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test/unit/bidi_spec.js

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+/* Copyright 2017 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { bidi } from "../../src/core/bidi.js";
+
+describe("bidi", function () {
+  it(
+    "should mark text as LTR if there's only LTR-characters, " +
+      "when the string is very short",
+    function () {
+      const str = "foo";
+      const bidiText = bidi(str, -1, false);
+
+      expect(bidiText.str).toEqual("foo");
+      expect(bidiText.dir).toEqual("ltr");
+    }
+  );
+
+  it("should mark text as LTR if there's only LTR-characters", function () {
+    const str = "Lorem ipsum dolor sit amet, consectetur adipisicing elit.";
+    const bidiText = bidi(str, -1, false);
+
+    expect(bidiText.str).toEqual(
+      "Lorem ipsum dolor sit amet, consectetur adipisicing elit."
+    );
+    expect(bidiText.dir).toEqual("ltr");
+  });
+
+  it("should mark text as RTL if more than 30% of text is RTL", function () {
+    // 33% of test text are RTL characters
+    const test = "\u0645\u0635\u0631 Egypt";
+    const result = "Egypt \u0631\u0635\u0645";
+    const bidiText = bidi(test, -1, false);
+
+    expect(bidiText.str).toEqual(result);
+    expect(bidiText.dir).toEqual("rtl");
+  });
+
+  it("should mark text as LTR if less than 30% of text is RTL", function () {
+    const test = "Egypt is known as \u0645\u0635\u0631 in Arabic.";
+    const result = "Egypt is known as \u0631\u0635\u0645 in Arabic.";
+    const bidiText = bidi(test, -1, false);
+
+    expect(bidiText.str).toEqual(result);
+    expect(bidiText.dir).toEqual("ltr");
+  });
+
+  it(
+    "should mark text as RTL if less than 30% of text is RTL, " +
+      "when the string is very short (issue 11656)",
+    function () {
+      const str = "()\u05d1("; // 25% of the string is RTL characters.
+      const bidiText = bidi(str, -1, false);
+
+      expect(bidiText.str).toEqual("(\u05d1)(");
+      expect(bidiText.dir).toEqual("rtl");
+    }
+  );
+});