rewrite: add minimal test

cmd/restic/integration_rewrite_test.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"path/filepath"
+	"testing"
+
+	rtest "github.com/restic/restic/internal/test"
+)
+
+func testRunRewriteExclude(t testing.TB, gopts GlobalOptions, excludes []string) {
+	opts := RewriteOptions{
+		excludePatternOptions: excludePatternOptions{
+			Excludes: excludes,
+		},
+	}
+
+	rtest.OK(t, runRewrite(opts, gopts, nil))
+}
+
+func TestRewrite(t *testing.T) {
+	env, cleanup := withTestEnvironment(t)
+	defer cleanup()
+
+	testSetupBackupData(t, env)
+
+	// create backup
+	testRunBackup(t, filepath.Dir(env.testdata), []string{"testdata"}, BackupOptions{}, env.gopts)
+	snapshotIDs := testRunList(t, "snapshots", env.gopts)
+	rtest.Assert(t, len(snapshotIDs) == 1, "expected one snapshot, got %v", snapshotIDs)
+	testRunCheck(t, env.gopts)
+
+	// exclude some data
+	testRunRewriteExclude(t, env.gopts, []string{"3"})
+	snapshotIDs = testRunList(t, "snapshots", env.gopts)
+	rtest.Assert(t, len(snapshotIDs) == 2, "expected two snapshots, got %v", snapshotIDs)
+	testRunCheck(t, env.gopts)
+}