go-simpleexec/cmd_test.go at master · gurupras/go-simpleexec · GitHub

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package simpleexec

import (
	"bytes"
	"fmt"
	"testing"
	"time"

	"github.com/stretchr/testify/require"
)

func TestCmd(t *testing.T) {
	require := require.New(t)

	testString := "this is a test string"

	cmd := ParseCmd(fmt.Sprintf("echo -n '%v'", testString))
	require.NotNil(cmd)
	buf := bytes.NewBuffer(nil)
	cmd.Stdout = buf

	err := cmd.Start()
	require.Nil(err)

	err = cmd.Wait()
	require.Nil(err)

	require.Equal(testString, buf.String())
}

func TestBadCmd(t *testing.T) {
	require := require.New(t)

	cmd := ParseCmd(fmt.Sprintf("echoa 'Hello"))
	require.Nil(cmd)
}

func TestPipe(t *testing.T) {
	require := require.New(t)

	testString := "this is a test 'string'"
	cmd := ParseCmd(fmt.Sprintf(`echo -n "%v"`, testString))
	require.NotNil(cmd)

	pipedCmd := cmd.Pipe("sed -e 's/this is //g'")
	require.NotNil(pipedCmd)

	buf := bytes.NewBuffer(nil)
	pipedCmd.Stdout = buf

	err := pipedCmd.Start()
	require.Nil(err)

	err = pipedCmd.Wait()
	require.Nil(err)

	require.Equal("a test 'string'", buf.String())
}

func TestComplexPipe(t *testing.T) {
	require := require.New(t)

	testString := "this is a test 'string'"
	cmd := ParseCmd(fmt.Sprintf(`echo -n "%v"`, testString))
	require.NotNil(cmd)

	pipedCmd := cmd.Pipe("sed -e 's/this is //g'").
		Pipe(`sed -e "s/ 'string'//g"`).
		Pipe(`sed -e "s/a /ab /g"`).
		Pipe("wc -c")
	require.NotNil(pipedCmd)

	buf := bytes.NewBuffer(nil)
	pipedCmd.Stdout = buf

	err := pipedCmd.Start()
	require.Nil(err)

	err = pipedCmd.Wait()
	require.Nil(err)

	require.Equal("7\n", buf.String())
}

//FIXME: Currently requires manually checking for zombies
func TestForZombies(t *testing.T) {
	start := time.Now()
	for {
		now := time.Now()
		if now.Sub(start) > 2*time.Second {
			break
		}
		TestComplexPipe(t)
		time.Sleep(100 * time.Millisecond)
	}
}

//TODO: Add more complex testing for parent error and child error
func TestWaitError(t *testing.T) {
	require := require.New(t)

	// First test single command error
	cmd := ParseCmd("/bin/false")
	require.NotNil(cmd)

	buf := bytes.NewBuffer(nil)
	cmd.Stdout = buf

	err := cmd.Start()
	require.Nil(err)

	err = cmd.Wait()
	require.NotNil(err)
}

func TestSu(t *testing.T) {
	require := require.New(t)

	buf := bytes.NewBuffer(nil)
	cmd := ParseCmd("/bin/su -c 'ls' - guru")
	cmd.Stdout = buf
	require.NotNil(cmd)
	cmd.Start()
	cmd.Wait()

	fmt.Println(buf.String())
}