[ReactNative] Ignore bad inputs to parseErrorStack

Libraries/JavaScriptAppEngine/Initialization/__tests__/parseErrorStack-test.js

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+
+require('mock-modules').autoMockOff();
+
+var parseErrorStack = require('parseErrorStack');
+
+function getFakeError() {
+  return new Error('Happy Cat');
+}
+
+describe('parseErrorStack', function() {
+
+  it('parses error stack', function() {
+    var stack = parseErrorStack(getFakeError());
+    expect(stack.length).toBeGreaterThan(0);
+
+    var firstFrame = stack[0];
+    expect(firstFrame.methodName).toEqual('getFakeError');
+    expect(firstFrame.file).toMatch(/parseErrorStack-test\.js$/);
+  });
+
+  it('supports framesToPop', function() {
+    function getWrappedError() {
+      var error = getFakeError();
+      error.framesToPop = 1;
+      return error;
+    }
+
+    // Make sure framesToPop == 1 causes it to ignore getFakeError
+    // stack frame
+    var stack = parseErrorStack(getWrappedError());
+    expect(stack[0].methodName).toEqual('getWrappedError');
+  });
+
+  it('ignores bad inputs', function() {
+    expect(parseErrorStack({})).toEqual([]);
+    expect(parseErrorStack(null)).toEqual([]);
+  });
+
+});

Libraries/JavaScriptAppEngine/Initialization/parseErrorStack.js

@@ -28,6 +28,10 @@ function resolveSourceMaps(sourceMapInstance, stackFrame) {
 }
 
 function parseErrorStack(e, sourceMapInstance) {
+  if (!e || !e.stack) {
+    return [];
+  }
+
   var stack = stacktraceParser.parse(e.stack);
 
   var framesToPop = e.framesToPop || 0;