Add exec package tests

Signed-off-by: Tobias Brumhard <[email protected]>

pkg/exec/command_group_test.go

@@ -0,0 +1,77 @@
+package exec_test
+
+import (
+	"errors"
+	"os/exec"
+	"testing"
+
+	ownexec "github.com/schwarzit/go-template/pkg/exec"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_CommandGroup_RunWith(t *testing.T) {
+	t.Run("no command is executed if prerun fails", func(t *testing.T) {
+		cg := ownexec.CommandGroup{
+			PreRun: func() error {
+				return errors.New("dummy")
+			},
+			Commands: []*exec.Cmd{
+				exec.Command("anything"),
+			},
+		}
+
+		anyCommandExecuted := false
+		err := cg.RunWith(ownexec.CmdRunnerFunc(func(cmd *exec.Cmd) (string, error) {
+			anyCommandExecuted = true
+			return "", nil
+		}))
+
+		require.Error(t, err)
+		require.False(t, anyCommandExecuted)
+	})
+	t.Run("all commands are executed if there's no error", func(t *testing.T) {
+		cg := ownexec.CommandGroup{
+			Commands: []*exec.Cmd{
+				exec.Command("anything"),
+				exec.Command("sthelse"),
+			},
+		}
+
+		anythingExecuted, sthelseExecuted := false, false
+		err := cg.RunWith(ownexec.CmdRunnerFunc(func(cmd *exec.Cmd) (string, error) {
+			switch cmd.Path {
+			case "anything":
+				anythingExecuted = true
+			case "sthelse":
+				sthelseExecuted = true
+			}
+			return "", nil
+		}))
+
+		require.NoError(t, err)
+		require.True(t, anythingExecuted)
+		require.True(t, sthelseExecuted)
+	})
+	t.Run("no commands are executed after the first one fails", func(t *testing.T) {
+		cg := ownexec.CommandGroup{
+			Commands: []*exec.Cmd{
+				exec.Command("anything"),
+				exec.Command("sthelse"),
+			},
+		}
+
+		sthelseExecuted := false
+		err := cg.RunWith(ownexec.CmdRunnerFunc(func(cmd *exec.Cmd) (string, error) {
+			switch cmd.Path {
+			case "anything":
+				return "", errors.New("dummy")
+			case "sthelse":
+				sthelseExecuted = true
+			}
+			return "", nil
+		}))
+
+		require.Error(t, err)
+		require.False(t, sthelseExecuted)
+	})
+}

pkg/exec/runner_test.go

@@ -0,0 +1,24 @@
+package exec_test
+
+import (
+	"os/exec"
+	"runtime"
+	"testing"
+
+	ownexec "github.com/schwarzit/go-template/pkg/exec"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_execCmdRunner_Run(t *testing.T) {
+	t.Run("error if command not found", func(t *testing.T) {
+		_, err := ownexec.NewExecCmdRunner().Run(exec.Command("does-not-exist"))
+		var errWithStderr *ownexec.ErrWithStderr
+		require.ErrorAs(t, err, &errWithStderr)
+		require.ErrorIs(t, err, exec.ErrNotFound)
+	})
+	t.Run("returns command's stdout", func(t *testing.T) {
+		output, err := ownexec.NewExecCmdRunner().Run(exec.Command("go", "version"))
+		require.NoError(t, err)
+		require.Contains(t, output, runtime.Version())
+	})
+}