60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// 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 MATRIX }
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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, view *viewAdapter) Matrix {
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return Matrix{
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metric.SampleSet{
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Metric: clientmodel.Metric{clientmodel.MetricNameLabel: "empty_metric"},
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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, view *viewAdapter) Matrix {
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return Matrix{
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metric.SampleSet{
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Metric: clientmodel.Metric{clientmodel.MetricNameLabel: "empty_metric"},
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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, nil, []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, nil, []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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