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cli_test.go

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package cli

import (

"bytes"

"context"

"os"

"testing"

"time"

"github.com/stretchr/testify/assert"

"github.com/stretchr/testify/require"

)

func expectFileContent(t *testing.T, file, got string) {

data, err := os.ReadFile(file)

// Ignore windows line endings

data = bytes.ReplaceAll(data, []byte("\r\n"), []byte("\n"))

r := require.New(t)

r.NoError(err)

r.Equal(got, string(data))

}

func buildTestContext(t *testing.T) context.Context {

ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)

t.Cleanup(cancel)

return ctx

}

func TestTracing(t *testing.T) {

olderr := os.Stderr

oldtracing := isTracingOn

defer func() {

os.Stderr = olderr

isTracingOn = oldtracing

}()

file, err := os.CreateTemp(os.TempDir(), "cli*")

assert.NoError(t, err)

os.Stderr = file

// Note we can't really set the env since the isTracingOn

// is read at module startup so any changes mid code

// won't take effect

isTracingOn = false

tracef("something")

isTracingOn = true

tracef("foothing")

assert.NoError(t, file.Close())

b, err := os.ReadFile(file.Name())

assert.NoError(t, err)

assert.Contains(t, string(b), "foothing")

assert.NotContains(t, string(b), "something")

}