feat(ngMock/$exceptionHandler): log errors when rethrowing

Now the `rethrow` mode will also record a log of the error in the same
way as the `log` mode.

Closes #10540
Closes #10564

Author: DavidSouther

src/ngMock/angular-mocks.js

@@ -243,31 +243,31 @@ angular.mock.$ExceptionHandlerProvider = function() {
    *
    * @param {string} mode Mode of operation, defaults to `rethrow`.
    *
-   *   - `rethrow`: If any errors are passed to the handler in tests, it typically means that there
-   *                is a bug in the application or test, so this mock will make these tests fail.
    *   - `log`: Sometimes it is desirable to test that an error is thrown, for this case the `log`
    *            mode stores an array of errors in `$exceptionHandler.errors`, to allow later
    *            assertion of them. See {@link ngMock.$log#assertEmpty assertEmpty()} and
    *            {@link ngMock.$log#reset reset()}
+   *   - `rethrow`: If any errors are passed to the handler in tests, it typically means that there
+   *                is a bug in the application or test, so this mock will make these tests fail.
+   *                For any implementations that expect exceptions to be thrown, the `rethrow` mode
+   *                will also maintain a log of thrown errors.
    */
   this.mode = function(mode) {
+
     switch (mode) {
-      case 'rethrow':
-        handler = function(e) {
-          throw e;
-        };
-        break;
       case 'log':
+      case 'rethrow':
         var errors = [];
-
         handler = function(e) {
           if (arguments.length == 1) {
             errors.push(e);
           } else {
             errors.push([].slice.call(arguments, 0));
           }
+          if (mode === "rethrow") {
+            throw e;
+          }
         };
-
         handler.errors = errors;
         break;
       default:

test/ngMock/angular-mocksSpec.js

@@ -605,6 +605,19 @@ describe('ngMock', function() {
       });
     });
 
+    it('should log and rethrow exceptions', function() {
+      module(function($exceptionHandlerProvider) {
+        $exceptionHandlerProvider.mode('rethrow');
+      });
+      inject(function($exceptionHandler) {
+        expect(function() { $exceptionHandler('MyError'); }).toThrow('MyError');
+        expect($exceptionHandler.errors).toEqual(['MyError']);
+
+        expect(function() { $exceptionHandler('MyError', 'comment'); }).toThrow('MyError');
+        expect($exceptionHandler.errors[1]).toEqual(['MyError', 'comment']);
+      });
+    });
+
     it('should throw on wrong argument', function() {
       module(function($exceptionHandlerProvider) {
         expect(function() {