input: `/`, |
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expected: []item{{itemDIV, 0, `/`}}, |
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}, { |
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input: `^`, |
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expected: []item{{itemPOW, 0, `^`}}, |
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}, { |
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input: `%`, |
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expected: []item{{itemMOD, 0, `%`}}, |
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}, { |
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input: `AND`, |
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expected: []item{{itemLAND, 0, `AND`}}, |
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}, { |
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input: `or`, |
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expected: []item{{itemLOR, 0, `or`}}, |
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}, { |
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input: `unless`, |
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expected: []item{{itemLUnless, 0, `unless`}}, |
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}, |
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}, |
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}, |
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{ |
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name: "aggregators", |
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tests: []testCase{ |
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{ |
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input: `sum`, |
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expected: []item{{itemSum, 0, `sum`}}, |
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}, { |
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input: `AVG`, |
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expected: []item{{itemAvg, 0, `AVG`}}, |
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}, { |
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input: `MAX`, |
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expected: []item{{itemMax, 0, `MAX`}}, |
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}, { |
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input: `min`, |
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expected: []item{{itemMin, 0, `min`}}, |
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}, { |
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input: `count`, |
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expected: []item{{itemCount, 0, `count`}}, |
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}, { |
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input: `stdvar`, |
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expected: []item{{itemStdvar, 0, `stdvar`}}, |
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}, { |
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input: `stddev`, |
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expected: []item{{itemStddev, 0, `stddev`}}, |
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}, |
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}, |
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}, |
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{ |
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name: "keywords", |
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tests: []testCase{ |
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{ |
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input: "offset", |
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expected: []item{{itemOffset, 0, "offset"}}, |
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}, { |
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input: "by", |
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expected: []item{{itemBy, 0, "by"}}, |
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}, { |
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input: "without", |
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expected: []item{{itemWithout, 0, "without"}}, |
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}, { |
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input: "on", |
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expected: []item{{itemOn, 0, "on"}}, |
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}, { |
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input: "ignoring", |
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expected: []item{{itemIgnoring, 0, "ignoring"}}, |
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}, { |
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input: "group_left", |
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expected: []item{{itemGroupLeft, 0, "group_left"}}, |
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}, { |
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input: "group_right", |
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expected: []item{{itemGroupRight, 0, "group_right"}}, |
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}, { |
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input: "bool", |
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expected: []item{{itemBool, 0, "bool"}}, |
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}, |
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}, |
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}, |
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{ |
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name: "selectors", |
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tests: []testCase{ |
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{ |
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input: `台北`, |
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fail: true, |
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}, { |
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input: `{台北='a'}`, |
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fail: true, |
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}, { |
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input: `{0a='a'}`, |
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fail: true, |
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}, { |
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input: `{foo='bar'}`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `foo`}, |
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{itemEQL, 4, `=`}, |
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{itemString, 5, `'bar'`}, |
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{itemRightBrace, 10, `}`}, |
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}, |
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}, { |
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input: `{foo="bar"}`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `foo`}, |
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{itemEQL, 4, `=`}, |
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{itemString, 5, `"bar"`}, |
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{itemRightBrace, 10, `}`}, |
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}, |
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}, { |
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input: `{foo="bar\"bar"}`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `foo`}, |
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{itemEQL, 4, `=`}, |
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{itemString, 5, `"bar\"bar"`}, |
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{itemRightBrace, 15, `}`}, |
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}, |
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}, { |
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input: `{NaN != "bar" }`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `NaN`}, |
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{itemNEQ, 5, `!=`}, |
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{itemString, 8, `"bar"`}, |
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{itemRightBrace, 14, `}`}, |
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}, |
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}, { |
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input: `{alert=~"bar" }`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `alert`}, |
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{itemEQLRegex, 6, `=~`}, |
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{itemString, 8, `"bar"`}, |
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{itemRightBrace, 14, `}`}, |
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}, |
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}, { |
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input: `{on!~"bar"}`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemIdentifier, 1, `on`}, |
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{itemNEQRegex, 3, `!~`}, |
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{itemString, 5, `"bar"`}, |
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{itemRightBrace, 10, `}`}, |
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}, |
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}, { |
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input: `{alert!#"bar"}`, fail: true, |
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}, { |
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input: `{foo:a="bar"}`, fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "common errors", |
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tests: []testCase{ |
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{ |
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input: `=~`, fail: true, |
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}, { |
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input: `!~`, fail: true, |
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}, { |
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input: `!(`, fail: true, |
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}, { |
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input: "1a", fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "mismatched parentheses", |
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tests: []testCase{ |
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{ |
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input: `(`, fail: true, |
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}, { |
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input: `())`, fail: true, |
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}, { |
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input: `(()`, fail: true, |
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}, { |
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input: `{`, fail: true, |
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}, { |
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input: `}`, fail: true, |
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}, { |
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input: "{{", fail: true, |
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}, { |
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input: "{{}}", fail: true, |
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}, { |
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input: `[`, fail: true, |
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}, { |
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input: `[[`, fail: true, |
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}, { |
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input: `[]]`, fail: true, |
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}, { |
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input: `[[]]`, fail: true, |
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}, { |
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input: `]`, fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "encoding issues", |
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tests: []testCase{ |
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{ |
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input: "\"\xff\"", fail: true, |
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}, |
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{ |
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input: "`\xff`", fail: true, |
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}, |
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}, |
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}, |
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{ |
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name: "series descriptions", |
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tests: []testCase{ |
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{ |
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input: `{} _ 1 x .3`, |
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expected: []item{ |
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{itemLeftBrace, 0, `{`}, |
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{itemRightBrace, 1, `}`}, |
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{itemSpace, 2, ` `}, |
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{itemBlank, 3, `_`}, |
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{itemSpace, 4, ` `}, |
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{itemNumber, 5, `1`}, |
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{itemSpace, 6, ` `}, |
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{itemTimes, 7, `x`}, |
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{itemSpace, 8, ` `}, |
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{itemNumber, 9, `.3`}, |
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}, |
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seriesDesc: true, |
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}, |
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{ |
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input: `metric +Inf Inf NaN`, |
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expected: []item{ |
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{itemIdentifier, 0, `metric`}, |
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{itemSpace, 6, ` `}, |
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{itemADD, 7, `+`}, |
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{itemNumber, 8, `Inf`}, |
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{itemSpace, 11, ` `}, |
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{itemNumber, 12, `Inf`}, |
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{itemSpace, 15, ` `}, |
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{itemNumber, 16, `NaN`}, |
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}, |
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seriesDesc: true, |
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}, |
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{ |
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input: `metric 1+1x4`, |
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expected: []item{ |
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{itemIdentifier, 0, `metric`}, |
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{itemSpace, 6, ` `}, |
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{itemNumber, 7, `1`}, |
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{itemADD, 8, `+`}, |
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{itemNumber, 9, `1`}, |
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{itemTimes, 10, `x`}, |
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{itemNumber, 11, `4`}, |
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}, |
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seriesDesc: true, |
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}, |
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}, |
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}, |
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{ |
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name: "subqueries", |
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tests: []testCase{ |
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{ |
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input: `test_name{on!~"bar"}[4m:4s]`, |
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expected: []item{ |
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{itemIdentifier, 0, `test_name`}, |
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{itemLeftBrace, 9, `{`}, |
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{itemIdentifier, 10, `on`}, |
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{itemNEQRegex, 12, `!~`}, |
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{itemString, 14, `"bar"`}, |
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{itemRightBrace, 19, `}`}, |
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{itemLeftBracket, 20, `[`}, |
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{itemDuration, 21, `4m`}, |
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{itemColon, 23, `:`}, |
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{itemDuration, 24, `4s`}, |
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{itemRightBracket, 26, `]`}, |
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}, |
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}, |
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{ |
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input: `test:name{on!~"bar"}[4m:4s]`, |
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expected: []item{ |
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{itemMetricIdentifier, 0, `test:name`}, |
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{itemLeftBrace, 9, `{`}, |
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{itemIdentifier, 10, `on`}, |
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{itemNEQRegex, 12, `!~`}, |
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{itemString, 14, `"bar"`}, |
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{itemRightBrace, 19, `}`}, |
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{itemLeftBracket, 20, `[`}, |
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{itemDuration, 21, `4m`}, |
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{itemColon, 23, `:`}, |
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{itemDuration, 24, `4s`}, |
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{itemRightBracket, 26, `]`}, |
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}, |
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}, { |
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input: `test:name{on!~"b:ar"}[4m:4s]`, |
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expected: []item{ |
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{itemMetricIdentifier, 0, `test:name`}, |
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{itemLeftBrace, 9, `{`}, |
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{itemIdentifier, 10, `on`}, |
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{itemNEQRegex, 12, `!~`}, |
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{itemString, 14, `"b:ar"`}, |
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{itemRightBrace, 20, `}`}, |
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{itemLeftBracket, 21, `[`}, |
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{itemDuration, 22, `4m`}, |
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{itemColon, 24, `:`}, |
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{itemDuration, 25, `4s`}, |
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{itemRightBracket, 27, `]`}, |
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}, |
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}, { |
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input: `test:name{on!~"b:ar"}[4m:]`, |
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expected: []item{ |
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{itemMetricIdentifier, 0, `test:name`}, |
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{itemLeftBrace, 9, `{`}, |
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{itemIdentifier, 10, `on`}, |
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{itemNEQRegex, 12, `!~`}, |
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{itemString, 14, `"b:ar"`}, |
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{itemRightBrace, 20, `}`}, |
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{itemLeftBracket, 21, `[`}, |
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{itemDuration, 22, `4m`}, |
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{itemColon, 24, `:`}, |
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{itemRightBracket, 25, `]`}, |
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}, |
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}, { // Nested Subquery. |
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input: `min_over_time(rate(foo{bar="baz"}[2s])[5m:])[4m:3s]`, |
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expected: []item{ |
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|
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{itemIdentifier, 0, `min_over_time`}, |
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{itemLeftParen, 13, `(`}, |
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{itemIdentifier, 14, `rate`}, |
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{itemLeftParen, 18, `(`}, |
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{itemIdentifier, 19, `foo`}, |
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{itemLeftBrace, 22, `{`}, |
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{itemIdentifier, 23, `bar`}, |
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{itemEQL, 26, `=`}, |
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{itemString, 27, `"baz"`}, |
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{itemRightBrace, 32, `}`}, |
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{itemLeftBracket, 33, `[`}, |
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{itemDuration, 34, `2s`}, |
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{itemRightBracket, 36, `]`}, |
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{itemRightParen, 37, `)`}, |
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{itemLeftBracket, 38, `[`}, |
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{itemDuration, 39, `5m`}, |
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{itemColon, 41, `:`}, |
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{itemRightBracket, 42, `]`}, |
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{itemRightParen, 43, `)`}, |
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{itemLeftBracket, 44, `[`}, |
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{itemDuration, 45, `4m`}, |
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{itemColon, 47, `:`}, |
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{itemDuration, 48, `3s`}, |
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{itemRightBracket, 50, `]`}, |
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}, |
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}, |
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// Subquery with offset. |
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{ |
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input: `test:name{on!~"b:ar"}[4m:4s] offset 10m`, |
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expected: []item{ |
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{itemMetricIdentifier, 0, `test:name`}, |
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{itemLeftBrace, 9, `{`}, |
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{itemIdentifier, 10, `on`}, |
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{itemNEQRegex, 12, `!~`}, |
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{itemString, 14, `"b:ar"`}, |
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{itemRightBrace, 20, `}`}, |
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{itemLeftBracket, 21, `[`}, |
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{itemDuration, 22, `4m`}, |
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{itemColon, 24, `:`}, |
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{itemDuration, 25, `4s`}, |
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{itemRightBracket, 27, `]`}, |
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{itemOffset, 29, "offset"}, |
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{itemDuration, 36, "10m"}, |
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}, |
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}, { |
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input: `min_over_time(rate(foo{bar="baz"}[2s])[5m:] offset 6m)[4m:3s]`, |
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expected: []item{ |
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|
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{itemIdentifier, 0, `min_over_time`}, |
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{itemLeftParen, 13, `(`}, |
|
{itemIdentifier, 14, `rate`}, |
|
{itemLeftParen, 18, `(`}, |
|
{itemIdentifier, 19, `foo`}, |
|
{itemLeftBrace, 22, `{`}, |
|
{itemIdentifier, 23, `bar`}, |
|
{itemEQL, 26, `=`}, |
|
{itemString, 27, `"baz"`}, |
|
{itemRightBrace, 32, `}`}, |
|
{itemLeftBracket, 33, `[`}, |
|
{itemDuration, 34, `2s`}, |
|
{itemRightBracket, 36, `]`}, |
|
{itemRightParen, 37, `)`}, |
|
{itemLeftBracket, 38, `[`}, |
|
{itemDuration, 39, `5m`}, |
|
{itemColon, 41, `:`}, |
|
{itemRightBracket, 42, `]`}, |
|
{itemOffset, 44, `offset`}, |
|
{itemDuration, 51, `6m`}, |
|
{itemRightParen, 53, `)`}, |
|
{itemLeftBracket, 54, `[`}, |
|
{itemDuration, 55, `4m`}, |
|
{itemColon, 57, `:`}, |
|
{itemDuration, 58, `3s`}, |
|
{itemRightBracket, 60, `]`}, |
|
}, |
|
}, |
|
{ |
|
input: `test:name{o:n!~"bar"}[4m:4s]`, |
|
fail: true, |
|
}, |
|
{ |
|
input: `test:name{on!~"bar"}[4m:4s:4h]`, |
|
fail: true, |
|
}, |
|
{ |
|
input: `test:name{on!~"bar"}[4m:4s:]`, |
|
fail: true, |
|
}, |
|
{ |
|
input: `test:name{on!~"bar"}[4m::]`, |
|
fail: true, |
|
}, |
|
{ |
|
input: `test:name{on!~"bar"}[:4s]`, |
|
fail: true, |
|
}, |
|
}, |
|
}, |
|
} |
|
|
|
// TestLexer tests basic functionality of the lexer. More elaborate tests are implemented |
|
// for the parser to avoid duplicated effort. |
|
func TestLexer(t *testing.T) { |
|
for _, typ := range tests { |
|
t.Run(typ.name, func(t *testing.T) { |
|
for i, test := range typ.tests { |
|
l := &lexer{ |
|
input: test.input, |
|
items: make(chan item), |
|
seriesDesc: test.seriesDesc, |
|
} |
|
go l.run() |
|
|
|
out := []item{} |
|
for it := range l.items { |
|
out = append(out, it) |
|
} |
|
|
|
lastItem := out[len(out)-1] |
|
if test.fail { |
|
if lastItem.typ != itemError { |
|
t.Logf("%d: input %q", i, test.input) |
|
t.Fatalf("expected lexing error but did not fail") |
|
} |
|
continue |
|
} |
|
if lastItem.typ == itemError { |
|
t.Logf("%d: input %q", i, test.input) |
|
t.Fatalf("unexpected lexing error at position %d: %s", lastItem.pos, lastItem) |
|
} |
|
|
|
if !reflect.DeepEqual(lastItem, item{itemEOF, Pos(len(test.input)), ""}) { |
|
t.Logf("%d: input %q", i, test.input) |
|
t.Fatalf("lexing error: expected output to end with EOF item.\ngot:\n%s", expectedList(out)) |
|
} |
|
out = out[:len(out)-1] |
|
if !reflect.DeepEqual(out, test.expected) { |
|
t.Logf("%d: input %q", i, test.input) |
|
t.Fatalf("lexing mismatch:\nexpected:\n%s\ngot:\n%s", expectedList(test.expected), expectedList(out)) |
|
} |
|
} |
|
}) |
|
} |
|
} |
|
|
|
func expectedList(exp []item) string { |
|
s := "" |
|
for _, it := range exp { |
|
s += fmt.Sprintf("\t%#v\n", it) |
|
} |
|
return s |
|
}
|
|
|