1 files changed, 59 insertions, 0 deletions
diff --git a/spec/frontend/sentry/sentry_browser_wrapper_spec.js b/spec/frontend/sentry/sentry_browser_wrapper_spec.js
new file mode 100644
index 00000000000..f4d646bab78
--- /dev/null
+++ b/spec/frontend/sentry/sentry_browser_wrapper_spec.js
@@ -0,0 +1,59 @@
+import * as Sentry from '~/sentry/sentry_browser_wrapper';
+
+const mockError = new Error('error!');
+const mockMsg = 'msg!';
+const mockFn = () => {};
+
+describe('SentryBrowserWrapper', () => {
+  afterEach(() => {
+    // eslint-disable-next-line no-underscore-dangle
+    delete window._Sentry;
+  });
+
+  describe('when _Sentry is not defined', () => {
+    it('methods fail silently', () => {
+      expect(() => {
+        Sentry.captureException(mockError);
+        Sentry.captureMessage(mockMsg);
+        Sentry.withScope(mockFn);
+      }).not.toThrow();
+    });
+  });
+
+  describe('when _Sentry is defined', () => {
+    let mockCaptureException;
+    let mockCaptureMessage;
+    let mockWithScope;
+
+    beforeEach(async () => {
+      mockCaptureException = jest.fn();
+      mockCaptureMessage = jest.fn();
+      mockWithScope = jest.fn();
+
+      // eslint-disable-next-line no-underscore-dangle
+      window._Sentry = {
+        captureException: mockCaptureException,
+        captureMessage: mockCaptureMessage,
+        withScope: mockWithScope,
+      };
+    });
+
+    it('captureException is called', () => {
+      Sentry.captureException(mockError);
+
+      expect(mockCaptureException).toHaveBeenCalledWith(mockError);
+    });
+
+    it('captureMessage is called', () => {
+      Sentry.captureMessage(mockMsg);
+
+      expect(mockCaptureMessage).toHaveBeenCalledWith(mockMsg);
+    });
+
+    it('withScope is called', () => {
+      Sentry.withScope(mockFn);
+
+      expect(mockWithScope).toHaveBeenCalledWith(mockFn);
+    });
+  });
+});