1 files changed, 35 insertions, 0 deletions
diff --git a/internal/testgit/repo_from_fixture.go b/internal/testgit/repo_from_fixture.go
new file mode 100644
index 00000000..887bf9a3
--- /dev/null
+++ b/internal/testgit/repo_from_fixture.go
@@ -0,0 +1,35 @@
+package testgit
+
+import (
+	"io/fs"
+	"os"
+	"testing"
+
+	"codeberg.org/lindenii/furgit/objectid"
+)
+
+// NewRepoFromFixture copies one existing repository fixture into a temp dir.
+func NewRepoFromFixture(tb testing.TB, algo objectid.Algorithm, fixtureDir string) *TestRepo {
+	tb.Helper()
+
+	if algo.Size() == 0 {
+		tb.Fatalf("invalid algorithm: %v", algo)
+	}
+
+	dst := tb.TempDir()
+	srcFS := os.DirFS(fixtureDir)
+	err := copyFS(dst, srcFS)
+	if err != nil {
+		tb.Fatalf("copy fixture %q: %v", fixtureDir, err)
+	}
+
+	return &TestRepo{
+		dir:  dst,
+		algo: algo,
+		env:  defaultEnv(),
+	}
+}
+
+func copyFS(dst string, src fs.FS) error {
+	return os.CopyFS(dst, src)
+}