testgit: Add test harnesses

1 files changed, 18 insertions, 0 deletions

diff --git a/internal/testgit/repo_hash_object.go b/internal/testgit/repo_hash_object.go
new file mode 100644
index 00000000..97a86be5
--- /dev/null
+++ b/internal/testgit/repo_hash_object.go
@@ -0,0 +1,18 @@
+package testgit
+
+import (
+	"testing"
+
+	"codeberg.org/lindenii/furgit/oid"
+)
+
+// HashObject hashes and writes an object and returns its object ID.
+func (repo *TestRepo) HashObject(tb testing.TB, objType string, body []byte) oid.ObjectID {
+	tb.Helper()
+	hex := repo.RunInput(tb, body, "hash-object", "-t", objType, "-w", "--stdin")
+	id, err := oid.ParseHex(repo.algo, hex)
+	if err != nil {
+		tb.Fatalf("parse git hash-object output %q: %v", hex, err)
+	}
+	return id
+}