Bug 976616 - Part 4: Add test for dynamic meta viewport updates. r=kats

2015-08-25 06:49:00 -04:00 · 2015-08-25 06:49:00 -04:00 · 5707637d7a
--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@ -753,6 +753,8 @@ skip-if = (os != 'b2g' && os != 'android')    # meta-viewport tag support is mob
 skip-if = (os != 'b2g' && os != 'android')    # meta-viewport tag support is mobile-only
 [test_meta_viewport6.html]
 skip-if = (os != 'b2g' && os != 'android')    # meta-viewport tag support is mobile-only
+[test_meta_viewport7.html]
+skip-if = (os != 'b2g' && os != 'android')    # meta-viewport tag support is mobile-only
 [test_mozfiledataurl.html]
 skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' || e10s #TIMED_OUT
 [test_mozMatchesSelector.html]
--- a/dom/base/test/test_meta_viewport7.html
+++ b/dom/base/test/test_meta_viewport7.html
@ -0,0 +1,114 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>meta viewport test</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <meta name="viewport" content="width=320">
+  <script src="viewport_helpers.js"></script>
+</head>
+<body>
+  <p>Dynamic viewport updates</p>
+  <script type="application/javascript;version=1.7">
+    "use strict";
+
+    SimpleTest.waitForExplicitFinish();
+
+    let tests = [];
+
+    tests.push(function test1() {
+      SpecialPowers.pushPrefEnv(scaleRatio(1.0),
+        function() {
+          updateViewport("width=device-width");
+          let info = getViewportInfo(800, 480);
+          is(info.defaultZoom, 1,    "initial zoom is 100%");
+          is(info.width,       800,  "width is the same as the displayWidth");
+          is(info.height,      480,  "height is the same as the displayHeight");
+          is(info.autoSize,    true, "width=device-width enables autoSize");
+          is(info.allowZoom,   true, "zooming is enabled by default");
+
+          info = getViewportInfo(900, 600);
+          is(info.width,       900,  "changing the displayWidth changes the width");
+          is(info.height,      600,  "changing the displayHeight changes the height");
+
+          nextTest();
+        });
+    });
+
+    tests.push(function test2() {
+      SpecialPowers.pushPrefEnv(scaleRatio(1.0),
+        function() {
+          updateViewport("width=320");
+          let info = getViewportInfo(800, 80);
+          is(info.defaultZoom, 2.5,   "initial zoom fits the displayWidth");
+          is(info.width,       320,   "width is set explicitly");
+          is(info.height,      40,   "height is at the absolute minimum");
+          is(info.autoSize,    false, "width=device-width enables autoSize");
+          is(info.allowZoom,   true,  "zooming is enabled by default");
+
+          info = getViewportInfo(480, 800);
+          is(info.defaultZoom, 1.5,   "initial zoom fits the new displayWidth");
+          is(info.width,       320,   "explicit width is unchanged");
+          is(info.height,      533,   "height changes proportional to displayHeight");
+
+          nextTest();
+        });
+    });
+
+    tests.push(function test3() {
+      SpecialPowers.pushPrefEnv(scaleRatio(1.0),
+        function() {
+          updateViewport("user-scalable=no");
+          let info = getViewportInfo(800, 480);
+          is(info.allowZoom,   false, "zooming is explicitly disabled");
+
+          nextTest();
+        });
+    });
+
+    tests.push(function test4() {
+      SpecialPowers.pushPrefEnv(scaleRatio(1.0),
+        function() {
+          updateViewport("user-scalable=yes");
+          let info = getViewportInfo(800, 480);
+          is(info.allowZoom,   true,  "zooming is explicitly allowed");
+
+          nextTest();
+        });
+    });
+
+    function getViewportInfo(aDisplayWidth, aDisplayHeight) {
+      let defaultZoom = {}, allowZoom = {}, minZoom = {}, maxZoom = {},
+          width = {}, height = {}, autoSize = {};
+
+      let cwu = SpecialPowers.getDOMWindowUtils(window);
+      cwu.getViewportInfo(aDisplayWidth, aDisplayHeight, defaultZoom, allowZoom,
+                          minZoom, maxZoom, width, height, autoSize);
+      return {
+        defaultZoom: defaultZoom.value,
+        minZoom: minZoom.value,
+        maxZoom: maxZoom.value,
+        width: width.value,
+        height: height.value,
+        autoSize: autoSize.value,
+        allowZoom: allowZoom.value
+      };
+    }
+
+    function updateViewport(content) {
+      let meta = document.querySelector("meta[name=viewport]");
+      meta.content = content;
+    }
+
+    function nextTest() {
+      if (tests.length) {
+        (tests.shift())();
+      } else {
+        SimpleTest.finish();
+      }
+    }
+    addEventListener("load", nextTest);
+  </script>
+</body>
+</html>