| <!DOCTYPE html><!-- webkit-test-runner [ enableIntersectionObserver=true ] --> |
| <head> |
| <title>IntersectionObserver interface tests.</title> |
| <link rel="author" title="Simon Fraser" href="mailto:simon.fraser@apple.com" /> |
| <link rel="help" href="https://wicg.github.io/IntersectionObserver/"> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <script> |
| |
| test(function() { |
| assert_class_string(new IntersectionObserver(function() {}), 'IntersectionObserver'); |
| },'Constructor0'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}); |
| assert_equals(observer.rootMargin, '0px 0px 0px 0px'); |
| },'DefaultRootMargin'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}); |
| assert_equals(observer.root, null); |
| },'DefaultRoot'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}); |
| assert_array_equals(observer.thresholds, [0]); |
| },'DefaultThresholds'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { rootMargin: '33%' }); |
| assert_equals(observer.rootMargin, '33% 33% 33% 33%'); |
| },'ExplicitOneArgumentRootMargin'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { rootMargin: '33% 10px' }); |
| assert_equals(observer.rootMargin, '33% 10px 33% 10px'); |
| },'ExplicitTwoArgumentRootMargin'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { rootMargin: '33% 10px -120px' }); |
| assert_equals(observer.rootMargin, '33% 10px -120px 10px'); |
| },'ExplicitThreeArgumentRootMargin'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { rootMargin: '33% 10px -120px 3%' }); |
| assert_equals(observer.rootMargin, '33% 10px -120px 3%'); |
| },'ExplicitFourArgumentRootMargin'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { root: document.body }); |
| assert_equals(observer.root, document.body); |
| },'ExplicitRoot'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { threshold: 0.45 }); |
| assert_array_equals(observer.thresholds, [0.45]); |
| },'ExplicitThreshold'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { threshold: [0, 0.33333678, 0.5, 0.76645] }); |
| assert_array_equals(observer.thresholds, [0, 0.33333678, 0.5, 0.76645]); |
| },'ExplicitThresholds'); |
| test(function() { |
| var observer = new IntersectionObserver(function() {}, { threshold: Number.MIN_VALUE }); |
| assert_array_equals(observer.thresholds, [Number.MIN_VALUE]); |
| },'SmallPositiveThreshold'); |
| test(function() { |
| assert_throws(RangeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: -Number.MIN_VALUE }); |
| }) |
| },'SmallNegativeThreshold'); |
| test(function() { |
| assert_throws(RangeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: Number.MAX_VALUE }); |
| }) |
| },'LargePositiveThreshold'); |
| test(function() { |
| assert_throws(RangeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: -Number.MAX_VALUE }); |
| }) |
| },'LargeNegativeThreshold'); |
| test(function() { |
| assert_throws(TypeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: Number.POSITIVE_INFINITY }); |
| }) |
| },'PositiveInfinityThreshold'); |
| test(function() { |
| assert_throws(TypeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: Number.NEGATIVE_INFINITY }); |
| }) |
| },'NegativeInfinityThreshold'); |
| test(function() { |
| assert_throws(TypeError(), function() { |
| new IntersectionObserver(function() {}, { threshold: Number.NaN }); |
| }) |
| },'NaNThreshold'); |
| </script> |
| </body> |
| </html> |
