Fuzzing of dart:io Directory API.

tests/standalone/io/file_fuzz_test.dart

Index: tests/standalone/io/file_fuzz_test.dart
diff --git a/tests/standalone/io/file_fuzz_test.dart b/tests/standalone/io/file_fuzz_test.dart
index f13529925b51db2d9769c3250d76c03ed484e1b6..52afa376fbc52547026704b62edacb1f2ab226f1 100644
--- a/tests/standalone/io/file_fuzz_test.dart
+++ b/tests/standalone/io/file_fuzz_test.dart
@@ -8,57 +8,7 @@
 #import('dart:io');
 #import('dart:isolate');
 
-final typeMapping = const {
-  'null': null,
-  'int': 0,
-  'bigint': 18446744073709551617,
-  'String': 'a',
-  'FileMode': FileMode.READ,
-  'num': 0.50,
-  'List<int>': const [1, 2, 3],
-  'Map<String, int>': const { "a": 23 }
-};
-
-typePermutations(int argCount) {
-  var result = [];
-  if (argCount == 2) {
-    typeMapping.forEach((k, v) {
-      typeMapping.forEach((k2, v2) {
-        result.add([v, v2]);
-      });
-    });
-  } else {
-    Expect.isTrue(argCount == 3);
-    typeMapping.forEach((k, v) {
-      typeMapping.forEach((k2, v2) {
-        typeMapping.forEach((k3, v3) {
-          result.add([v, v2, v3]);
-        });
-      });
-    });
-  }
-  return result;
-}
-
-// Perform sync operation and ignore all exceptions.
-doItSync(Function f) {
-  try { f(); } catch (var e) {}
-}
-
-// Perform async operation and transform the future for the operation
-// into a future that never fails by treating errors as normal
-// completion.
-Future doItAsync(Function f) {
-  // Ignore value and errors.
-  var completer = new Completer();
-  var future = f();
-  future.handleException((e) {
-    completer.complete(true);
-    return true;
-  });
-  future.then((v) => completer.complete(true));
-  return completer.future;
-}
+#import('fuzz_support.dart');
 
 fuzzSyncMethods() {
   typeMapping.forEach((k, v) {