1 files changed, 66 insertions, 0 deletions
diff --git a/internal/git2go/gob_test.go b/internal/git2go/gob_test.go
new file mode 100644
index 000000000..e18a10961
--- /dev/null
+++ b/internal/git2go/gob_test.go
@@ -0,0 +1,66 @@
+package git2go
+
+import (
+	"bytes"
+	"encoding/gob"
+	"errors"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSerializableError(t *testing.T) {
+	for _, tc := range []struct {
+		desc          string
+		input         error
+		output        error
+		containsTyped bool
+	}{
+		{
+			desc:   "plain error",
+			input:  errors.New("plain error"),
+			output: wrapError{Message: "plain error"},
+		},
+		{
+			desc:   "wrapped plain error",
+			input:  fmt.Errorf("error wrapper: %w", errors.New("plain error")),
+			output: wrapError{Message: "error wrapper: plain error", Err: wrapError{Message: "plain error"}},
+		},
+		{
+			desc:          "wrapped typed error",
+			containsTyped: true,
+			input:         fmt.Errorf("error wrapper: %w", InvalidArgumentError("typed error")),
+			output:        wrapError{Message: "error wrapper: typed error", Err: InvalidArgumentError("typed error")},
+		},
+		{
+			desc:          "typed wrapper",
+			containsTyped: true,
+			input: wrapError{
+				Message: "error wrapper: typed error 1: typed error 2",
+				Err: wrapError{
+					Message: "typed error 1: typed error 2",
+					Err:     InvalidArgumentError("typed error 2"),
+				},
+			},
+			output: wrapError{
+				Message: "error wrapper: typed error 1: typed error 2",
+				Err: wrapError{
+					Message: "typed error 1: typed error 2",
+					Err:     InvalidArgumentError("typed error 2"),
+				},
+			},
+		},
+	} {
+		t.Run(tc.desc, func(t *testing.T) {
+			encoded := &bytes.Buffer{}
+			require.NoError(t, gob.NewEncoder(encoded).Encode(SerializableError(tc.input)))
+			var err wrapError
+			require.NoError(t, gob.NewDecoder(encoded).Decode(&err))
+			require.Equal(t, tc.output, err)
+
+			var typedErr InvalidArgumentError
+			require.Equal(t, tc.containsTyped, errors.As(err, &typedErr))
+		})
+	}
+}