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opentelemetry-go/sdk/export/metric/metric_test.go
Chen Yixiao 1301b6f3e4
Move core and key to kv package (#720)
* Move core to kv

* Move kv.Value to kv.value.Value

* Move key to kv
2020-05-13 16:06:03 -07:00

73 lines
1.8 KiB
Go

// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric
import (
"testing"
"go.opentelemetry.io/otel/api/kv"
"go.opentelemetry.io/otel/api/label"
"github.com/stretchr/testify/require"
)
var testSlice = []kv.KeyValue{
kv.String("bar", "baz"),
kv.Int("foo", 42),
}
func newIter(slice []kv.KeyValue) label.Iterator {
labels := label.NewSet(slice...)
return labels.Iter()
}
func TestLabelIterator(t *testing.T) {
iter := newIter(testSlice)
require.Equal(t, 2, iter.Len())
require.True(t, iter.Next())
require.Equal(t, kv.String("bar", "baz"), iter.Label())
idx, label := iter.IndexedLabel()
require.Equal(t, 0, idx)
require.Equal(t, kv.String("bar", "baz"), label)
require.Equal(t, 2, iter.Len())
require.True(t, iter.Next())
require.Equal(t, kv.Int("foo", 42), iter.Label())
idx, label = iter.IndexedLabel()
require.Equal(t, 1, idx)
require.Equal(t, kv.Int("foo", 42), label)
require.Equal(t, 2, iter.Len())
require.False(t, iter.Next())
require.Equal(t, 2, iter.Len())
}
func TestEmptyLabelIterator(t *testing.T) {
iter := newIter(nil)
require.Equal(t, 0, iter.Len())
require.False(t, iter.Next())
}
func TestIteratorToSlice(t *testing.T) {
iter := newIter(testSlice)
got := iter.ToSlice()
require.Equal(t, testSlice, got)
iter = newIter(nil)
got = iter.ToSlice()
require.Nil(t, got)
}