1 files changed, 76 insertions, 0 deletions
diff --git a/browser/components/preferences/in-content/tests/browser_basic_rebuild_fonts_test.js b/browser/components/preferences/in-content/tests/browser_basic_rebuild_fonts_test.js
new file mode 100644
index 000000000..32c1bd726
--- /dev/null
+++ b/browser/components/preferences/in-content/tests/browser_basic_rebuild_fonts_test.js
@@ -0,0 +1,76 @@
+Services.prefs.setBoolPref("browser.preferences.instantApply", true);
+
+registerCleanupFunction(function() {
+  Services.prefs.clearUserPref("browser.preferences.instantApply");
+});
+
+add_task(function*() {
+  yield openPreferencesViaOpenPreferencesAPI("paneContent", null, {leaveOpen: true});
+  let doc = gBrowser.contentDocument;
+  var langGroup = Services.prefs.getComplexValue("font.language.group", Ci.nsIPrefLocalizedString).data
+  is(doc.getElementById("font.language.group").value, langGroup,
+     "Language group should be set correctly.");
+
+  let defaultFontType = Services.prefs.getCharPref("font.default." + langGroup);
+  let fontFamily = Services.prefs.getCharPref("font.name." + defaultFontType + "." + langGroup);
+  let fontFamilyField = doc.getElementById("defaultFont");
+  is(fontFamilyField.value, fontFamily, "Font family should be set correctly.");
+
+  let defaultFontSize = Services.prefs.getIntPref("font.size.variable." + langGroup);
+  let fontSizeField = doc.getElementById("defaultFontSize");
+  is(fontSizeField.value, defaultFontSize, "Font size should be set correctly.");
+
+  doc.getElementById("advancedFonts").click();
+  let win = yield promiseLoadSubDialog("chrome://browser/content/preferences/fonts.xul");
+  doc = win.document;
+
+  // Simulate a dumb font backend.
+  win.FontBuilder._enumerator = {
+    _list: ["MockedFont1", "MockedFont2", "MockedFont3"],
+    EnumerateFonts: function(lang, type, list) {
+      return this._list;
+    },
+    EnumerateAllFonts: function() {
+      return this._list;
+    },
+    getDefaultFont: function() { return null; },
+    getStandardFamilyName: function(name) { return name; },
+  };
+  win.FontBuilder._allFonts = null;
+  win.FontBuilder._langGroupSupported = false;
+
+  let langGroupElement = doc.getElementById("font.language.group");
+  let selectLangsField = doc.getElementById("selectLangs");
+  let serifField = doc.getElementById("serif");
+  let armenian = "x-armn";
+  let western = "x-western";
+
+  langGroupElement.value = armenian;
+  selectLangsField.value = armenian;
+  is(serifField.value, "", "Font family should not be set.");
+
+  langGroupElement.value = western;
+  selectLangsField.value = western;
+
+  // Simulate a font backend supporting language-specific enumeration.
+  // NB: FontBuilder has cached the return value from EnumerateAllFonts(),
+  // so _allFonts will always have 3 elements regardless of subsequent
+  // _list changes.
+  win.FontBuilder._enumerator._list = ["MockedFont2"];
+
+  langGroupElement.value = armenian;
+  selectLangsField.value = armenian;
+  is(serifField.value, "MockedFont2", "Font family should be set.");
+
+  langGroupElement.value = western;
+  selectLangsField.value = western;
+
+  // Simulate a system that has no fonts for the specified language.
+  win.FontBuilder._enumerator._list = [];
+
+  langGroupElement.value = armenian;
+  selectLangsField.value = armenian;
+  is(serifField.value, "", "Font family should not be set.");
+
+  gBrowser.removeCurrentTab();
+});