diff --git a/lms/static/js/spec/courseware/bridge_spec.js b/lms/static/js/spec/courseware/bridge_spec.js
new file mode 100644
index 000000000000..c30d64e999a9
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+++ b/lms/static/js/spec/courseware/bridge_spec.js
@@ -0,0 +1,98 @@
+describe('JS bridge for communication between native mobile apps and the xblock', function() {
+
+  beforeEach(function() {
+    // Mock objects for IOS and Android bridges
+    window.webkit = {
+      messageHandlers: {
+        IOSBridge: {
+          postMessage: jasmine.createSpy('postMessage')
+        }
+      }
+    };
+    window.AndroidBridge = {
+      postMessage: jasmine.createSpy('postMessage')
+    };
+  });
+
+  describe('sendMessageToIOS', function() {
+    it('should call postMessage on IOSBridge with the correct message', function() {
+      const message = JSON.stringify({answer: 'test'});
+      sendMessageToIOS(message);
+      expect(window.webkit.messageHandlers.IOSBridge.postMessage).toHaveBeenCalledWith(message);
+    });
+  });
+
+  describe('sendMessageToAndroid', function() {
+    it('should call postMessage on AndroidBridge with the correct message', function() {
+      const message = JSON.stringify({answer: 'test'});
+      sendMessageToAndroid(message);
+      expect(window.AndroidBridge.postMessage).toHaveBeenCalledWith(message);
+    });
+  });
+
+  describe('markProblemCompleted', function() {
+    it('should correctly parse the message and update the DOM elements', function() {
+      const message = JSON.stringify({
+        data: 'input1=answer1&input2=answer2'
+      });
+      const problemContainer = $('<div class="xblock-student_view">' +
+        '<div class="submit-attempt-container">' +
+        '<button class="submit"></button>' +
+        '</div>' +
+        '<div class="notification-gentle-alert">' +
+        '<div class="notification-message"></div>' +
+        '</div>' +
+        '<input id="input1">' +
+        '<input id="input2">' +
+        '<input id="answer1">' +
+        '<input id="answer2">' +
+        '</div>');
+      $('body').append(problemContainer);
+
+      markProblemCompleted(message);
+
+      expect(problemContainer.find('.submit-attempt-container .submit').attr('disabled')).toBe('disabled');
+      expect(problemContainer.find('.notification-gentle-alert .notification-message').html()).toBe('Answer submitted.');
+      expect(problemContainer.find('.notification-gentle-alert').css('display')).not.toBe('none');
+      expect(problemContainer.find('#input1').val()).toBe('answer1');
+      expect(problemContainer.find('#input2').val()).toBe('answer2');
+      expect(problemContainer.find('#answer1').prop('disabled')).toBe(true);
+      expect(problemContainer.find('#answer2').prop('disabled')).toBe(true);
+
+      problemContainer.remove();
+    });
+  });
+
+  describe('$.ajax', function() {
+    beforeEach(function() {
+      spyOn($, 'ajax').and.callThrough();
+    });
+
+    it('should intercept the request to problem_check and send data to the native apps', function() {
+      const ajaxOptions = {
+        url: 'http://example.com/problem_check',
+        data: {answer: 'test'}
+      };
+
+      $.ajax(ajaxOptions);
+
+      expect(window.webkit.messageHandlers.IOSBridge.postMessage).toHaveBeenCalledWith(JSON.stringify(ajaxOptions));
+      expect(window.AndroidBridge.postMessage).toHaveBeenCalledWith(JSON.stringify(ajaxOptions));
+    });
+
+    it('should call the original $.ajax function', function() {
+      const ajaxOptions = {
+        url: 'http://example.com/problem_check',
+        data: {answer: 'test'}
+      };
+
+      const originalAjax = spyOn($, 'ajax').and.callFake(function(options) {
+        return originalAjax.and.callThrough().call(this, options);
+      });
+
+      $.ajax(ajaxOptions);
+
+      expect(originalAjax).toHaveBeenCalledWith(ajaxOptions);
+    });
+  });
+});