[js] "fix" actions tests for chrome by wrapping spec in an extra desc…

…ribe block.

This appears to be necessary for the afterEach hook to properly
run and clear action state between tests. This appears to be a timing
issue around mocha and not a problem with the driver itself: adding
an extra `driver.actions().clear()` call directly to the test seemed
to work.

I should dig into this more, but this test gets things passing without
unnecessarily slowing things down (to launch a new browser session)
or introducing too big of a hack.

javascript/node/selenium-webdriver/test/actions_test.js

@@ -102,22 +102,29 @@ test.suite(function(env) {
       assert.equal(await box.getAttribute('class'), 'blue');
     });
 
-    it('dragAndDrop()', async function() {
-      await driver.get(fileServer.whereIs('/data/actions/drag.html'));
-
-      let slide = await driver.findElement(By.id('slide'));
-      assert.equal(await slide.getCssValue('left'), '0px');
-      assert.equal(await slide.getCssValue('top'), '0px');
-
-      let br = await driver.findElement(By.id('BR'));
-      await driver.actions({bridge: true}).dragAndDrop(slide, br).perform();
-      assert.equal(await slide.getCssValue('left'), '206px');
-      assert.equal(await slide.getCssValue('top'), '206px');
-
-      let tr = await driver.findElement(By.id('TR'));
-      await driver.actions({bridge: true}).dragAndDrop(slide, tr).perform();
-      assert.equal(await slide.getCssValue('left'), '206px');
-      assert.equal(await slide.getCssValue('top'), '1px');
+    // For some reason for Chrome 75 we need to wrap this test in an extra
+    // describe for the afterEach hook above to properly clear action sequences.
+    // This appears to be a quirk of the timing around mocha tests and not
+    // necessarily a bug in the chromedriver.
+    // TODO(jleyba): dig into this more so we can remove this hack.
+    describe('dragAndDrop()', function() {
+      it('', async function() {
+        await driver.get(fileServer.whereIs('/data/actions/drag.html'));
+
+        let slide = await driver.findElement(By.id('slide'));
+        assert.equal(await slide.getCssValue('left'), '0px');
+        assert.equal(await slide.getCssValue('top'), '0px');
+
+        let br = await driver.findElement(By.id('BR'));
+        await driver.actions({bridge: true}).dragAndDrop(slide, br).perform();
+        assert.equal(await slide.getCssValue('left'), '206px');
+        assert.equal(await slide.getCssValue('top'), '206px');
+
+        let tr = await driver.findElement(By.id('TR'));
+        await driver.actions({bridge: true}).dragAndDrop(slide, tr).perform();
+        assert.equal(await slide.getCssValue('left'), '206px');
+        assert.equal(await slide.getCssValue('top'), '1px');
+      });
     });
 
     it('move()', async function() {