Bug 1130891 part 5 - Add test for the copy behavior. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D102099

dom/base/test/copypaste.js

@@ -530,4 +530,27 @@ async function testCopyPaste(isXHTML) {
   await new Promise(resolve => {
     setTimeout(resolve, 0);
   });
+
+  if (!isXHTML) {
+    // ============ copy from ruby
+
+    const ruby1 = $("ruby1");
+    const ruby1Container = ruby1.parentNode;
+
+    // Ruby annotation is included when selecting inside ruby.
+    await copyRangeToClipboard(ruby1, 0, ruby1, 6);
+    testClipboardValue("text/unicode", "aabb(AABB)");
+
+    // Ruby annotation is ignored when selecting across ruby.
+    await copyRangeToClipboard(ruby1Container, 0, ruby1Container, 3);
+    testClipboardValue("text/unicode", "XaabbY");
+
+    // ... unless converter.html2txt.always_include_ruby is set
+    await SpecialPowers.pushPrefEnv({
+      set: [["converter.html2txt.always_include_ruby", true]],
+    });
+    await copyRangeToClipboard(ruby1Container, 0, ruby1Container, 3);
+    testClipboardValue("text/unicode", "Xaabb(AABB)Y");
+    await SpecialPowers.popPrefEnv();
+  }
 }

dom/base/test/test_copypaste.html

@@ -118,6 +118,8 @@ x.appendChild(document.createTextNode('10'))
 <table><tr id=tr1><td>foo</td><td>bar</td></tr></table>
 <table><tr id=tr2><td>1</td><td>2</td></tr><tr><td>3</td><td>4</td></tr><tr id=tr3><td>5</td><td>6</td></tr></table>
 
+<div>X<ruby id="ruby1"><rb>aa</rb><rb>bb</rb><rp>(</rp><rt>AA</rt><rt>BB</rt><rp>)</rp></ruby>Y</div>
+
 </div>
 </body>
 </html>