65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
// Package mtest implements functionality useful for testing.
|
|
package mtest
|
|
|
|
import (
|
|
"context"
|
|
"testing"
|
|
|
|
"github.com/mediocregopher/mediocre-go-lib/mcfg"
|
|
"github.com/mediocregopher/mediocre-go-lib/mlog"
|
|
"github.com/mediocregopher/mediocre-go-lib/mrun"
|
|
)
|
|
|
|
type envCtxKey int
|
|
|
|
// Context creates and returns a root Context suitable for testing.
|
|
func Context() context.Context {
|
|
ctx := context.Background()
|
|
logger := mlog.NewLogger()
|
|
logger.SetMaxLevel(mlog.DebugLevel)
|
|
return mlog.WithLogger(ctx, logger)
|
|
}
|
|
|
|
// WithEnv sets the given environment variable on the given Context, such that
|
|
// it will be used as if it was a real environment variable when the Run
|
|
// function from this package is called.
|
|
func WithEnv(ctx context.Context, key, val string) context.Context {
|
|
prevEnv, _ := ctx.Value(envCtxKey(0)).([][2]string)
|
|
env := make([][2]string, len(prevEnv), len(prevEnv)+1)
|
|
copy(env, prevEnv)
|
|
env = append(env, [2]string{key, val})
|
|
return context.WithValue(ctx, envCtxKey(0), env)
|
|
}
|
|
|
|
// Run performs the following using the given Context:
|
|
//
|
|
// - Calls mcfg.Populate using any variables set by WithEnv.
|
|
//
|
|
// - Calls mrun.Start
|
|
//
|
|
// - Calls the passed in body callback.
|
|
//
|
|
// - Calls mrun.Stop
|
|
//
|
|
// The intention is that Run is used within a test on a Context created via
|
|
// NewCtx, after any setup functions have been called (e.g. mnet.WithListener).
|
|
func Run(ctx context.Context, t *testing.T, body func()) {
|
|
envTups, _ := ctx.Value(envCtxKey(0)).([][2]string)
|
|
env := make([]string, 0, len(envTups))
|
|
for _, tup := range envTups {
|
|
env = append(env, tup[0]+"="+tup[1])
|
|
}
|
|
|
|
if err := mcfg.Populate(ctx, mcfg.SourceEnv{Env: env}); err != nil {
|
|
t.Fatal(err)
|
|
} else if err := mrun.Start(ctx); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
body()
|
|
|
|
if err := mrun.Stop(ctx); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|