Log test's stacktrace; wait for TextFlow in each nested test class

Author: JordanMartinez

.travis.yml

@@ -36,7 +36,7 @@ before_script:
 
 script:
   - gradle assemble
-  - gradle check
+  - gradle check --stacktrace
 
 # See https://docs.travis-ci.com/user/languages/java/#Caching
 before_cache:

richtextfx/src/integrationTest/java/org/fxmisc/richtext/keyboard/NavigationTests.java

@@ -262,18 +262,18 @@ public void start(Stage stage) throws Exception {
             );
         }
 
-        @Before
-        public void setup() throws TimeoutException {
-            // When the stage's width changes, TextFlow does not properly handle API calls to a
-            //  multi-line paragraph immediately. So, wait until it correctly responds
-            //  to the stage width change
-            WaitForAsyncUtils.waitFor(5, TimeUnit.SECONDS,
-                    () -> area.getParagraphLinesCount(0) == lines.length
-            );
-        }
-
         public class NoModifiers {
 
+            @Before
+            public void setup() throws TimeoutException {
+                // When the stage's width changes, TextFlow does not properly handle API calls to a
+                //  multi-line paragraph immediately. So, wait until it correctly responds
+                //  to the stage width change
+                WaitForAsyncUtils.waitFor(5, TimeUnit.SECONDS,
+                        () -> area.getParagraphLinesCount(0) == lines.length
+                );
+            }
+
             @Test
             public void up() {
                 moveCaretTo(lineStart(2));
@@ -323,7 +323,14 @@ public void end() {
         public class ShortcutDown {
 
             @Before
-            public void setup() {
+            public void setup() throws TimeoutException {
+                // When the stage's width changes, TextFlow does not properly handle API calls to a
+                //  multi-line paragraph immediately. So, wait until it correctly responds
+                //  to the stage width change
+                WaitForAsyncUtils.waitFor(5, TimeUnit.SECONDS,
+                        () -> area.getParagraphLinesCount(0) == lines.length
+                );
+
                 press(SHORTCUT);
             }
 
@@ -377,7 +384,14 @@ public void end() {
         public class ShiftDown {
 
             @Before
-            public void setup() {
+            public void setup() throws TimeoutException {
+                // When the stage's width changes, TextFlow does not properly handle API calls to a
+                //  multi-line paragraph immediately. So, wait until it correctly responds
+                //  to the stage width change
+                WaitForAsyncUtils.waitFor(5, TimeUnit.SECONDS,
+                        () -> area.getParagraphLinesCount(0) == lines.length
+                );
+
                 press(SHIFT);
             }
 
@@ -430,7 +444,14 @@ public void end() {
         public class ShortcutShiftDown {
 
             @Before
-            public void setup() {
+            public void setup() throws TimeoutException {
+                // When the stage's width changes, TextFlow does not properly handle API calls to a
+                //  multi-line paragraph immediately. So, wait until it correctly responds
+                //  to the stage width change
+                WaitForAsyncUtils.waitFor(5, TimeUnit.SECONDS,
+                        () -> area.getParagraphLinesCount(0) == lines.length
+                );
+
                 press(SHORTCUT, SHIFT);
             }