mediocre-go-lib/m/m_test.go

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package m
import (
"context"
"encoding/json"
. "testing"
"github.com/mediocregopher/mediocre-go-lib/mcfg"
"github.com/mediocregopher/mediocre-go-lib/mctx"
"github.com/mediocregopher/mediocre-go-lib/mlog"
"github.com/mediocregopher/mediocre-go-lib/mrun"
"github.com/mediocregopher/mediocre-go-lib/mtest/massert"
)
func TestServiceCtx(t *T) {
t.Run("log-level", func(t *T) {
ctx := ServiceContext()
// pull the Logger out of the ctx and set the Handler on it, so we can check
// the log level
var msgs []mlog.Message
logger := mlog.From(ctx)
logger.SetHandler(func(msg mlog.Message) error {
msgs = append(msgs, msg)
return nil
})
// create a child Context before running to ensure it the change propagates
// correctly.
ctxA := mctx.NewChild(ctx, "A")
ctx = mctx.WithChild(ctx, ctxA)
params := mcfg.ParamValues{{Name: "log-level", Value: json.RawMessage(`"DEBUG"`)}}
if err := mcfg.Populate(ctx, params); err != nil {
t.Fatal(err)
} else if err := mrun.Start(ctx); err != nil {
t.Fatal(err)
}
mlog.From(ctxA).Info("foo", ctxA)
mlog.From(ctxA).Debug("bar", ctxA)
massert.Fatal(t, massert.All(
massert.Len(msgs, 2),
massert.Equal(msgs[0].Level.String(), "INFO"),
massert.Equal(msgs[0].Description, "foo"),
massert.Equal(msgs[0].Contexts, []context.Context{ctxA}),
massert.Equal(msgs[1].Level.String(), "DEBUG"),
massert.Equal(msgs[1].Description, "bar"),
massert.Equal(msgs[1].Contexts, []context.Context{ctxA}),
))
})
}