Let gentest properly create *Auto methods for sizes (#1719)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1719

Right now there is no way to test fixtures with `auto` widths, heights, or flex basis - even though we expose those functions. I updated gentest to generate those functions. Notably, position and margin (the other auto-able props) already account for this.

 I also created `YGAutoTest.html` to test this. Not really testing the capabilities of `auto` here, just if we can create a test about it.

Reviewed By: NickGerleman

Differential Revision: D64125522

fbshipit-source-id: 291ec82003cf53f99c21943142a63e2ef30402a5

gentest/fixtures/YGAutoTest.html

@@ -0,0 +1,25 @@
+<div id="auto_width" style="width: auto; height: 50px; flex-direction: row;">
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+</div>
+
+<div id="auto_height" style="width: 50px; height: auto;">
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+</div>
+
+<div id="auto_flex_basis" style="width: 50px; flex-basis: auto;">
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+  <div style="width: 50px; height: 50px"></div>
+</div>
+
+<div id="auto_position" style="width: 50px; height: 50px;">
+  <div style="width: 25px; height: 25px; right: auto"></div>
+</div>
+
+<div id="auto_margin" style="width: 50px; height: 50px;">
+  <div style="width: 25px; height: 25px; margin-left: auto"></div>
+</div>

gentest/gentest-cpp.js

@@ -12,7 +12,7 @@ function toValueCpp(value) {
   return n + (Number(n) == n && n % 1 !== 0 ? 'f' : '');
 }
 
-function toFunctionName(value) {
+function toFunctionNameCpp(value) {
   if (value.indexOf('%') >= 0) {
     return 'Percent';
   } else if (value.indexOf('Auto') >= 0) {
@@ -21,6 +21,23 @@ function toFunctionName(value) {
   return '';
 }
 
+function keywordFunctionCpp(functionPrefix, nodeName, value) {
+  const functionSuffix = toFunctionNameCpp(value);
+  if (functionSuffix == 'Auto') {
+    return functionPrefix + functionSuffix + '(' + nodeName + ');';
+  } else {
+    return (
+      functionPrefix +
+      functionSuffix +
+      '(' +
+      nodeName +
+      ', ' +
+      toValueCpp(value) +
+      ');'
+    );
+  }
+}
+
 const CPPEmitter = function () {
   Emitter.call(this, 'cpp', '  ');
 };
@@ -231,7 +248,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     value: function (nodeName, value) {
       this.push(
         'YGNodeStyleSetAspectRatio' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -273,15 +290,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
 
   YGNodeStyleSetFlexBasis: {
     value: function (nodeName, value) {
-      this.push(
+      this.push(keywordFunctionCpp('YGNodeStyleSetFlexBasis', nodeName, value));
-        'YGNodeStyleSetFlexBasis' +
-          toFunctionName(value) +
-          '(' +
-          nodeName +
-          ', ' +
-          toValueCpp(value) +
-          ');',
-      );
     },
   },
 
@@ -325,20 +334,6 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
-  YGNodeStyleSetHeight: {
-    value: function (nodeName, value) {
-      this.push(
-        'YGNodeStyleSetHeight' +
-          toFunctionName(value) +
-          '(' +
-          nodeName +
-          ', ' +
-          toValueCpp(value) +
-          ');',
-      );
-    },
-  },
-
   YGNodeStyleSetJustifyContent: {
     value: function (nodeName, value) {
       this.push(
@@ -361,7 +356,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
       }
       this.push(
         'YGNodeStyleSetMargin' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -372,11 +367,23 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
+  YGNodeStyleSetHeight: {
+    value: function (nodeName, value) {
+      this.push(keywordFunctionCpp('YGNodeStyleSetHeight', nodeName, value));
+    },
+  },
+
+  YGNodeStyleSetWidth: {
+    value: function (nodeName, value) {
+      this.push(keywordFunctionCpp('YGNodeStyleSetWidth', nodeName, value));
+    },
+  },
+
   YGNodeStyleSetMaxHeight: {
     value: function (nodeName, value) {
       this.push(
         'YGNodeStyleSetMaxHeight' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -390,7 +397,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     value: function (nodeName, value) {
       this.push(
         'YGNodeStyleSetMaxWidth' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -404,7 +411,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     value: function (nodeName, value) {
       this.push(
         'YGNodeStyleSetMinHeight' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -418,7 +425,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     value: function (nodeName, value) {
       this.push(
         'YGNodeStyleSetMinWidth' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -440,7 +447,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     value: function (nodeName, edge, value) {
       this.push(
         'YGNodeStyleSetPadding' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -462,7 +469,7 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
       }
       this.push(
         'YGNodeStyleSetPosition' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +
@@ -485,25 +492,11 @@ CPPEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
-  YGNodeStyleSetWidth: {
-    value: function (nodeName, value) {
-      this.push(
-        'YGNodeStyleSetWidth' +
-          toFunctionName(value) +
-          '(' +
-          nodeName +
-          ', ' +
-          toValueCpp(value) +
-          ');',
-      );
-    },
-  },
-
   YGNodeStyleSetGap: {
     value: function (nodeName, gap, value) {
       this.push(
         'YGNodeStyleSetGap' +
-          toFunctionName(value) +
+          toFunctionNameCpp(value) +
           '(' +
           nodeName +
           ', ' +

gentest/gentest-java.js

@@ -21,6 +21,23 @@ function toMethodName(value) {
   return '';
 }
 
+function keywordMethod(methodPrefix, nodeName, value) {
+  const methodSuffix = toMethodName(value);
+  if (methodSuffix == 'Auto') {
+    return nodeName + '.' + methodPrefix + methodSuffix + '();';
+  } else {
+    return (
+      nodeName +
+      '.' +
+      methodPrefix +
+      methodSuffix +
+      '(' +
+      toValueJava(value) +
+      'f);'
+    );
+  }
+}
+
 const JavaEmitter = function () {
   Emitter.call(this, 'java', '  ');
 };
@@ -273,14 +290,7 @@ JavaEmitter.prototype = Object.create(Emitter.prototype, {
 
   YGNodeStyleSetFlexBasis: {
     value: function (nodeName, value) {
-      this.push(
+      this.push(keywordMethod('setFlexBasis', nodeName, value));
-        nodeName +
-          '.setFlexBasis' +
-          toMethodName(value) +
-          '(' +
-          toValueJava(value) +
-          'f);',
-      );
     },
   },
 
@@ -308,19 +318,6 @@ JavaEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
-  YGNodeStyleSetHeight: {
-    value: function (nodeName, value) {
-      this.push(
-        nodeName +
-          '.setHeight' +
-          toMethodName(value) +
-          '(' +
-          toValueJava(value) +
-          'f);',
-      );
-    },
-  },
-
   YGNodeStyleSetJustifyContent: {
     value: function (nodeName, value) {
       this.push(nodeName + '.setJustifyContent(' + toValueJava(value) + ');');
@@ -348,6 +345,18 @@ JavaEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
+  YGNodeStyleSetHeight: {
+    value: function (nodeName, value) {
+      this.push(keywordMethod('setHeight', nodeName, value));
+    },
+  },
+
+  YGNodeStyleSetWidth: {
+    value: function (nodeName, value) {
+      this.push(keywordMethod('setWidth', nodeName, value));
+    },
+  },
+
   YGNodeStyleSetMaxHeight: {
     value: function (nodeName, value) {
       this.push(
@@ -448,19 +457,6 @@ JavaEmitter.prototype = Object.create(Emitter.prototype, {
     },
   },
 
-  YGNodeStyleSetWidth: {
-    value: function (nodeName, value) {
-      this.push(
-        nodeName +
-          '.setWidth' +
-          toMethodName(value) +
-          '(' +
-          toValueJava(value) +
-          'f);',
-      );
-    },
-  },
-
   YGNodeStyleSetGap: {
     value: function (nodeName, gap, value) {
       this.push(

java/tests/generated/com/facebook/yoga/YGAutoTest.java

@@ -0,0 +1,325 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @generated SignedSource<<30103b31d09984d8443cf1ba544adeb7>>
+ * generated by gentest/gentest-driver.ts from gentest/fixtures/YGAutoTest.html
+ */
+
+package com.facebook.yoga;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import com.facebook.yoga.utils.TestUtils;
+
+@RunWith(Parameterized.class)
+public class YGAutoTest {
+  @Parameterized.Parameters(name = "{0}")
+  public static Iterable<TestParametrization.NodeFactory> nodeFactories() {
+    return TestParametrization.nodeFactories();
+  }
+
+  @Parameterized.Parameter public TestParametrization.NodeFactory mNodeFactory;
+
+  @Test
+  public void test_auto_width() {
+    YogaConfig config = YogaConfigFactory.create();
+
+    final YogaNode root = createNode(config);
+    root.setFlexDirection(YogaFlexDirection.ROW);
+    root.setPositionType(YogaPositionType.ABSOLUTE);
+    root.setWidthAuto();
+    root.setHeight(50f);
+
+    final YogaNode root_child0 = createNode(config);
+    root_child0.setWidth(50f);
+    root_child0.setHeight(50f);
+    root.addChildAt(root_child0, 0);
+
+    final YogaNode root_child1 = createNode(config);
+    root_child1.setWidth(50f);
+    root_child1.setHeight(50f);
+    root.addChildAt(root_child1, 1);
+
+    final YogaNode root_child2 = createNode(config);
+    root_child2.setWidth(50f);
+    root_child2.setHeight(50f);
+    root.addChildAt(root_child2, 2);
+    root.setDirection(YogaDirection.LTR);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(150f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(50f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(100f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(150f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(100f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(50f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+  }
+
+  @Test
+  public void test_auto_height() {
+    YogaConfig config = YogaConfigFactory.create();
+
+    final YogaNode root = createNode(config);
+    root.setPositionType(YogaPositionType.ABSOLUTE);
+    root.setWidth(50f);
+    root.setHeightAuto();
+
+    final YogaNode root_child0 = createNode(config);
+    root_child0.setWidth(50f);
+    root_child0.setHeight(50f);
+    root.addChildAt(root_child0, 0);
+
+    final YogaNode root_child1 = createNode(config);
+    root_child1.setWidth(50f);
+    root_child1.setHeight(50f);
+    root.addChildAt(root_child1, 1);
+
+    final YogaNode root_child2 = createNode(config);
+    root_child2.setWidth(50f);
+    root_child2.setHeight(50f);
+    root.addChildAt(root_child2, 2);
+    root.setDirection(YogaDirection.LTR);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(150f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(150f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+  }
+
+  @Test
+  public void test_auto_flex_basis() {
+    YogaConfig config = YogaConfigFactory.create();
+
+    final YogaNode root = createNode(config);
+    root.setPositionType(YogaPositionType.ABSOLUTE);
+    root.setWidth(50f);
+
+    final YogaNode root_child0 = createNode(config);
+    root_child0.setWidth(50f);
+    root_child0.setHeight(50f);
+    root.addChildAt(root_child0, 0);
+
+    final YogaNode root_child1 = createNode(config);
+    root_child1.setWidth(50f);
+    root_child1.setHeight(50f);
+    root.addChildAt(root_child1, 1);
+
+    final YogaNode root_child2 = createNode(config);
+    root_child2.setWidth(50f);
+    root_child2.setHeight(50f);
+    root.addChildAt(root_child2, 2);
+    root.setDirection(YogaDirection.LTR);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(150f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(150f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child0.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child1.getLayoutX(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child1.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child2.getLayoutX(), 0.0f);
+    assertEquals(100f, root_child2.getLayoutY(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root_child2.getLayoutHeight(), 0.0f);
+  }
+
+  @Test
+  public void test_auto_position() {
+    YogaConfig config = YogaConfigFactory.create();
+
+    final YogaNode root = createNode(config);
+    root.setPositionType(YogaPositionType.ABSOLUTE);
+    root.setWidth(50f);
+    root.setHeight(50f);
+
+    final YogaNode root_child0 = createNode(config);
+    root_child0.setPositionAuto(YogaEdge.RIGHT);
+    root_child0.setWidth(25f);
+    root_child0.setHeight(25f);
+    root.addChildAt(root_child0, 0);
+    root.setDirection(YogaDirection.LTR);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(0f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutHeight(), 0.0f);
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(25f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutHeight(), 0.0f);
+  }
+
+  @Test
+  public void test_auto_margin() {
+    YogaConfig config = YogaConfigFactory.create();
+
+    final YogaNode root = createNode(config);
+    root.setPositionType(YogaPositionType.ABSOLUTE);
+    root.setWidth(50f);
+    root.setHeight(50f);
+
+    final YogaNode root_child0 = createNode(config);
+    root_child0.setMarginAuto(YogaEdge.LEFT);
+    root_child0.setWidth(25f);
+    root_child0.setHeight(25f);
+    root.addChildAt(root_child0, 0);
+    root.setDirection(YogaDirection.LTR);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(25f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutHeight(), 0.0f);
+
+    root.setDirection(YogaDirection.RTL);
+    root.calculateLayout(YogaConstants.UNDEFINED, YogaConstants.UNDEFINED);
+
+    assertEquals(0f, root.getLayoutX(), 0.0f);
+    assertEquals(0f, root.getLayoutY(), 0.0f);
+    assertEquals(50f, root.getLayoutWidth(), 0.0f);
+    assertEquals(50f, root.getLayoutHeight(), 0.0f);
+
+    assertEquals(25f, root_child0.getLayoutX(), 0.0f);
+    assertEquals(0f, root_child0.getLayoutY(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutWidth(), 0.0f);
+    assertEquals(25f, root_child0.getLayoutHeight(), 0.0f);
+  }
+
+  private YogaNode createNode(YogaConfig config) {
+    return mNodeFactory.create(config);
+  }
+}

javascript/tests/generated/YGAutoTest.test.ts

@@ -0,0 +1,347 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @generated SignedSource<<234cdb7f76ac586e034a5b6ca2033fa4>>
+ * generated by gentest/gentest-driver.ts from gentest/fixtures/YGAutoTest.html
+ */
+
+import { instrinsicSizeMeasureFunc } from '../tools/utils.ts'
+import Yoga from 'yoga-layout';
+import {
+  Align,
+  BoxSizing,
+  Direction,
+  Display,
+  Edge,
+  Errata,
+  ExperimentalFeature,
+  FlexDirection,
+  Gutter,
+  Justify,
+  MeasureMode,
+  Overflow,
+  PositionType,
+  Unit,
+  Wrap,
+} from 'yoga-layout';
+
+test('auto_width', () => {
+  const config = Yoga.Config.create();
+  let root;
+
+  try {
+    root = Yoga.Node.create(config);
+    root.setFlexDirection(FlexDirection.Row);
+    root.setPositionType(PositionType.Absolute);
+    root.setWidth('auto');
+    root.setHeight(50);
+
+    const root_child0 = Yoga.Node.create(config);
+    root_child0.setWidth(50);
+    root_child0.setHeight(50);
+    root.insertChild(root_child0, 0);
+
+    const root_child1 = Yoga.Node.create(config);
+    root_child1.setWidth(50);
+    root_child1.setHeight(50);
+    root.insertChild(root_child1, 1);
+
+    const root_child2 = Yoga.Node.create(config);
+    root_child2.setWidth(50);
+    root_child2.setHeight(50);
+    root.insertChild(root_child2, 2);
+    root.calculateLayout(undefined, undefined, Direction.LTR);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(150);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(50);
+    expect(root_child1.getComputedTop()).toBe(0);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(100);
+    expect(root_child2.getComputedTop()).toBe(0);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+
+    root.calculateLayout(undefined, undefined, Direction.RTL);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(150);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(100);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(50);
+    expect(root_child1.getComputedTop()).toBe(0);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(0);
+    expect(root_child2.getComputedTop()).toBe(0);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+  } finally {
+    if (typeof root !== 'undefined') {
+      root.freeRecursive();
+    }
+
+    config.free();
+  }
+});
+test('auto_height', () => {
+  const config = Yoga.Config.create();
+  let root;
+
+  try {
+    root = Yoga.Node.create(config);
+    root.setPositionType(PositionType.Absolute);
+    root.setWidth(50);
+    root.setHeight('auto');
+
+    const root_child0 = Yoga.Node.create(config);
+    root_child0.setWidth(50);
+    root_child0.setHeight(50);
+    root.insertChild(root_child0, 0);
+
+    const root_child1 = Yoga.Node.create(config);
+    root_child1.setWidth(50);
+    root_child1.setHeight(50);
+    root.insertChild(root_child1, 1);
+
+    const root_child2 = Yoga.Node.create(config);
+    root_child2.setWidth(50);
+    root_child2.setHeight(50);
+    root.insertChild(root_child2, 2);
+    root.calculateLayout(undefined, undefined, Direction.LTR);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(150);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(0);
+    expect(root_child1.getComputedTop()).toBe(50);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(0);
+    expect(root_child2.getComputedTop()).toBe(100);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+
+    root.calculateLayout(undefined, undefined, Direction.RTL);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(150);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(0);
+    expect(root_child1.getComputedTop()).toBe(50);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(0);
+    expect(root_child2.getComputedTop()).toBe(100);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+  } finally {
+    if (typeof root !== 'undefined') {
+      root.freeRecursive();
+    }
+
+    config.free();
+  }
+});
+test('auto_flex_basis', () => {
+  const config = Yoga.Config.create();
+  let root;
+
+  try {
+    root = Yoga.Node.create(config);
+    root.setPositionType(PositionType.Absolute);
+    root.setWidth(50);
+
+    const root_child0 = Yoga.Node.create(config);
+    root_child0.setWidth(50);
+    root_child0.setHeight(50);
+    root.insertChild(root_child0, 0);
+
+    const root_child1 = Yoga.Node.create(config);
+    root_child1.setWidth(50);
+    root_child1.setHeight(50);
+    root.insertChild(root_child1, 1);
+
+    const root_child2 = Yoga.Node.create(config);
+    root_child2.setWidth(50);
+    root_child2.setHeight(50);
+    root.insertChild(root_child2, 2);
+    root.calculateLayout(undefined, undefined, Direction.LTR);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(150);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(0);
+    expect(root_child1.getComputedTop()).toBe(50);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(0);
+    expect(root_child2.getComputedTop()).toBe(100);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+
+    root.calculateLayout(undefined, undefined, Direction.RTL);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(150);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(50);
+    expect(root_child0.getComputedHeight()).toBe(50);
+
+    expect(root_child1.getComputedLeft()).toBe(0);
+    expect(root_child1.getComputedTop()).toBe(50);
+    expect(root_child1.getComputedWidth()).toBe(50);
+    expect(root_child1.getComputedHeight()).toBe(50);
+
+    expect(root_child2.getComputedLeft()).toBe(0);
+    expect(root_child2.getComputedTop()).toBe(100);
+    expect(root_child2.getComputedWidth()).toBe(50);
+    expect(root_child2.getComputedHeight()).toBe(50);
+  } finally {
+    if (typeof root !== 'undefined') {
+      root.freeRecursive();
+    }
+
+    config.free();
+  }
+});
+test('auto_position', () => {
+  const config = Yoga.Config.create();
+  let root;
+
+  try {
+    root = Yoga.Node.create(config);
+    root.setPositionType(PositionType.Absolute);
+    root.setWidth(50);
+    root.setHeight(50);
+
+    const root_child0 = Yoga.Node.create(config);
+    root_child0.setPositionAuto(Edge.Right);
+    root_child0.setWidth(25);
+    root_child0.setHeight(25);
+    root.insertChild(root_child0, 0);
+    root.calculateLayout(undefined, undefined, Direction.LTR);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(0);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(25);
+    expect(root_child0.getComputedHeight()).toBe(25);
+
+    root.calculateLayout(undefined, undefined, Direction.RTL);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(25);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(25);
+    expect(root_child0.getComputedHeight()).toBe(25);
+  } finally {
+    if (typeof root !== 'undefined') {
+      root.freeRecursive();
+    }
+
+    config.free();
+  }
+});
+test('auto_margin', () => {
+  const config = Yoga.Config.create();
+  let root;
+
+  try {
+    root = Yoga.Node.create(config);
+    root.setPositionType(PositionType.Absolute);
+    root.setWidth(50);
+    root.setHeight(50);
+
+    const root_child0 = Yoga.Node.create(config);
+    root_child0.setMargin(Edge.Left, 'auto');
+    root_child0.setWidth(25);
+    root_child0.setHeight(25);
+    root.insertChild(root_child0, 0);
+    root.calculateLayout(undefined, undefined, Direction.LTR);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(25);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(25);
+    expect(root_child0.getComputedHeight()).toBe(25);
+
+    root.calculateLayout(undefined, undefined, Direction.RTL);
+
+    expect(root.getComputedLeft()).toBe(0);
+    expect(root.getComputedTop()).toBe(0);
+    expect(root.getComputedWidth()).toBe(50);
+    expect(root.getComputedHeight()).toBe(50);
+
+    expect(root_child0.getComputedLeft()).toBe(25);
+    expect(root_child0.getComputedTop()).toBe(0);
+    expect(root_child0.getComputedWidth()).toBe(25);
+    expect(root_child0.getComputedHeight()).toBe(25);
+  } finally {
+    if (typeof root !== 'undefined') {
+      root.freeRecursive();
+    }
+
+    config.free();
+  }
+});

tests/generated/YGAutoTest.cpp

@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * clang-format off
+ * @generated SignedSource<<00e4ee58a2a66a3fcd064d3c517d8330>>
+ * generated by gentest/gentest-driver.ts from gentest/fixtures/YGAutoTest.html
+ */
+
+#include <gtest/gtest.h>
+#include <yoga/Yoga.h>
+#include "../util/TestUtil.h"
+
+TEST(YogaTest, auto_width) {
+  YGConfigRef config = YGConfigNew();
+
+  YGNodeRef root = YGNodeNewWithConfig(config);
+  YGNodeStyleSetFlexDirection(root, YGFlexDirectionRow);
+  YGNodeStyleSetPositionType(root, YGPositionTypeAbsolute);
+  YGNodeStyleSetWidthAuto(root);
+  YGNodeStyleSetHeight(root, 50);
+
+  YGNodeRef root_child0 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child0, 50);
+  YGNodeStyleSetHeight(root_child0, 50);
+  YGNodeInsertChild(root, root_child0, 0);
+
+  YGNodeRef root_child1 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child1, 50);
+  YGNodeStyleSetHeight(root_child1, 50);
+  YGNodeInsertChild(root, root_child1, 1);
+
+  YGNodeRef root_child2 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child2, 50);
+  YGNodeStyleSetHeight(root_child2, 50);
+  YGNodeInsertChild(root, root_child2, 2);
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionRTL);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeFreeRecursive(root);
+
+  YGConfigFree(config);
+}
+
+TEST(YogaTest, auto_height) {
+  YGConfigRef config = YGConfigNew();
+
+  YGNodeRef root = YGNodeNewWithConfig(config);
+  YGNodeStyleSetPositionType(root, YGPositionTypeAbsolute);
+  YGNodeStyleSetWidth(root, 50);
+  YGNodeStyleSetHeightAuto(root);
+
+  YGNodeRef root_child0 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child0, 50);
+  YGNodeStyleSetHeight(root_child0, 50);
+  YGNodeInsertChild(root, root_child0, 0);
+
+  YGNodeRef root_child1 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child1, 50);
+  YGNodeStyleSetHeight(root_child1, 50);
+  YGNodeInsertChild(root, root_child1, 1);
+
+  YGNodeRef root_child2 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child2, 50);
+  YGNodeStyleSetHeight(root_child2, 50);
+  YGNodeInsertChild(root, root_child2, 2);
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionRTL);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeFreeRecursive(root);
+
+  YGConfigFree(config);
+}
+
+TEST(YogaTest, auto_flex_basis) {
+  YGConfigRef config = YGConfigNew();
+
+  YGNodeRef root = YGNodeNewWithConfig(config);
+  YGNodeStyleSetPositionType(root, YGPositionTypeAbsolute);
+  YGNodeStyleSetWidth(root, 50);
+
+  YGNodeRef root_child0 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child0, 50);
+  YGNodeStyleSetHeight(root_child0, 50);
+  YGNodeInsertChild(root, root_child0, 0);
+
+  YGNodeRef root_child1 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child1, 50);
+  YGNodeStyleSetHeight(root_child1, 50);
+  YGNodeInsertChild(root, root_child1, 1);
+
+  YGNodeRef root_child2 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetWidth(root_child2, 50);
+  YGNodeStyleSetHeight(root_child2, 50);
+  YGNodeInsertChild(root, root_child2, 2);
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionRTL);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(150, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child0));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetTop(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child1));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child1));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child2));
+  ASSERT_FLOAT_EQ(100, YGNodeLayoutGetTop(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root_child2));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root_child2));
+
+  YGNodeFreeRecursive(root);
+
+  YGConfigFree(config);
+}
+
+TEST(YogaTest, auto_position) {
+  YGConfigRef config = YGConfigNew();
+
+  YGNodeRef root = YGNodeNewWithConfig(config);
+  YGNodeStyleSetPositionType(root, YGPositionTypeAbsolute);
+  YGNodeStyleSetWidth(root, 50);
+  YGNodeStyleSetHeight(root, 50);
+
+  YGNodeRef root_child0 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetPositionAuto(root_child0, YGEdgeRight);
+  YGNodeStyleSetWidth(root_child0, 25);
+  YGNodeStyleSetHeight(root_child0, 25);
+  YGNodeInsertChild(root, root_child0, 0);
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetHeight(root_child0));
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionRTL);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetHeight(root_child0));
+
+  YGNodeFreeRecursive(root);
+
+  YGConfigFree(config);
+}
+
+TEST(YogaTest, auto_margin) {
+  YGConfigRef config = YGConfigNew();
+
+  YGNodeRef root = YGNodeNewWithConfig(config);
+  YGNodeStyleSetPositionType(root, YGPositionTypeAbsolute);
+  YGNodeStyleSetWidth(root, 50);
+  YGNodeStyleSetHeight(root, 50);
+
+  YGNodeRef root_child0 = YGNodeNewWithConfig(config);
+  YGNodeStyleSetMarginAuto(root_child0, YGEdgeLeft);
+  YGNodeStyleSetWidth(root_child0, 25);
+  YGNodeStyleSetHeight(root_child0, 25);
+  YGNodeInsertChild(root, root_child0, 0);
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetHeight(root_child0));
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionRTL);
+
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetLeft(root));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetWidth(root));
+  ASSERT_FLOAT_EQ(50, YGNodeLayoutGetHeight(root));
+
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetLeft(root_child0));
+  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetTop(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetWidth(root_child0));
+  ASSERT_FLOAT_EQ(25, YGNodeLayoutGetHeight(root_child0));
+
+  YGNodeFreeRecursive(root);
+
+  YGConfigFree(config);
+}