telegraf/metric/metric_test.go

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package metric
import (
"testing"
"time"
"github.com/influxdata/telegraf"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewMetric(t *testing.T) {
now := time.Now()
tags := map[string]string{
"host": "localhost",
"datacenter": "us-east-1",
}
fields := map[string]interface{}{
"usage_idle": float64(99),
"usage_busy": float64(1),
}
m, err := New("cpu", tags, fields, now)
require.NoError(t, err)
require.Equal(t, "cpu", m.Name())
require.Equal(t, tags, m.Tags())
require.Equal(t, fields, m.Fields())
require.Equal(t, 2, len(m.FieldList()))
require.Equal(t, now, m.Time())
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}
func baseMetric() telegraf.Metric {
tags := map[string]string{}
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fields := map[string]interface{}{
"value": float64(1),
}
now := time.Now()
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m, err := New("cpu", tags, fields, now)
if err != nil {
panic(err)
}
return m
}
func TestHasTag(t *testing.T) {
m := baseMetric()
require.False(t, m.HasTag("host"))
m.AddTag("host", "localhost")
require.True(t, m.HasTag("host"))
m.RemoveTag("host")
require.False(t, m.HasTag("host"))
}
func TestAddTagOverwrites(t *testing.T) {
m := baseMetric()
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m.AddTag("host", "localhost")
m.AddTag("host", "example.org")
value, ok := m.GetTag("host")
require.True(t, ok)
require.Equal(t, "example.org", value)
require.Equal(t, 1, len(m.TagList()))
}
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func TestRemoveTagNoEffectOnMissingTags(t *testing.T) {
m := baseMetric()
m.RemoveTag("foo")
m.AddTag("a", "x")
m.RemoveTag("foo")
m.RemoveTag("bar")
value, ok := m.GetTag("a")
require.True(t, ok)
require.Equal(t, "x", value)
}
func TestGetTag(t *testing.T) {
m := baseMetric()
value, ok := m.GetTag("host")
require.False(t, ok)
m.AddTag("host", "localhost")
value, ok = m.GetTag("host")
require.True(t, ok)
require.Equal(t, "localhost", value)
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m.RemoveTag("host")
value, ok = m.GetTag("host")
require.False(t, ok)
}
func TestHasField(t *testing.T) {
m := baseMetric()
require.False(t, m.HasField("x"))
m.AddField("x", 42.0)
require.True(t, m.HasField("x"))
m.RemoveTag("x")
require.False(t, m.HasTag("x"))
}
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func TestAddFieldOverwrites(t *testing.T) {
m := baseMetric()
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m.AddField("value", 1.0)
m.AddField("value", 42.0)
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value, ok := m.GetField("value")
require.True(t, ok)
require.Equal(t, 42.0, value)
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}
func TestAddFieldChangesType(t *testing.T) {
m := baseMetric()
m.AddField("value", 1.0)
m.AddField("value", "xyzzy")
value, ok := m.GetField("value")
require.True(t, ok)
require.Equal(t, "xyzzy", value)
}
func TestRemoveFieldNoEffectOnMissingFields(t *testing.T) {
m := baseMetric()
m.RemoveField("foo")
m.AddField("a", "x")
m.RemoveField("foo")
m.RemoveField("bar")
value, ok := m.GetField("a")
require.True(t, ok)
require.Equal(t, "x", value)
}
func TestGetField(t *testing.T) {
m := baseMetric()
value, ok := m.GetField("foo")
require.False(t, ok)
m.AddField("foo", "bar")
value, ok = m.GetField("foo")
require.True(t, ok)
require.Equal(t, "bar", value)
m.RemoveTag("foo")
value, ok = m.GetTag("foo")
require.False(t, ok)
}
func TestTagList_Sorted(t *testing.T) {
m := baseMetric()
m.AddTag("b", "y")
m.AddTag("c", "z")
m.AddTag("a", "x")
taglist := m.TagList()
require.Equal(t, "a", taglist[0].Key)
require.Equal(t, "b", taglist[1].Key)
require.Equal(t, "c", taglist[2].Key)
}
func TestEquals(t *testing.T) {
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now := time.Now()
m1, err := New("cpu",
map[string]string{
"host": "localhost",
},
map[string]interface{}{
"value": 42.0,
},
now,
)
require.NoError(t, err)
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m2, err := New("cpu",
map[string]string{
"host": "localhost",
},
map[string]interface{}{
"value": 42.0,
},
now,
)
require.NoError(t, err)
lhs := m1.(*metric)
require.Equal(t, lhs, m2)
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m3 := m2.Copy()
require.Equal(t, lhs, m3)
m3.AddTag("a", "x")
require.NotEqual(t, lhs, m3)
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}
func TestHashID(t *testing.T) {
m, _ := New(
"cpu",
map[string]string{
"datacenter": "us-east-1",
"mytag": "foo",
"another": "tag",
},
map[string]interface{}{
"value": float64(1),
},
time.Now(),
)
hash := m.HashID()
// adding a field doesn't change the hash:
m.AddField("foo", int64(100))
assert.Equal(t, hash, m.HashID())
// removing a non-existent tag doesn't change the hash:
m.RemoveTag("no-op")
assert.Equal(t, hash, m.HashID())
// adding a tag does change it:
m.AddTag("foo", "bar")
assert.NotEqual(t, hash, m.HashID())
hash = m.HashID()
// removing a tag also changes it:
m.RemoveTag("mytag")
assert.NotEqual(t, hash, m.HashID())
}
func TestHashID_Consistency(t *testing.T) {
m, _ := New(
"cpu",
map[string]string{
"datacenter": "us-east-1",
"mytag": "foo",
"another": "tag",
},
map[string]interface{}{
"value": float64(1),
},
time.Now(),
)
hash := m.HashID()
m2, _ := New(
"cpu",
map[string]string{
"datacenter": "us-east-1",
"mytag": "foo",
"another": "tag",
},
map[string]interface{}{
"value": float64(1),
},
time.Now(),
)
assert.Equal(t, hash, m2.HashID())
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m3 := m.Copy()
assert.Equal(t, m2.HashID(), m3.HashID())
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}
func TestHashID_Delimiting(t *testing.T) {
m1, _ := New(
"cpu",
map[string]string{
"a": "x",
"b": "y",
"c": "z",
},
map[string]interface{}{
"value": float64(1),
},
time.Now(),
)
m2, _ := New(
"cpu",
map[string]string{
"a": "xbycz",
},
map[string]interface{}{
"value": float64(1),
},
time.Now(),
)
assert.NotEqual(t, m1.HashID(), m2.HashID())
}
func TestSetName(t *testing.T) {
m := baseMetric()
m.SetName("foo")
require.Equal(t, "foo", m.Name())
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}
func TestAddPrefix(t *testing.T) {
m := baseMetric()
m.AddPrefix("foo_")
require.Equal(t, "foo_cpu", m.Name())
m.AddPrefix("foo_")
require.Equal(t, "foo_foo_cpu", m.Name())
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}
func TestAddSuffix(t *testing.T) {
m := baseMetric()
m.AddSuffix("_foo")
require.Equal(t, "cpu_foo", m.Name())
m.AddSuffix("_foo")
require.Equal(t, "cpu_foo_foo", m.Name())
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}
func TestValueType(t *testing.T) {
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now := time.Now()
tags := map[string]string{}
fields := map[string]interface{}{
"value": float64(42),
}
m, err := New("cpu", tags, fields, now, telegraf.Gauge)
assert.NoError(t, err)
assert.Equal(t, telegraf.Gauge, m.Type())
}
func TestCopyAggreate(t *testing.T) {
m1 := baseMetric()
m1.SetAggregate(true)
m2 := m1.Copy()
assert.True(t, m2.IsAggregate())
}