Add explanatory comments to click and scroll actions

Author: rachelmcr

app/src/androidTest/java/org/wordpress/aztec/demo/BetterClickAction.java

@@ -39,6 +39,7 @@ public BetterClickAction(Tapper tapper, CoordinatesProvider coordinatesProvider,
     @Override
     @SuppressWarnings("unchecked")
     public Matcher<View> getConstraints() {
+        // Check that at least 65% of the element is displayed (instead of default 90%)
         Matcher<View> standardConstraint = isDisplayingAtLeast(65);
         if (rollbackAction.isPresent()) {
             return allOf(standardConstraint, rollbackAction.get().getConstraints());

app/src/androidTest/java/org/wordpress/aztec/demo/BetterScrollToAction.java

@@ -36,6 +36,7 @@ public Matcher<View> getConstraints() {
 
     @Override
     public void perform(UiController uiController, View view) {
+        // Check that at least 65% of the element is displayed (instead of default 90%)
         if (isDisplayingAtLeast(65).matches(view)) {
             Log.i(TAG, "View is already displayed. Returning.");
             return;
@@ -46,6 +47,7 @@ public void perform(UiController uiController, View view) {
             Log.w(TAG, "Scrolling to view was requested, but none of the parents scrolled.");
         }
         uiController.loopMainThreadUntilIdle();
+        // Check that at least 65% of the element is displayed (instead of default 90%)
         if (!isDisplayingAtLeast(65).matches(view)) {
             throw new PerformException.Builder()
                     .withActionDescription(this.getDescription())