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63 lines
2.0 KiB
63 lines
2.0 KiB
// Copyright 2013 Prometheus Team |
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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 ast |
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import ( |
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"testing" |
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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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type emptyRangeNode struct{} |
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func (node emptyRangeNode) Type() ExprType { return MatrixType } |
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func (node emptyRangeNode) NodeTreeToDotGraph() string { return "" } |
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func (node emptyRangeNode) String() string { return "" } |
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func (node emptyRangeNode) Children() Nodes { return Nodes{} } |
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func (node emptyRangeNode) Eval(timestamp clientmodel.Timestamp) Matrix { |
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return Matrix{ |
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SampleStream{ |
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Metric: clientmodel.COWMetric{ |
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Metric: clientmodel.Metric{clientmodel.MetricNameLabel: "empty_metric"}, |
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}, |
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Values: metric.Values{}, |
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}, |
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} |
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} |
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func (node emptyRangeNode) EvalBoundaries(timestamp clientmodel.Timestamp) Matrix { |
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return Matrix{ |
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SampleStream{ |
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Metric: clientmodel.COWMetric{ |
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Metric: clientmodel.Metric{clientmodel.MetricNameLabel: "empty_metric"}, |
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}, |
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Values: metric.Values{}, |
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}, |
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} |
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} |
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func TestDeltaWithEmptyElementDoesNotCrash(t *testing.T) { |
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now := clientmodel.Now() |
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vector := deltaImpl(now, []Node{emptyRangeNode{}, &ScalarLiteral{value: 0}}).(Vector) |
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if len(vector) != 0 { |
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t.Fatalf("Expected empty result vector, got: %v", vector) |
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} |
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vector = deltaImpl(now, []Node{emptyRangeNode{}, &ScalarLiteral{value: 1}}).(Vector) |
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if len(vector) != 0 { |
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t.Fatalf("Expected empty result vector, got: %v", vector) |
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} |
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}
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