local: Add layout tests

src/restic/backend/local/local_layout_test.go

@@ -0,0 +1,43 @@
+package local
+
+import (
+	"path/filepath"
+	. "restic/test"
+	"testing"
+)
+
+func TestLocalLayout(t *testing.T) {
+	path, cleanup := TempDir(t)
+	defer cleanup()
+
+	var tests = []struct {
+		filename        string
+		layout          string
+		failureExpected bool
+	}{
+		{"repo-layout-local.tar.gz", "", false},
+		{"repo-layout-cloud.tar.gz", "", false},
+		{"repo-layout-s3-old.tar.gz", "", false},
+	}
+
+	for _, test := range tests {
+		t.Run(test.filename, func(t *testing.T) {
+			SetupTarTestFixture(t, path, filepath.Join("..", "testdata", test.filename))
+
+			repo := filepath.Join(path, "repo")
+			be, err := Open(Config{
+				Path:   repo,
+				Layout: test.layout,
+			})
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if be == nil {
+				t.Fatalf("Open() returned nil but no error")
+			}
+
+			RemoveAll(t, filepath.Join(path, "repo"))
+		})
+	}
+}