mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-14 10:13:10 +02:00
73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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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 metric
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import (
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"testing"
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"go.opentelemetry.io/otel/api/kv"
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"go.opentelemetry.io/otel/api/label"
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"github.com/stretchr/testify/require"
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)
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var testSlice = []kv.KeyValue{
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kv.String("bar", "baz"),
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kv.Int("foo", 42),
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}
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func newIter(slice []kv.KeyValue) label.Iterator {
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labels := label.NewSet(slice...)
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return labels.Iter()
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}
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func TestLabelIterator(t *testing.T) {
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iter := newIter(testSlice)
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require.Equal(t, 2, iter.Len())
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require.True(t, iter.Next())
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require.Equal(t, kv.String("bar", "baz"), iter.Label())
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idx, label := iter.IndexedLabel()
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require.Equal(t, 0, idx)
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require.Equal(t, kv.String("bar", "baz"), label)
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require.Equal(t, 2, iter.Len())
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require.True(t, iter.Next())
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require.Equal(t, kv.Int("foo", 42), iter.Label())
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idx, label = iter.IndexedLabel()
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require.Equal(t, 1, idx)
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require.Equal(t, kv.Int("foo", 42), label)
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require.Equal(t, 2, iter.Len())
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require.False(t, iter.Next())
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require.Equal(t, 2, iter.Len())
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}
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func TestEmptyLabelIterator(t *testing.T) {
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iter := newIter(nil)
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require.Equal(t, 0, iter.Len())
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require.False(t, iter.Next())
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}
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func TestIteratorToSlice(t *testing.T) {
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iter := newIter(testSlice)
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got := iter.ToSlice()
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require.Equal(t, testSlice, got)
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iter = newIter(nil)
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got = iter.ToSlice()
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require.Nil(t, got)
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}
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