Merge pull request #375 from toasted-nutbread/document-tests

Document tests

6 files changed, 1227 insertions, 2 deletions

diff --git a/package-lock.json b/package-lock.json
index 505c71db..88ba43f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,18 +24,48 @@
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@@ -81,12 +111,45 @@
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@@ -99,6 +162,15 @@
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@@ -109,12 +181,24 @@
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@@ -162,6 +246,15 @@
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@@ -174,6 +267,12 @@
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@@ -195,6 +294,77 @@
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@@ -204,12 +374,24 @@
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@@ -228,6 +410,16 @@
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@@ -240,6 +432,19 @@
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@@ -374,6 +585,12 @@
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@@ -555,6 +834,12 @@
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+        "uuid": {
+            "version": "3.4.0",
+            "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+            "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+            "dev": true
+        },
         "v8-compile-cache": {
             "version": "2.1.0",
             "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
             "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
             "dev": true
         },
+        "verror": {
+            "version": "1.10.0",
+            "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+            "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+            "dev": true,
+            "requires": {
+                "assert-plus": "^1.0.0",
+                "core-util-is": "1.0.2",
+                "extsprintf": "^1.2.0"
+            }
+        },
+        "w3c-hr-time": {
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.1.tgz",
+            "integrity": "sha1-gqwr/2PZUOqeMYmlimViX+3xkEU=",
+            "dev": true,
+            "requires": {
+                "browser-process-hrtime": "^0.1.2"
+            }
+        },
+        "w3c-xmlserializer": {
+            "version": "2.0.0",
+            "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
+            "integrity": "sha512-4tzD0mF8iSiMiNs30BiLO3EpfGLZUT2MSX/G+o7ZywDzliWQ3OPtTZ0PTC3B3ca1UAf4cJMHB+2Bf56EriJuRA==",
+            "dev": true,
+            "requires": {
+                "xml-name-validator": "^3.0.0"
+            }
+        },
         "webidl-conversions": {
             "version": "4.0.2",
             "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
             "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
             "dev": true
         },
+        "whatwg-encoding": {
+            "version": "1.0.5",
+            "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
+            "integrity": "sha512-b5lim54JOPN9HtzvK9HFXvBma/rnfFeqsic0hSpjtDbVxR3dJKLc+KB4V6GgiGOvl7CY/KNh8rxSo9DKQrnUEw==",
+            "dev": true,
+            "requires": {
+                "iconv-lite": "0.4.24"
+            }
+        },
+        "whatwg-mimetype": {
+            "version": "2.3.0",
+            "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+            "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g==",
+            "dev": true
+        },
         "whatwg-url": {
             "version": "7.1.0",
             "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
@@ -1114,6 +1768,24 @@
             "requires": {
                 "mkdirp": "^0.5.1"
             }
+        },
+        "ws": {
+            "version": "7.2.1",
+            "resolved": "https://registry.npmjs.org/ws/-/ws-7.2.1.tgz",
+            "integrity": "sha512-sucePNSafamSKoOqoNfBd8V0StlkzJKL2ZAhGQinCfNQ+oacw+Pk7lcdAElecBF2VkLNZRiIb5Oi1Q5lVUVt2A==",
+            "dev": true
+        },
+        "xml-name-validator": {
+            "version": "3.0.0",
+            "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+            "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
+            "dev": true
+        },
+        "xmlchars": {
+            "version": "2.2.0",
+            "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+            "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+            "dev": true
         }
     }
 }
diff --git a/package.json b/package.json
index 17fdfa82..74d89dda 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "scripts": {
         "test": "npm run test-lint && npm run test-code",
         "test-lint": "eslint .",
-        "test-code": "node ./test/test-schema.js && node ./test/test-dictionary.js && node ./test/test-database.js"
+        "test-code": "node ./test/test-schema.js && node ./test/test-dictionary.js && node ./test/test-database.js && node ./test/test-document.js"
     },
     "repository": {
         "type": "git",
@@ -29,6 +29,7 @@
     "devDependencies": {
         "eslint": "^6.8.0",
         "eslint-plugin-no-unsanitized": "^3.0.2",
-        "fake-indexeddb": "^3.0.0"
+        "fake-indexeddb": "^3.0.0",
+        "jsdom": "^16.2.0"
     }
 }
diff --git a/test/data/html/test-document1.html b/test/data/html/test-document1.html
new file mode 100644
index 00000000..0754a314
--- /dev/null
+++ b/test/data/html/test-document1.html
@@ -0,0 +1,264 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width,initial-scale=1" />
+        <title>Yomichan Tests</title>
+        <link rel="icon" type="image/gif" href="data:image/gif;base64,R0lGODlhEAAQAKEBAAAAAP///////////yH5BAEKAAIALAAAAAAQABAAAAImFI6Zpt0B4YkS0TCpq07xbmEgcGVRUpLaI46ZG7ppalY0jDCwUAAAOw==" />
+        <link rel="stylesheet" href="test-stylesheet.css" />
+    </head>
+<body>
+
+    <h1>Yomichan Tests</h1>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="span"
+        data-caret-range-from-point-selector="span"
+        data-start-node-selector="span"
+        data-start-offset="0"
+        data-end-node-selector="span"
+        data-end-offset="0"
+        data-result-type="TextSourceRange",
+        data-sentence-extent="100"
+        data-sentence="真白「心配してくださって、ありがとございます」"
+    >
+        <span>真白「心配してくださって、ありがとございます」</span>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="span"
+        data-caret-range-from-point-selector="span"
+        data-start-node-selector="span"
+        data-start-offset="5"
+        data-end-node-selector="span"
+        data-end-offset="5"
+        data-result-type="TextSourceRange",
+        data-sentence-extent="100"
+        data-sentence="心配してくださって、ありがとございます"
+    >
+        <span>真白「心配してくださって、ありがとございます」</span>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="input"
+        data-caret-range-from-point-selector="input"
+        data-start-node-selector="input"
+        data-start-offset="0"
+        data-end-node-selector="input"
+        data-end-offset="0"
+        data-result-type="TextSourceRange",
+        data-sentence-extent="100"
+        data-sentence="真白「心配してくださって、ありがとございます」"
+        data-has-imposter="true"
+    >
+        <input type="text" value="真白「心配してくださって、ありがとございます」" style="width: 100%; box-sizing: border-box; font-family: inherit; font-size: inherit; border: 1px solid #d8d8d8; padding: 0.2em;" />
+    </div>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="textarea"
+        data-caret-range-from-point-selector="textarea"
+        data-start-node-selector="textarea"
+        data-start-offset="0"
+        data-end-node-selector="textarea"
+        data-end-offset="0"
+        data-result-type="TextSourceRange",
+        data-sentence-extent="100"
+        data-sentence="真白「心配してくださって、ありがとございます」"
+        data-has-imposter="true"
+    >
+        <textarea style="width: 100%; height: 3em; box-sizing: border-box; font-family: inherit; font-size: inherit; border: 1px solid #d8d8d8; padding: 0.2em;">真白「心配してくださって、ありがとございます」</textarea>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="button"
+        data-caret-range-from-point-selector="button"
+        data-start-node-selector="button"
+        data-start-offset="0"
+        data-end-node-selector="button"
+        data-end-offset="0"
+        data-result-type="TextSourceElement",
+        data-sentence-extent="100"
+        data-sentence="よみちゃん"
+    >
+        <button style="width: 100%; box-sizing: border-box; font-family: inherit; font-size: inherit; border: 1px solid #d8d8d8; background-color: #f0f0f0; padding: 0.2em;">よみちゃん</button>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="scan"
+        data-element-from-point-selector="img"
+        data-caret-range-from-point-selector="img"
+        data-start-node-selector="img"
+        data-start-offset="0"
+        data-end-node-selector="img"
+        data-end-offset="0"
+        data-result-type="TextSourceElement"
+        data-sentence="よみちゃん"
+    >
+        <img src="data:image/gif;base64,R0lGODdhBwAHAIABAAAAAP///ywAAAAABwAHAAACDIRvEaC32FpCbEkKCgA7" alt="よみちゃん" title="よみちゃん" style="width: 70px; height: 70px; image-rendering: crisp-edges; image-rendering: pixelated; display: block;" />
+    </div>
+
+    <div
+        class="test"
+        data-test-type="text-source-range-seek"
+        data-seek-node-selector="span:nth-of-type(1)"
+        data-seek-node-is-text="true"
+        data-seek-offset="0"
+        data-seek-length="149"
+        data-seek-direction="forward"
+        data-expected-result-node-selector="span:nth-of-type(1)"
+        data-expected-result-node-is-text="true"
+        data-expected-result-offset="149"
+        data-expected-result-content="
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        "
+    >
+        <span>
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        </span><span>trailing content</span>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="text-source-range-seek"
+        data-seek-node-selector="span:nth-of-type(1)"
+        data-seek-node-is-text="true"
+        data-seek-offset="149"
+        data-seek-length="149"
+        data-seek-direction="backward"
+        data-expected-result-node-selector="span:nth-of-type(1)"
+        data-expected-result-node-is-text="true"
+        data-expected-result-offset="0"
+        data-expected-result-content="
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        "
+    >
+        <span>
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        </span><span>trailing content</span>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="text-source-range-seek"
+        data-seek-node-selector="span:nth-of-type(1)"
+        data-seek-node-is-text="true"
+        data-seek-offset="0"
+        data-seek-length="150"
+        data-seek-direction="forward"
+        data-expected-result-node-selector="span:nth-of-type(2)"
+        data-expected-result-node-is-text="true"
+        data-expected-result-offset="1"
+        data-expected-result-content="
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        t"
+    >
+        <span>
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        </span><span>trailing content</span>
+    </div>
+
+    <div
+        class="test"
+        data-test-type="text-source-range-seek"
+        data-seek-node-selector="span:nth-of-type(2)"
+        data-seek-node-is-text="true"
+        data-seek-offset="1"
+        data-seek-length="150"
+        data-seek-direction="backward"
+        data-expected-result-node-selector="span:nth-of-type(1)"
+        data-expected-result-node-is-text="true"
+        data-expected-result-offset="0"
+        data-expected-result-content="
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        t"
+    >
+        <span>
+        あいうえお
+        かきくけこ
+        さしすせそ
+        たちつてと
+        なにぬねの
+        はひふへほ
+        まみむめも
+        や&#x3000;ゆ&#x3000;よ
+        らりるれろ
+        わゐ&#x3000;ゑを
+        </span><span>trailing content</span>
+    </div>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/test/data/html/test-stylesheet.css b/test/data/html/test-stylesheet.css
new file mode 100644
index 00000000..ab25732e
--- /dev/null
+++ b/test/data/html/test-stylesheet.css
@@ -0,0 +1,32 @@
+body {
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    font-size: 14px;
+    max-width: 680px;
+    padding: 0 1em;
+    box-sizing: border-box;
+    margin: 0 auto;
+    background-color: #f8f8f8;
+    counter-reset: test-id;
+}
+
+h1 {
+    font-size: 2em;
+    margin: 0.67em 0;
+}
+
+.test {
+    background-color: #ffffff;
+    margin: 1em 0;
+    padding: 0.5em;
+    box-shadow: rgba(64, 64, 64, 0.3) 0px 1px 2px 0px, rgba(64, 64, 64, 0.15) 0px 1px 3px 1px;
+    border-radius: 4px;
+}
+
+.test:before {
+    content: "Test " counter(test-id);
+    display: block;
+    counter-increment: test-id;
+    margin-bottom: 0.5em;
+    border-bottom: 1px solid #d8d8d8;
+    font-weight: bold;
+}
diff --git a/test/test-document.js b/test/test-document.js
new file mode 100644
index 00000000..edf6bbea
--- /dev/null
+++ b/test/test-document.js
@@ -0,0 +1,224 @@
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert');
+const {JSDOM} = require('jsdom');
+const yomichanTest = require('./yomichan-test');
+
+
+// DOMRect class definition
+class DOMRect {
+    constructor(x, y, width, height) {
+        this._x = x;
+        this._y = y;
+        this._width = width;
+        this._height = height;
+    }
+
+    get x() { return this._x; }
+    get y() { return this._y; }
+    get width() { return this._width; }
+    get height() { return this._height; }
+    get left() { return this._x + Math.min(0, this._width); }
+    get right() { return this._x + Math.max(0, this._width); }
+    get top() { return this._y + Math.min(0, this._height); }
+    get bottom() { return this._y + Math.max(0, this._height); }
+}
+
+
+function createJSDOM(fileName) {
+    const domSource = fs.readFileSync(fileName, {encoding: 'utf8'});
+    const dom = new JSDOM(domSource);
+    const document = dom.window.document;
+    const window = dom.window;
+
+    // Define innerText setter as an alias for textContent setter
+    Object.defineProperty(window.HTMLDivElement.prototype, 'innerText', {
+        set(value) { this.textContent = value; }
+    });
+
+    // Placeholder for feature detection
+    document.caretRangeFromPoint = () => null;
+
+    return dom;
+}
+
+function querySelectorChildOrSelf(element, selector) {
+    return selector ? element.querySelector(selector) : element;
+}
+
+function getChildTextNodeOrSelf(dom, node) {
+    if (node === null) { return null; }
+    const Node = dom.window.Node;
+    const childNode = node.firstChild;
+    return (childNode !== null && childNode.nodeType === Node.TEXT_NODE ? childNode : node);
+}
+
+function getPrototypeOfOrNull(value) {
+    try {
+        return Object.getPrototypeOf(value);
+    } catch (e) {
+        return null;
+    }
+}
+
+function findImposterElement(document) {
+    // Finds the imposter element based on it's z-index style
+    return document.querySelector('div[style*="2147483646"]>*');
+}
+
+
+async function testDocument1() {
+    const dom = createJSDOM(path.join(__dirname, 'data', 'html', 'test-document1.html'));
+    const window = dom.window;
+    const document = window.document;
+    const Node = window.Node;
+    const Range = window.Range;
+
+    const {DOM} = yomichanTest.requireScript(
+        'ext/mixed/js/dom.js',
+        ['DOM']
+    );
+    const {TextSourceRange, TextSourceElement} = yomichanTest.requireScript(
+        'ext/fg/js/source.js',
+        ['TextSourceRange', 'TextSourceElement'],
+        {document, window, Range, Node}
+    );
+    const {docRangeFromPoint, docSentenceExtract} = yomichanTest.requireScript(
+        'ext/fg/js/document.js',
+        ['docRangeFromPoint', 'docSentenceExtract'],
+        {document, window, Node, TextSourceElement, TextSourceRange, DOM}
+    );
+
+    try {
+        await testDocumentTextScanningFunctions(dom, {docRangeFromPoint, docSentenceExtract, TextSourceRange, TextSourceElement});
+        await testTextSourceRangeSeekFunctions(dom, {TextSourceRange});
+    } finally {
+        window.close();
+    }
+}
+
+async function testDocumentTextScanningFunctions(dom, {docRangeFromPoint, docSentenceExtract, TextSourceRange, TextSourceElement}) {
+    const document = dom.window.document;
+
+    for (const testElement of document.querySelectorAll('.test[data-test-type=scan]')) {
+        // Get test parameters
+        let {
+            elementFromPointSelector,
+            caretRangeFromPointSelector,
+            startNodeSelector,
+            startOffset,
+            endNodeSelector,
+            endOffset,
+            resultType,
+            sentenceExtent,
+            sentence,
+            hasImposter
+        } = testElement.dataset;
+
+        const elementFromPointValue = querySelectorChildOrSelf(testElement, elementFromPointSelector);
+        const caretRangeFromPointValue = querySelectorChildOrSelf(testElement, caretRangeFromPointSelector);
+        const startNode = getChildTextNodeOrSelf(dom, querySelectorChildOrSelf(testElement, startNodeSelector));
+        const endNode = getChildTextNodeOrSelf(dom, querySelectorChildOrSelf(testElement, endNodeSelector));
+
+        startOffset = parseInt(startOffset, 10);
+        endOffset = parseInt(endOffset, 10);
+        sentenceExtent = parseInt(sentenceExtent, 10);
+
+        assert.notStrictEqual(elementFromPointValue, null);
+        assert.notStrictEqual(caretRangeFromPointValue, null);
+        assert.notStrictEqual(startNode, null);
+        assert.notStrictEqual(endNode, null);
+
+        // Setup functions
+        document.elementFromPoint = () => elementFromPointValue;
+
+        document.caretRangeFromPoint = (x, y) => {
+            const imposter = getChildTextNodeOrSelf(dom, findImposterElement(document));
+            assert.strictEqual(!!imposter, hasImposter === 'true');
+
+            const range = document.createRange();
+            range.setStart(imposter ? imposter : startNode, startOffset);
+            range.setEnd(imposter ? imposter : startNode, endOffset);
+
+            // Override getClientRects to return a rect guaranteed to contain (x, y)
+            range.getClientRects = () => [new DOMRect(x - 1, y - 1, 2, 2)];
+            return range;
+        };
+
+        // Test docRangeFromPoint
+        const source = docRangeFromPoint(0, 0, false);
+        switch (resultType) {
+            case 'TextSourceRange':
+                assert.strictEqual(getPrototypeOfOrNull(source), TextSourceRange.prototype);
+                break;
+            case 'TextSourceElement':
+                assert.strictEqual(getPrototypeOfOrNull(source), TextSourceElement.prototype);
+                break;
+            case 'null':
+                assert.strictEqual(source, null);
+                break;
+            default:
+                assert.ok(false);
+                break;
+        }
+        if (source === null) { continue; }
+
+        // Test docSentenceExtract
+        const sentenceActual = docSentenceExtract(source, sentenceExtent).text;
+        assert.strictEqual(sentenceActual, sentence);
+
+        // Clean
+        source.cleanup();
+    }
+}
+
+async function testTextSourceRangeSeekFunctions(dom, {TextSourceRange}) {
+    const document = dom.window.document;
+
+    for (const testElement of document.querySelectorAll('.test[data-test-type=text-source-range-seek]')) {
+        // Get test parameters
+        let {
+            seekNodeSelector,
+            seekNodeIsText,
+            seekOffset,
+            seekLength,
+            seekDirection,
+            expectedResultNodeSelector,
+            expectedResultNodeIsText,
+            expectedResultOffset,
+            expectedResultContent
+        } = testElement.dataset;
+
+        seekOffset = parseInt(seekOffset, 10);
+        seekLength = parseInt(seekLength, 10);
+        expectedResultOffset = parseInt(expectedResultOffset, 10);
+
+        let seekNode = testElement.querySelector(seekNodeSelector);
+        if (seekNodeIsText === 'true') {
+            seekNode = seekNode.firstChild;
+        }
+
+        let expectedResultNode = testElement.querySelector(expectedResultNodeSelector);
+        if (expectedResultNodeIsText === 'true') {
+            expectedResultNode = expectedResultNode.firstChild;
+        }
+
+        const {node, offset, content} = (
+            seekDirection === 'forward' ?
+            TextSourceRange.seekForward(seekNode, seekOffset, seekLength) :
+            TextSourceRange.seekBackward(seekNode, seekOffset, seekLength)
+        );
+
+        assert.strictEqual(node, expectedResultNode);
+        assert.strictEqual(offset, expectedResultOffset);
+        assert.strictEqual(content, expectedResultContent);
+    }
+}
+
+
+async function main() {
+    await testDocument1();
+}
+
+
+if (require.main === module) { main(); }
diff --git a/test/test-stylesheet.css b/test/test-stylesheet.css
new file mode 100644
index 00000000..ab25732e
--- /dev/null
+++ b/test/test-stylesheet.css
@@ -0,0 +1,32 @@
+body {
+    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+    font-size: 14px;
+    max-width: 680px;
+    padding: 0 1em;
+    box-sizing: border-box;
+    margin: 0 auto;
+    background-color: #f8f8f8;
+    counter-reset: test-id;
+}
+
+h1 {
+    font-size: 2em;
+    margin: 0.67em 0;
+}
+
+.test {
+    background-color: #ffffff;
+    margin: 1em 0;
+    padding: 0.5em;
+    box-shadow: rgba(64, 64, 64, 0.3) 0px 1px 2px 0px, rgba(64, 64, 64, 0.15) 0px 1px 3px 1px;
+    border-radius: 4px;
+}
+
+.test:before {
+    content: "Test " counter(test-id);
+    display: block;
+    counter-increment: test-id;
+    margin-bottom: 0.5em;
+    border-bottom: 1px solid #d8d8d8;
+    font-weight: bold;
+}