Test YogaNode#getLayoutDirection()

Summary:
@public

Previously untested. Allows us to ship with more confidence

Reviewed By: SidharthGuglani

Differential Revision: D13534350

fbshipit-source-id: a2e7577befdeeb7a27148e16624eeb7a347efd87

java/tests/com/facebook/yoga/YogaNodeTest.java

@@ -432,6 +432,16 @@ public class YogaNodeTest {
     assertTrue(root.hasNewLayout());
   }
 
+  @Test
+  public void directionIsPassedThrough() {
+    YogaNode root = createNode();
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(root.getLayoutDirection(), YogaDirection.RTL);
+  }
+
   private YogaNode createNode() {
     return mNodeFactory.create();
   }