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handler_test.go
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215 lines (166 loc) · 5.18 KB
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package slogbuffer_test
import (
"fmt"
"github.com/delicb/slogbuffer"
"log/slog"
"testing"
)
func TestBufferLogHandler_Handle_Level(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelInfo)
l := slog.New(h)
l.Debug("discarded message")
l.Info("info msg")
l.Warn("warn")
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 2)
expectLevel(t, lines[0], slog.LevelInfo)
expectMsg(t, lines[0], "info msg")
expectLevel(t, lines[1], slog.LevelWarn)
expectMsg(t, lines[1], "warn")
}
func TestBufferLogHandler_recordWithAttributes(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
l.Debug("debug msg", "my-level", "debug")
l.Info("info msg", slog.String("my-level", "info"))
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 2)
expectMsg(t, lines[0], "debug msg")
expectLevel(t, lines[0], slog.LevelDebug)
expectAttr(t, lines[0], "my-level", "debug")
expectMsg(t, lines[1], "info msg")
expectLevel(t, lines[1], slog.LevelInfo)
expectAttr(t, lines[1], "my-level", "info")
}
func TestBufferLogHandler_WithAttrs(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
commonAttrs := l.With("common", "attr")
commonAttrs.With("sub-common", "sub-attr").Info("info msg", "rec-attr", "some value")
commonAttrs.Warn("warn msg", slog.Int("some-int", 42))
l.Error("error msg")
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 3)
expectLevel(t, lines[0], slog.LevelInfo)
expectMsg(t, lines[0], "info msg")
expectAttr(t, lines[0], "common", "attr")
expectAttr(t, lines[0], "sub-common", "sub-attr")
expectAttr(t, lines[0], "rec-attr", "some value")
expectLevel(t, lines[1], slog.LevelWarn)
expectMsg(t, lines[1], "warn msg")
expectAttr(t, lines[1], "some-int", "42")
expectAttr(t, lines[1], "common", "attr")
expectNoAttr(t, lines[1], "sub-common", "sub-attr")
expectLevel(t, lines[2], slog.LevelError)
expectMsg(t, lines[2], "error msg")
expectNoAttr(t, lines[2], "common", "attr")
}
func TestBufferLogHandler_WithGroup(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
l.WithGroup("g1").Info("info msg", "foo", "bar")
l.WithGroup("g1").WithGroup("g2").Warn("warn msg", "foo", "bar")
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 2)
expectLevel(t, lines[0], slog.LevelInfo)
expectMsg(t, lines[0], "info msg")
expectAttr(t, lines[0], "g1.foo", "bar")
expectLevel(t, lines[1], slog.LevelWarn)
expectMsg(t, lines[1], "warn msg")
expectAttr(t, lines[1], "g1.g2.foo", "bar")
}
func TestBufferLogHandler_WithRealHandler(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
// when
l.Info("info msg")
l.With("common", "attr").Warn("warn msg")
l.WithGroup("g1").Error("error msg", "in-group", "group")
// then
lines := getLines(t, reader)
expectLinesNo(t, lines, 3)
expectLevel(t, lines[0], slog.LevelInfo)
expectMsg(t, lines[0], "info msg")
expectLevel(t, lines[1], slog.LevelWarn)
expectMsg(t, lines[1], "warn msg")
expectAttr(t, lines[1], "common", "attr")
expectLevel(t, lines[2], slog.LevelError)
expectMsg(t, lines[2], "error msg")
expectAttr(t, lines[2], "g1.in-group", "group")
}
func TestBufferLogHandler_LimitedBuffer(t *testing.T) {
// given
h := slogbuffer.NewBoundBufferLogHandler(slog.LevelDebug, 3)
l := slog.New(h)
// adding 5 messages (from 0 to 4), while having capcity only for 3
for i := range 5 {
l.Info("msg", slog.Int("no", i))
}
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 3) // only buffered lines, oldest are dropped
for i := range 3 {
line := lines[i]
// same level and msg for all records
expectLevel(t, line, slog.LevelInfo)
expectMsg(t, line, "msg")
// different attr, expecting 0 and 1 to be dropped since they are logged first
// so adding +2 to loop variable (i) to get expected value
expectAttr(t, line, "no", fmt.Sprintf("%d", i+2))
}
}
func TestBufferLogHandler_Discard(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
l.Info("info msg")
h.Discard()
// when
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
lines := getLines(t, reader)
// then
expectLinesNo(t, lines, 0)
}
func TestBufferLogHandler_AfterSetRealHandler(t *testing.T) {
// given
h := slogbuffer.NewBufferLogHandler(slog.LevelDebug)
l := slog.New(h)
withAttr := l.With("common", "attr")
rh, reader := getSimplifiedTextHandler()
setRealHandler(t, h, rh)
// when
withAttr.Info("info msg")
// then
lines := getLines(t, reader)
expectLinesNo(t, lines, 1)
expectLevel(t, lines[0], slog.LevelInfo)
expectMsg(t, lines[0], "info msg")
expectAttr(t, lines[0], "common", "attr")
}