Move cli/cmd into cli/internal

cli/internal/cmd/userinteraction_test.go

@@ -0,0 +1,63 @@
+package cmd
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAskToConfirm(t *testing.T) {
+	// errAborted is an error where the user aborted the action.
+	errAborted := errors.New("user aborted")
+
+	cmd := &cobra.Command{
+		Use:  "test",
+		Args: cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			ok, err := askToConfirm(cmd, "777")
+			if err != nil {
+				return err
+			}
+			if !ok {
+				return errAborted
+			}
+			return nil
+		},
+	}
+
+	testCases := map[string]struct {
+		input   string
+		wantErr error
+	}{
+		"user confirms":                       {"y\n", nil},
+		"user confirms long":                  {"yes\n", nil},
+		"user disagrees":                      {"n\n", errAborted},
+		"user disagrees long":                 {"no\n", errAborted},
+		"user is first unsure, but agrees":    {"what?\ny\n", nil},
+		"user is first unsure, but disagrees": {"wait.\nn\n", errAborted},
+		"repeated invalid input":              {"h\nb\nq\n", ErrInvalidInput},
+	}
+
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+
+			out := &bytes.Buffer{}
+			cmd.SetOut(out)
+			cmd.SetErr(&bytes.Buffer{})
+			in := bytes.NewBufferString(tc.input)
+			cmd.SetIn(in)
+
+			err := cmd.Execute()
+			assert.ErrorIs(err, tc.wantErr)
+
+			output, err := io.ReadAll(out)
+			assert.NoError(err)
+			assert.Contains(string(output), "777")
+		})
+	}
+}