Further input test refactorings

osu.Framework.Tests/Input/KeyboardInputTest.cs

···
         }
 
         /// <summary>
-        /// Tests that if a drawable is removed from the hierarchy (or is otherwise removed from the input queues),
-        /// it won't receive an OnKeyDown() event for every subsequent repeat.
+        /// Tests that a drawable that is removed from the hierarchy (or is otherwise removed from the input queues) won't receive OnKeyDown() events for every subsequent repeat.
         /// </summary>
         [Test]
         public void TestNoLongerValidDrawableDoesNotReceiveRepeat()
···
             });
 
             AddStep("press key", () => InputManager.PressKey(Key.A));
+            AddUntilStep("wait for repeat on receptor 0", () => receptors[0].RepeatReceived);
 
             AddStep("remove receptor 0 & reset repeat", () =>
             {
···
         }
 
         /// <summary>
-        /// Tests that a drawable that was previously removed from the hierarchy receives OnKeyDown() for repeat events if the drawable previously received OnKeyDown().
+        /// Tests that a drawable that was previously removed from the hierarchy receives repeat OnKeyDown() events when re-added to the hierarchy,
+        /// if it previously received a non-repeat OnKeyDown() event.
         /// </summary>
         [Test]
         public void TestReValidatedDrawableReceivesRepeat()

osu.Framework.Tests/Input/MouseInputTest.cs

···
     public class MouseInputTest : ManualInputManagerTestScene
     {
         /// <summary>
-        /// Tests that if a drawable is removed from the hierarchy (or is otherwise removed from the input queues),
-        /// it won't receive an OnClick() event on mouse up.
+        /// Tests that a drawable that is removed from the hierarchy (or is otherwise removed from the input queues) does not receive an OnClick() event on mouse up.
         /// </summary>
         [Test]
         public void TestNoLongerValidDrawableDoesNotReceiveClick()
···
         }
 
         /// <summary>
-        /// Tests that a drawable that is removed and re-added to the hierarchy can still handle OnClick().
+        /// Tests that a drawable that is removed and re-added to the hierarchy still receives an OnClick() event.
         /// </summary>
         [Test]
         public void TestReValidatedDrawableReceivesClick()
···
             AddAssert("receptor 0 received click", () => receptors[0].ClickReceived);
         }
 
+        /// <summary>
+        /// Tests that a drawable that is removed from the hierarchy (or is otherwise removed from the input queues) does not receive an OnDoubleClick() event.
+        /// </summary>
         [Test]
         public void TestNoLongerValidDrawableDoesNotReceiveDoubleClick()
         {