Introduce toDynamic conversion for TextAttributes class

Summary: This diff introduces a way to convert TextAttributes object to dynamic objects

Reviewed By: shergin

Differential Revision: D9800636

fbshipit-source-id: 592f1cb60a00d3beaecee221259e8914731049d4

ReactCommon/fabric/attributedstring/tests/TextAttributesTest.cpp

@@ -0,0 +1,36 @@
+/**
+ * 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.
+ */
+
+#include <memory>
+
+#include <fabric/attributedstring/TextAttributes.h>
+#include <fabric/attributedstring/conversions.h>
+#include <fabric/attributedstring/primitives.h>
+#include <fabric/graphics/conversions.h>
+#include <gtest/gtest.h>
+#include <assert.h>
+
+namespace facebook {
+namespace react {
+
+TEST(TextAttributesTest, testToDynamic) {
+  auto text = TextAttributes();
+  text.foregroundColor = {colorFromComponents({200/255.0, 153/255.0, 100/255.0, 1.0})};
+  text.opacity = 0.5;
+  text.fontStyle = FontStyle::Italic;
+  text.fontWeight = FontWeight::Thin;
+  text.fontVariant = FontVariant::TabularNums;
+
+  auto result = toDynamic(text);
+  assert(result["foregroundColor"] == toDynamic(text.foregroundColor));
+  assert(result["opacity"] == text.opacity);
+  assert(result["fontStyle"] == toString(*text.fontStyle));
+  assert(result["fontWeight"] == toString(*text.fontWeight));
+}
+
+}
+}