mirror of
https://github.com/zrepl/zrepl.git
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90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
package zfscmd
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import (
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"bufio"
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"bytes"
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"context"
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"io"
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"os/exec"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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const testBin = "./zfscmd_platform_test.bash"
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func TestCmdStderrBehaviorOutput(t *testing.T) {
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stdout, err := exec.Command(testBin, "0").Output()
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require.NoError(t, err)
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require.Equal(t, []byte("to stdout\n"), stdout)
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stdout, err = exec.Command(testBin, "1").Output()
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assert.Equal(t, []byte("to stdout\n"), stdout)
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require.Error(t, err)
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ee, ok := err.(*exec.ExitError)
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require.True(t, ok)
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require.Equal(t, ee.Stderr, []byte("to stderr\n"))
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}
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func TestCmdStderrBehaviorCombinedOutput(t *testing.T) {
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stdio, err := exec.Command(testBin, "0").CombinedOutput()
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require.NoError(t, err)
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require.Equal(t, "to stderr\nto stdout\n", string(stdio))
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stdio, err = exec.Command(testBin, "1").CombinedOutput()
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require.Equal(t, "to stderr\nto stdout\n", string(stdio))
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require.Error(t, err)
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ee, ok := err.(*exec.ExitError)
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require.True(t, ok)
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require.Empty(t, ee.Stderr) // !!!! maybe not what one would expect
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}
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func TestCmdStderrBehaviorStdoutPipe(t *testing.T) {
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cmd := exec.Command(testBin, "1")
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stdoutPipe, err := cmd.StdoutPipe()
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require.NoError(t, err)
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err = cmd.Start()
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require.NoError(t, err)
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defer cmd.Wait()
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var stdout bytes.Buffer
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_, err = io.Copy(&stdout, stdoutPipe)
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require.NoError(t, err)
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require.Equal(t, "to stdout\n", stdout.String())
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err = cmd.Wait()
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require.Error(t, err)
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ee, ok := err.(*exec.ExitError)
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require.True(t, ok)
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require.Empty(t, ee.Stderr) // !!!!! probably not what one would expect if we only redirect stdout
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}
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func TestCmdProcessState(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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cmd := exec.CommandContext(ctx, "bash", "-c", "echo running; sleep 3600")
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stdout, err := cmd.StdoutPipe()
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require.NoError(t, err)
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err = cmd.Start()
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require.NoError(t, err)
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r := bufio.NewReader(stdout)
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line, err := r.ReadString('\n')
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require.NoError(t, err)
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require.Equal(t, "running\n", line)
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// we know it's running and sleeping
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cancel()
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err = cmd.Wait()
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t.Logf("wait err %T\n%s", err, err)
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require.Error(t, err)
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ee, ok := err.(*exec.ExitError)
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require.True(t, ok)
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require.NotNil(t, ee.ProcessState)
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require.Contains(t, ee.Error(), "killed")
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}
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