5 files changed, 118 insertions, 0 deletions
diff --git a/test/content/follow.html b/test/content/follow.html
new file mode 100644
index 0000000..6bd8f87
--- /dev/null
+++ b/test/content/follow.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <body>
+    <a href='#' >link</a>
+    <a href='#' style='display:none'>invisible 1</a>
+    <a href='#' style='visibility:hidden'>invisible 2</a>
+    <i>not link<i>
+  </body>
+</html>
diff --git a/test/content/follow.test.js b/test/content/follow.test.js
new file mode 100644
index 0000000..fd4f0bc
--- /dev/null
+++ b/test/content/follow.test.js
@@ -0,0 +1,25 @@
+import { expect } from "chai";
+import Follow from '../../src/content/follow';
+
+describe('Follow class', () => {
+  describe('#codeChars', () => {
+    it('returns a string for key codes', () => {
+      let chars = [
+        KeyboardEvent.DOM_VK_0, KeyboardEvent.DOM_VK_1,
+        KeyboardEvent.DOM_VK_A, KeyboardEvent.DOM_VK_B];
+      expect(Follow.codeChars(chars)).to.equal('01ab');
+      expect(Follow.codeChars([])).to.be.equal('');
+    });
+  });
+
+  describe('#getTargetElements', () => {
+    beforeEach(() => {
+      document.body.innerHTML = __html__['test/content/follow.html'];
+    });
+
+    it('returns visible links', () => {
+      let links = Follow.getTargetElements(window.document);
+      expect(links).to.have.lengthOf(1);
+    });
+  });
+});
diff --git a/test/content/hint-key-producer.test.js b/test/content/hint-key-producer.test.js
new file mode 100644
index 0000000..74fb462
--- /dev/null
+++ b/test/content/hint-key-producer.test.js
@@ -0,0 +1,25 @@
+import { expect } from "chai";
+import HintKeyProducer from '../../src/content/hint-key-producer';
+
+describe('HintKeyProducer class', () => {
+  describe('#constructor', () => {
+    it('throws an exception on empty charset', () => {
+      expect(() => new HintKeyProducer([])).to.throw(TypeError);
+    });
+  });
+
+  describe('#produce', () => {
+    it('produce incremented keys', () => {
+      let charset = 'abc';
+      let sequences = [
+        'a', 'b', 'c',
+        'aa', 'ab', 'ac', 'ba', 'bb', 'bc', 'ca', 'cb', 'cc',
+        'aaa', 'aab', 'aac', 'aba']
+
+      let producer = new HintKeyProducer(charset);
+      for (let i = 0; i < sequences.length; ++i) {
+        expect(producer.produce()).to.equal(sequences[i]);
+      }
+    });
+  });
+});
diff --git a/test/content/hint.html b/test/content/hint.html
new file mode 100644
index 0000000..b50c5fe
--- /dev/null
+++ b/test/content/hint.html
@@ -0,0 +1 @@
+<a id='test-link' href='javascript:window.vimvixenTest="hello"' >link</a>
diff --git a/test/content/hint.test.js b/test/content/hint.test.js
new file mode 100644
index 0000000..9b2ab6e
--- /dev/null
+++ b/test/content/hint.test.js
@@ -0,0 +1,58 @@
+import { expect } from "chai";
+import Hint from '../../src/content/hint';
+
+describe('Hint class', () => {
+  beforeEach(() => {
+    document.body.innerHTML = __html__['test/content/hint.html'];
+  });
+
+  describe('#constructor', () => {
+    it('creates a hint element with tag name', () => {
+      let link = document.getElementById('test-link');
+      let hint = new Hint(link, 'abc');
+      expect(hint.element.textContent.trim()).to.be.equal('abc');
+    });
+
+    it('throws an exception when non-element given', () => {
+      expect(() => new Hint(window, 'abc')).to.throw(TypeError);
+    });
+  });
+
+  describe('#show', () => {
+    it('shows an element', () => {
+      let link = document.getElementById('test-link');
+      let hint = new Hint(link, 'abc');
+      hint.hide();
+      hint.show();
+
+      expect(hint.element.style.display).to.not.equal('none');
+    });
+  });
+
+  describe('#hide', () => {
+    it('hides an element', () => {
+      let link = document.getElementById('test-link');
+      let hint = new Hint(link, 'abc');
+      hint.hide();
+
+      expect(hint.element.style.display).to.equal('none');
+    });
+  });
+
+  describe('#remove', () => {
+    it('removes an element', () => {
+      let link = document.getElementById('test-link');
+      let hint = new Hint(link, 'abc');
+
+      expect(hint.element.parentElement).to.not.be.null;
+      hint.remove();
+      expect(hint.element.parentElement).to.be.null;
+    });
+  });
+
+  describe('#activate', () => {
+    // TODO test activations
+  });
+});
+
+