log4g

README

log4g

How To Use?

go get -u github.com/acmestack/log4g

Import

import "github.com/acmestack/log4g/log"

Log Example

log.SetLevel(log.TraceLevel)
defer log.Reset()

log.Trace("a", "=", "1")
log.Tracef("a=%d", 1)

log.Trace(func() []interface{} {
    return log.T("a", "=", "1")
})

log.Tracef("a=%d", func() []interface{} {
    return log.T(1)
})

...

ctx := context.WithValue(context.TODO(), traceIDKey, "0689")

log.SetLevel(log.TraceLevel)
log.SetOutput(myOutput)
defer log.Reset()

logger := log.Ctx(ctx)
logger.Trace("level:", "trace")
logger.Tracef("level:%s", "trace")

...

logger = log.Tag("__in")
logger.Ctx(ctx).Trace("level:", "trace")
logger.Ctx(ctx).Tracef("level:%s", "trace")

...

Color Example

fmt.Println(color.BgBlack.Sprint("ok"))
fmt.Println(color.BgRed.Sprint("ok"))
fmt.Println(color.BgGreen.Sprint("ok"))
fmt.Println(color.BgYellow.Sprint("ok"))

attributes := []color.Attribute{
    color.Bold,
    color.Italic,
    color.Underline,
    color.ReverseVideo,
    color.CrossedOut,
    color.Red,
    color.BgGreen,
}

fmt.Println(color.NewText(attributes...).Sprint("ok"))

Assert Example

assert.True(t, true)
assert.Nil(t, nil)
assert.Equal(t, 0, "0")
assert.NotEqual(t, "0", 0)
assert.Same(t, 0, "0")
assert.NotSame(t, "0", "0")
assert.Panic(g, func() {}, "an error")
assert.Matches(g, "there's no error", "an error")
assert.Error(g, errors.New("there's no error"), "an error")
assert.TypeOf(g, new(int), (*int)(nil))
assert.Implements(g, errors.New("error"), (*error)(nil))