telegraf/selfstat/selfstat_test.go

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package selfstat
import (
"sync"
"testing"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var (
// only allow one test at a time
// this is because we are dealing with a global registry
testLock sync.Mutex
a int64
)
// testCleanup resets the global registry for test cleanup & unlocks the test lock
func testCleanup() {
registry = &rgstry{
stats: make(map[uint64]map[string]Stat),
}
testLock.Unlock()
}
func BenchmarkStats(b *testing.B) {
testLock.Lock()
defer testCleanup()
b1 := Register("benchmark1", "test_field1", map[string]string{"test": "foo"})
for n := 0; n < b.N; n++ {
b1.Incr(1)
b1.Incr(3)
a = b1.Get()
}
}
func BenchmarkTimingStats(b *testing.B) {
testLock.Lock()
defer testCleanup()
b2 := RegisterTiming("benchmark2", "test_field1", map[string]string{"test": "foo"})
for n := 0; n < b.N; n++ {
b2.Incr(1)
b2.Incr(3)
a = b2.Get()
}
}
func TestRegisterAndIncrAndSet(t *testing.T) {
testLock.Lock()
defer testCleanup()
s1 := Register("test", "test_field1", map[string]string{"test": "foo"})
s2 := Register("test", "test_field2", map[string]string{"test": "foo"})
assert.Equal(t, int64(0), s1.Get())
s1.Incr(10)
s1.Incr(5)
assert.Equal(t, int64(15), s1.Get())
s1.Set(12)
assert.Equal(t, int64(12), s1.Get())
s1.Incr(-2)
assert.Equal(t, int64(10), s1.Get())
s2.Set(101)
assert.Equal(t, int64(101), s2.Get())
// make sure that the same field returns the same metric
// this one should be the same as s2.
foo := Register("test", "test_field2", map[string]string{"test": "foo"})
assert.Equal(t, int64(101), foo.Get())
// check that tags are consistent
assert.Equal(t, map[string]string{"test": "foo"}, foo.Tags())
assert.Equal(t, "internal_test", foo.Name())
}
func TestRegisterTimingAndIncrAndSet(t *testing.T) {
testLock.Lock()
defer testCleanup()
s1 := RegisterTiming("test", "test_field1_ns", map[string]string{"test": "foo"})
s2 := RegisterTiming("test", "test_field2_ns", map[string]string{"test": "foo"})
assert.Equal(t, int64(0), s1.Get())
s1.Incr(10)
s1.Incr(5)
assert.Equal(t, int64(7), s1.Get())
// previous value is used on subsequent calls to Get()
assert.Equal(t, int64(7), s1.Get())
s1.Set(12)
assert.Equal(t, int64(12), s1.Get())
s1.Incr(-2)
assert.Equal(t, int64(-2), s1.Get())
s2.Set(101)
assert.Equal(t, int64(101), s2.Get())
// make sure that the same field returns the same metric
// this one should be the same as s2.
foo := RegisterTiming("test", "test_field2_ns", map[string]string{"test": "foo"})
assert.Equal(t, int64(101), foo.Get())
// check that tags are consistent
assert.Equal(t, map[string]string{"test": "foo"}, foo.Tags())
assert.Equal(t, "internal_test", foo.Name())
}
func TestStatKeyConsistency(t *testing.T) {
lhs := key("internal_stats", map[string]string{
"foo": "bar",
"bar": "baz",
"whose": "first",
})
rhs := key("internal_stats", map[string]string{
"foo": "bar",
"bar": "baz",
"whose": "first",
})
require.Equal(t, lhs, rhs)
}
func TestRegisterMetricsAndVerify(t *testing.T) {
testLock.Lock()
defer testCleanup()
// register two metrics with the same key
s1 := RegisterTiming("test_timing", "test_field1_ns", map[string]string{"test": "foo"})
s2 := RegisterTiming("test_timing", "test_field2_ns", map[string]string{"test": "foo"})
s1.Incr(10)
s2.Incr(15)
assert.Len(t, Metrics(), 1)
// register two more metrics with different keys
s3 := RegisterTiming("test_timing", "test_field1_ns", map[string]string{"test": "bar"})
s4 := RegisterTiming("test_timing", "test_field2_ns", map[string]string{"test": "baz"})
s3.Incr(10)
s4.Incr(15)
assert.Len(t, Metrics(), 3)
// register some non-timing metrics
s5 := Register("test", "test_field1", map[string]string{"test": "bar"})
s6 := Register("test", "test_field2", map[string]string{"test": "baz"})
Register("test", "test_field3", map[string]string{"test": "baz"})
s5.Incr(10)
s5.Incr(18)
s6.Incr(15)
assert.Len(t, Metrics(), 5)
acc := testutil.Accumulator{}
acc.AddMetrics(Metrics())
// verify s1 & s2
acc.AssertContainsTaggedFields(t, "internal_test_timing",
map[string]interface{}{
"test_field1_ns": int64(10),
"test_field2_ns": int64(15),
},
map[string]string{
"test": "foo",
},
)
// verify s3
acc.AssertContainsTaggedFields(t, "internal_test_timing",
map[string]interface{}{
"test_field1_ns": int64(10),
},
map[string]string{
"test": "bar",
},
)
// verify s4
acc.AssertContainsTaggedFields(t, "internal_test_timing",
map[string]interface{}{
"test_field2_ns": int64(15),
},
map[string]string{
"test": "baz",
},
)
// verify s5
acc.AssertContainsTaggedFields(t, "internal_test",
map[string]interface{}{
"test_field1": int64(28),
},
map[string]string{
"test": "bar",
},
)
// verify s6 & s7
acc.AssertContainsTaggedFields(t, "internal_test",
map[string]interface{}{
"test_field2": int64(15),
"test_field3": int64(0),
},
map[string]string{
"test": "baz",
},
)
}
func TestRegisterCopy(t *testing.T) {
tags := map[string]string{"input": "mem", "alias": "mem1"}
stat := Register("gather", "metrics_gathered", tags)
tags["new"] = "value"
require.NotEqual(t, tags, stat.Tags())
}