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| 1 <!DOCTYPE html> |
| 2 <title>Test media preloading behaviour with different conditions.</title> |
| 3 <script src="../resources/testharness.js"></script> |
| 4 <script src="../resources/testharnessreport.js"></script> |
| 5 <script src="media-file.js"></script> |
| 6 <script> |
| 7 var tests = [ |
| 8 { |
| 9 name: 'regular conditions', |
| 10 conditions: { |
| 11 dataSaver: false, |
| 12 cellular: false, |
| 13 lowEndDevice: false, |
| 14 }, |
| 15 expectations: { |
| 16 default: 'auto', |
| 17 allowed: [ 'none', 'metadata', 'auto' ] |
| 18 } |
| 19 }, |
| 20 { |
| 21 name: 'cellular connections', |
| 22 conditions: { |
| 23 dataSaver: false, |
| 24 cellular: true, |
| 25 lowEndDevice: false, |
| 26 }, |
| 27 expectations: { |
| 28 default: 'metadata', |
| 29 allowed: [ 'none', 'metadata' ] |
| 30 } |
| 31 }, |
| 32 { |
| 33 name: 'cellular connections with Data Saver', |
| 34 conditions: { |
| 35 dataSaver: true, |
| 36 cellular: true, |
| 37 lowEndDevice: false, |
| 38 }, |
| 39 expectations: { |
| 40 default: 'none', |
| 41 allowed: [ 'none' ] |
| 42 } |
| 43 }, |
| 44 { |
| 45 name: 'Data Saver', |
| 46 conditions: { |
| 47 dataSaver: true, |
| 48 cellular: false, |
| 49 lowEndDevice: false, |
| 50 }, |
| 51 expectations: { |
| 52 default: 'none', |
| 53 allowed: [ 'none' ] |
| 54 } |
| 55 }, |
| 56 { |
| 57 name: 'low end device', |
| 58 conditions: { |
| 59 dataSaver: false, |
| 60 cellular: false, |
| 61 lowEndDevice: true, |
| 62 }, |
| 63 expectations: { |
| 64 default: 'none', |
| 65 allowed: [ 'none' ] |
| 66 } |
| 67 }, |
| 68 ]; |
| 69 |
| 70 function checkPreloadAttribute(media, value, expected) { |
| 71 // Use IDL attribute. |
| 72 media.removeAttribute("preload"); |
| 73 media.preload = value; |
| 74 assert_equals(media.getAttribute("preload"), value); |
| 75 assert_equals(media.preload, expected); |
| 76 |
| 77 // Use. content attribute. |
| 78 media.removeAttribute("preload"); |
| 79 media.setAttribute("preload", value); |
| 80 assert_equals(media.preload, expected); |
| 81 assert_equals(media.getAttribute("preload"), value); |
| 82 } |
| 83 |
| 84 var asyncTests = tests.map(test => async_test('Testing autoplay behaviour for '
+ test.name)); |
| 85 |
| 86 var currentTest = 0; |
| 87 function runNextTest() { |
| 88 asyncTests[currentTest].done(); |
| 89 |
| 90 ++currentTest; |
| 91 if (currentTest == tests.length) |
| 92 return; |
| 93 |
| 94 asyncTests[currentTest].step_func(runTest(asyncTests[currentTest], tests[curre
ntTest])); |
| 95 } |
| 96 |
| 97 function runTest(t, test) { |
| 98 // Sanity checks for 'conditions'. |
| 99 assert_true('dataSaver' in test.conditions); |
| 100 assert_true('cellular' in test.conditions); |
| 101 assert_true('lowEndDevice' in test.conditions); |
| 102 |
| 103 internals.settings.setDataSaverEnabled(test.conditions.dataSaver); |
| 104 if (test.conditions.cellular) |
| 105 internals.setNetworkConnectionInfoOverride(true, 'cellular3g', 2.0); |
| 106 else |
| 107 internals.clearNetworkConnectionInfoOverride(); |
| 108 internals.settings.setForcePreloadNoneForMediaElements(test.conditions.lowEndD
evice); |
| 109 |
| 110 t.add_cleanup(() => { |
| 111 internals.settings.setDataSaverEnabled(false); |
| 112 internals.clearNetworkConnectionInfoOverride(); |
| 113 internals.settings.setForcePreloadNoneForMediaElements(false); |
| 114 }); |
| 115 |
| 116 var media = document.createElement('video'); |
| 117 |
| 118 // Test IDL without any value. |
| 119 assert_equals(media.preload, test.expectations.default); |
| 120 assert_false(media.hasAttribute('preload')); |
| 121 |
| 122 // Test allowed values. |
| 123 [ 'none', 'metadata', 'auto' ].forEach(t.step_func(preload => { |
| 124 var expected = test.expectations.allowed.includes(preload) ? preload : test.
expectations.default; |
| 125 checkPreloadAttribute(media, preload, expected); |
| 126 })); |
| 127 |
| 128 // Test not allowed values. |
| 129 [ '', 'default', 'foo' ].forEach(preload => { |
| 130 checkPreloadAttribute(media, preload, test.expectations.default); |
| 131 }); |
| 132 |
| 133 // Test loading events. |
| 134 var expectedLoading = 4; |
| 135 [ '', 'none', 'metadata', 'auto' ].forEach(preload => { |
| 136 var media = document.createElement('video'); |
| 137 media.preload = preload; |
| 138 media.src = findMediaFile('video', 'content/test'); |
| 139 assert_equals(media.readyState, HTMLMediaElement.HAVE_NOTHING); |
| 140 |
| 141 switch (media.preload) { |
| 142 case 'none': |
| 143 media.onloadedmetadata = t.unreached_func(); |
| 144 media.onprogress = t.unreached_func(); |
| 145 |
| 146 media.onsuspend = t.step_func(_ => { |
| 147 assert_equals(media.readyState, HTMLMediaElement.HAVE_NOTHING); |
| 148 --expectedLoading; |
| 149 if (expectedLoading == 0) |
| 150 runNextTest(); |
| 151 }); |
| 152 break; |
| 153 case 'metadata': |
| 154 media.onloadedmetadata = t.step_func(_ => { |
| 155 assert_equals(media.readyState, HTMLMediaElement.HAVE_METADATA); |
| 156 --expectedLoading; |
| 157 if (expectedLoading == 0) |
| 158 runNextTest(); |
| 159 }); |
| 160 break; |
| 161 case 'auto': |
| 162 if (media.readyState == HTMLMediaElement.HAVE_ENOUGH_DATA) { |
| 163 --expectedLoading; |
| 164 break; |
| 165 } |
| 166 |
| 167 media.oncanplaythrough = t.step_func(_ => { |
| 168 assert_equals(media.readyState, HTMLMediaElement.HAVE_ENOUGH_DATA); |
| 169 --expectedLoading; |
| 170 if (expectedLoading == 0) |
| 171 runNextTest(); |
| 172 }); |
| 173 break; |
| 174 } |
| 175 }); |
| 176 } |
| 177 |
| 178 asyncTests[currentTest].step_func(runTest(asyncTests[currentTest], tests[current
Test])); |
| 179 |
| 180 </script> |
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Chromium Code Reviews
Issue 2466273006:
Allow metadata preload on cellular connections and disallow autoplay muted for low end devices. (Closed)
