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package zerolog
import (
"bytes"
"io/ioutil"
"testing"
)
var (
levelNameHook = HookFunc(func(e *Event, level Level, msg string) {
levelName := level.String()
if level == NoLevel {
levelName = "nolevel"
}
e.Str("level_name", levelName)
})
simpleHook = HookFunc(func(e *Event, level Level, msg string) {
e.Bool("has_level", level != NoLevel)
e.Str("test", "logged")
})
copyHook = HookFunc(func(e *Event, level Level, msg string) {
hasLevel := level != NoLevel
e.Bool("copy_has_level", hasLevel)
if hasLevel {
e.Str("copy_level", level.String())
}
e.Str("copy_msg", msg)
})
nopHook = HookFunc(func(e *Event, level Level, message string) {
})
discardHook = HookFunc(func(e *Event, level Level, message string) {
e.Discard()
})
)
func TestHook(t *testing.T) {
tests := []struct {
name string
want string
test func(log Logger)
}{
{"Message", `{"level_name":"nolevel","message":"test message"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook)
log.Log().Msg("test message")
}},
{"NoLevel", `{"level_name":"nolevel"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook)
log.Log().Msg("")
}},
{"Print", `{"level":"debug","level_name":"debug"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook)
log.Print("")
}},
{"Error", `{"level":"error","level_name":"error"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook)
log.Error().Msg("")
}},
{"Copy/1", `{"copy_has_level":false,"copy_msg":""}` + "\n", func(log Logger) {
log = log.Hook(copyHook)
log.Log().Msg("")
}},
{"Copy/2", `{"level":"info","copy_has_level":true,"copy_level":"info","copy_msg":"a message","message":"a message"}` + "\n", func(log Logger) {
log = log.Hook(copyHook)
log.Info().Msg("a message")
}},
{"Multi", `{"level":"error","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook).Hook(simpleHook)
log.Error().Msg("")
}},
{"Multi/Message", `{"level":"error","level_name":"error","has_level":true,"test":"logged","message":"a message"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook).Hook(simpleHook)
log.Error().Msg("a message")
}},
{"Output/single/pre", `{"level":"error","level_name":"error"}` + "\n", func(log Logger) {
ignored := &bytes.Buffer{}
log = New(ignored).Hook(levelNameHook).Output(log.w)
log.Error().Msg("")
}},
{"Output/single/post", `{"level":"error","level_name":"error"}` + "\n", func(log Logger) {
ignored := &bytes.Buffer{}
log = New(ignored).Output(log.w).Hook(levelNameHook)
log.Error().Msg("")
}},
{"Output/multi/pre", `{"level":"error","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
ignored := &bytes.Buffer{}
log = New(ignored).Hook(levelNameHook).Hook(simpleHook).Output(log.w)
log.Error().Msg("")
}},
{"Output/multi/post", `{"level":"error","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
ignored := &bytes.Buffer{}
log = New(ignored).Output(log.w).Hook(levelNameHook).Hook(simpleHook)
log.Error().Msg("")
}},
{"Output/mixed", `{"level":"error","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
ignored := &bytes.Buffer{}
log = New(ignored).Hook(levelNameHook).Output(log.w).Hook(simpleHook)
log.Error().Msg("")
}},
{"With/single/pre", `{"level":"error","with":"pre","level_name":"error"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook).With().Str("with", "pre").Logger()
log.Error().Msg("")
}},
{"With/single/post", `{"level":"error","with":"post","level_name":"error"}` + "\n", func(log Logger) {
log = log.With().Str("with", "post").Logger().Hook(levelNameHook)
log.Error().Msg("")
}},
{"With/multi/pre", `{"level":"error","with":"pre","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook).Hook(simpleHook).With().Str("with", "pre").Logger()
log.Error().Msg("")
}},
{"With/multi/post", `{"level":"error","with":"post","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
log = log.With().Str("with", "post").Logger().Hook(levelNameHook).Hook(simpleHook)
log.Error().Msg("")
}},
{"With/mixed", `{"level":"error","with":"mixed","level_name":"error","has_level":true,"test":"logged"}` + "\n", func(log Logger) {
log = log.Hook(levelNameHook).With().Str("with", "mixed").Logger().Hook(simpleHook)
log.Error().Msg("")
}},
{"Discard", "", func(log Logger) {
log = log.Hook(discardHook)
log.Log().Msg("test message")
}},
{"None", `{"level":"error"}` + "\n", func(log Logger) {
log.Error().Msg("")
}},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
tt.test(log)
if got, want := decodeIfBinaryToString(out.Bytes()), tt.want; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
}
})
}
}
func BenchmarkHooks(b *testing.B) {
logger := New(ioutil.Discard)
b.ResetTimer()
b.Run("Nop/Single", func(b *testing.B) {
log := logger.Hook(nopHook)
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
log.Log().Msg("")
}
})
})
b.Run("Nop/Multi", func(b *testing.B) {
log := logger.Hook(nopHook).Hook(nopHook)
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
log.Log().Msg("")
}
})
})
b.Run("Simple", func(b *testing.B) {
log := logger.Hook(simpleHook)
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
log.Log().Msg("")
}
})
})
}
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