1 files changed, 20 insertions, 0 deletions
diff --git a/internal/testgit/show.go b/internal/testgit/show.go
new file mode 100644
index 00000000..31acb9d3
--- /dev/null
+++ b/internal/testgit/show.go
@@ -0,0 +1,20 @@
+package testgit
+
+import (
+	"fmt"
+	"testing"
+
+	"lindenii.org/go/furgit/object/id"
+)
+
+// ShowFormat returns git-show output for one pretty format.
+func (repo *Repo) ShowFormat(tb testing.TB, oid id.ObjectID, format string) ([]byte, error) {
+	tb.Helper()
+
+	stdout, err := repo.Run(tb, nil, "git", "show", "--no-patch", "--no-color", "--format="+format, oid.String())
+	if err != nil {
+		return nil, fmt.Errorf("show --format=%q %s: %w", format, oid, err)
+	}
+
+	return stdout, nil
+}