Add nav to My Shots test. (mozilla-services#4030)

test/test.js

@@ -281,4 +281,29 @@ describe("Test Screenshots", function() {
     });
   });
 
+  it("should navigate to My Shots", function() {
+    return driver.get(backend).then(() => {
+      return startScreenshots(driver);
+    }).then(() => {
+      return driver.wait(
+        until.ableToSwitchToFrame(By.id(PRESELECTION_IFRAME_ID))
+      );
+    }).then(() => {
+      return driver.wait(
+        until.elementLocated(By.css(".myshots-button"))
+      );
+    }).then(myShotsButton => {
+      myShotsButton.click();
+      return setTimeoutPromise(500);
+    }).then(() => {
+      return driver.getAllWindowHandles();
+    }).then(tabs => {
+      return driver.switchTo().window(tabs[tabs.length - 1]);
+    }).then(() => {
+      return driver.getCurrentUrl();
+    }).then(url => {
+      assert.equal(url, `${backend}/shots`, `Navigated to ${url} instead of My Shots at ${backend}/shots`);
+    });
+  });
+
 });