added basic java, csharp and javascript tests for reference baseline feature

Summary:
@public
We added a functionality using which child node can tell parent node to use it as a reference baseline.
Added some tests for java, csharp, javascript language bindings.

Reviewed By: davidaurelio

Differential Revision: D12997442

fbshipit-source-id: 4717167d2b3862bf2af87b663bda82f9c1eae33e

java/tests/com/facebook/yoga/YGAlignBaselineTest.java

@@ -0,0 +1,122 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+package com.facebook.yoga;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(Parameterized.class)
+public class YGAlignBaselineTest {
+  @Parameterized.Parameters(name = "{0}")
+  public static Iterable<TestParametrization.NodeFactory> nodeFactories() {
+    return TestParametrization.nodeFactories();
+  }
+
+  @Parameterized.Parameter public TestParametrization.NodeFactory mNodeFactory;
+
+  private YogaBaselineFunction getBaselineFunc() {
+    return new YogaBaselineFunction() {
+      @Override
+      public float baseline(YogaNode node, float width, float height) {
+        return height / 2;
+      }
+    };
+  }
+
+  @Test
+  public void test_align_baseline_parent_using_child_in_column_as_reference() {
+    YogaConfig config = new YogaConfig();
+
+    final YogaNode root = createYGNode(config, YogaFlexDirection.ROW, 1000f, 1000f, true);
+
+    final YogaNode root_child0 = createYGNode(config, YogaFlexDirection.COLUMN, 500f, 600f, false);
+    root.addChildAt(root_child0, 0);
+
+    final YogaNode root_child1 = createYGNode(config, YogaFlexDirection.COLUMN, 500f, 800f, false);
+    root.addChildAt(root_child1, 1);
+
+    final YogaNode root_child1_child0 =
+        createYGNode(config, YogaFlexDirection.COLUMN, 500f, 300f, false);
+    root_child1.addChildAt(root_child1_child0, 0);
+
+    final YogaNode root_child1_child1 =
+        createYGNode(config, YogaFlexDirection.COLUMN, 500f, 400f, false);
+    root_child1_child1.setBaselineFunction(getBaselineFunc());
+    root_child1_child1.setIsReferenceBaseline(true);
+    root_child1.addChildAt(root_child1_child1, 1);
+
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+
+    assertEquals(500f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child1.getLayoutY(), 0.0f);
+
+    assertEquals(0f, root_child1_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child1_child0.getLayoutY(), 0.0f);
+
+    assertEquals(0f, root_child1_child1.getLayoutX(), 0.0f);
+    assertEquals(300f, root_child1_child1.getLayoutY(), 0.0f);
+  }
+
+  @Test
+  public void test_align_baseline_parent_using_child_in_row_as_reference() {
+    YogaConfig config = new YogaConfig();
+
+    final YogaNode root = createYGNode(config, YogaFlexDirection.ROW, 1000f, 1000f, true);
+
+    final YogaNode root_child0 = createYGNode(config, YogaFlexDirection.COLUMN, 500f, 600f, false);
+    root.addChildAt(root_child0, 0);
+
+    final YogaNode root_child1 = createYGNode(config, YogaFlexDirection.ROW, 500f, 800f, true);
+    root.addChildAt(root_child1, 1);
+
+    final YogaNode root_child1_child0 =
+        createYGNode(config, YogaFlexDirection.COLUMN, 500f, 500f, false);
+    root_child1.addChildAt(root_child1_child0, 0);
+
+    final YogaNode root_child1_child1 =
+        createYGNode(config, YogaFlexDirection.COLUMN, 500f, 400f, false);
+    root_child1_child1.setBaselineFunction(getBaselineFunc());
+    root_child1_child1.setIsReferenceBaseline(true);
+    root_child1.addChildAt(root_child1_child1, 1);
+
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+
+    assertEquals(500f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child1.getLayoutY(), 0.0f);
+
+    assertEquals(0f, root_child1_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child1_child0.getLayoutY(), 0.0f);
+
+    assertEquals(500f, root_child1_child1.getLayoutX(), 0.0f);
+    assertEquals(300f, root_child1_child1.getLayoutY(), 0.0f);
+  }
+
+  private YogaNode createYGNode(
+      YogaConfig config,
+      YogaFlexDirection flexDirection,
+      float width,
+      float height,
+      boolean alignBaseline) {
+    YogaNode node = mNodeFactory.create(config);
+    node.setFlexDirection(flexDirection);
+    node.setWidth(width);
+    node.setHeight(height);
+    if (alignBaseline) {
+      node.setAlignItems(YogaAlign.BASELINE);
+    }
+    return node;
+  }
+}