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parser_test.go
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parser_test.go
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package snatch_test
import (
"testing"
"time"
"github.com/nrwiersma/snatch"
"github.com/stretchr/testify/assert"
)
func TestNewParser(t *testing.T) {
p := snatch.NewParser(time.Second)
assert.IsType(t, &snatch.Parser{}, p)
}
func TestParser_ParseCanParseValidMetrics(t *testing.T) {
metrics := [][]byte{
[]byte("lvl=info msg= count#test=2 foo=\"bar\" size=10"),
[]byte("lvl=info msg= count#[email protected]=2 foo=\"bar\" size=10"),
[]byte("lvl=info msg= count#test=-2 foo=\"bar\" size=10"),
[]byte("lvl=info msg= count#[email protected]=-2 foo=\"bar\" size=10"),
[]byte("lvl=info msg= sample#test=2.3 foo=\"bar\" size=10"),
[]byte("lvl=info msg= sample#[email protected]=2.3 foo=\"bar\" size=10"),
[]byte("lvl=info msg= measure#test=2.3ms foo=\"bar\" size=10"),
[]byte("lvl=info msg= measure#[email protected]=2.3ms foo=\"bar\" size=10"),
}
for _, m := range metrics {
p := snatch.NewParser(time.Second)
bkts, err := p.Parse(m)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
}
}
func TestParser_ParseErrorsOnInvalidMetrics(t *testing.T) {
metrics := [][]byte{
[]byte("count#test=test"),
[]byte("foo#test=1.2"),
[]byte("count#=1.2"),
[]byte("sample#test=1-2"),
[]byte("count#test=\"1.2"),
}
for _, m := range metrics {
p := snatch.NewParser(time.Second)
_, err := p.Parse(m)
assert.Error(t, err)
}
}
func TestParser_ParseHandlesCount(t *testing.T) {
m := []byte("count#prefix.test=2")
p := snatch.NewParser(30 * time.Second)
bkts, err := p.Parse(m)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, "prefix.test", bkts[0].ID.Name)
assert.Equal(t, []float64{2}, bkts[0].Vals)
}
func TestParser_ParseHandlesSample(t *testing.T) {
m := []byte("sample#prefix.test=2.5")
p := snatch.NewParser(30 * time.Second)
bkts, err := p.Parse(m)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, "prefix.test", bkts[0].ID.Name)
assert.Equal(t, []float64{2.5}, bkts[0].Vals)
}
func TestParser_ParseHandlesMeasure(t *testing.T) {
m := []byte("measure#prefix.test=2.545ms")
p := snatch.NewParser(30 * time.Second)
bkts, err := p.Parse(m)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, "prefix.test", bkts[0].ID.Name)
assert.Equal(t, []float64{2.545}, bkts[0].Vals)
assert.Equal(t, "ms", bkts[0].Units)
}
func TestParser_ParseHandlesBadTime(t *testing.T) {
m := []byte("lvl=info msg= count#test=2")
p := snatch.NewParser(30 * time.Second)
bkts, err := p.Parse(m)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, time.Now().Truncate(time.Minute), bkts[0].ID.Time.Truncate(time.Minute))
}
func TestParser_ParseHandlesTags(t *testing.T) {
m := []byte("lvl=info msg= count#test=2 foo=\"bar\" size=10 test=test")
p := snatch.NewParser(time.Second)
bkts, err := p.Parse(m)
want := []string{
"foo", "bar",
"size", "10",
"test", "test",
}
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, want, bkts[0].ID.Tags)
}
func TestParser_ParseHandlesRates(t *testing.T) {
tests := []struct {
metric []byte
vals []float64
}{
{
metric: []byte("count#[email protected]=2"),
vals: []float64{20},
},
{
metric: []byte("count#[email protected]=-2"),
vals: []float64{-20},
},
{
metric: []byte("sample#[email protected]=2.3"),
vals: []float64{2.3},
},
{
metric: []byte("measure#[email protected]=2.3ms"),
vals: []float64{2.3, 2.3, 2.3, 2.3, 2.3},
},
}
for _, tt := range tests {
p := snatch.NewParser(time.Second)
bkts, err := p.Parse(tt.metric)
assert.NoError(t, err)
assert.Len(t, bkts, 1)
assert.Equal(t, tt.vals, bkts[0].Vals)
}
}
func BenchmarkParser_Parse(b *testing.B) {
m := []byte("lvl=info msg= count#[email protected]=2ms foo=\"bar\" size=10")
p := snatch.NewParser(time.Second)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = p.Parse(m)
}
}