HighlightRegistry-iteration-with-modifications.html (8523B)
1 <!doctype html> 2 <title>HighlightRegistry iteration with insertions and deletions inbetween</title> 3 <link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script> 7 'use strict'; 8 let customHighlight1 = new Highlight(); 9 let customHighlight2 = new Highlight(); 10 let highlightName1 = "example1"; 11 let highlightName2 = "example2"; 12 13 // Test insertions using .add 14 test(() => { 15 let iterator = CSS.highlights[Symbol.iterator](); 16 CSS.highlights.set(highlightName1, customHighlight1); 17 let element = iterator.next(); 18 assert_true(element.done, 'The iteration ends although we added a new Highlight after starting the iteration'); 19 assert_equals(element.value, undefined, 'A Highlight added after starting the iteration is not found during the current iteration'); 20 }, 'HighlightRegistry iteration is not modified when a new Highlight is added after starting the iteration'); 21 22 CSS.highlights.clear(); 23 24 test(() => { 25 CSS.highlights.set(highlightName1, customHighlight1); 26 let iterator = CSS.highlights[Symbol.iterator](); 27 CSS.highlights.set(highlightName2, customHighlight2); 28 let element = iterator.next(); 29 assert_false(element.done, 'The iteration doesn\'t end although there was a second Highlight added to the HighlightRegistry after starting the iteration'); 30 assert_equals(element.value[0], highlightName1, 'The highlight name that was pointed to by the iterator is returned although a second Highlight was added after starting the iteration'); 31 assert_equals(element.value[1], customHighlight1, 'The Highlight that was pointed to by the iterator is returned although a second Highlight was added after starting the iteration'); 32 element = iterator.next(); 33 assert_true(element.done, 'The iteration ends after going through all the Highlights that were in the HighlightRegistry when the iteration started although there was a Highlight addition after starting the iteration'); 34 assert_equals(element.value, undefined, 'A Highlight added after starting the iteration is not found during the current iteration'); 35 }, 'HighlightRegistry iteration is not modified when a new Highlight is added after starting the iteration with one Highlight in the HighlightRegistry'); 36 37 CSS.highlights.clear(); 38 39 // Test deletions using .delete 40 test(() => { 41 CSS.highlights.set(highlightName1, customHighlight1); 42 let iterator = CSS.highlights[Symbol.iterator](); 43 CSS.highlights.delete(highlightName1); 44 let element = iterator.next(); 45 assert_false(element.done, 'The iteration doesn\'t end although the Highlight that was pointed to by the iterator was deleted'); 46 assert_equals(element.value[0], highlightName1, 'The highlight name that was pointed to by the iterator is returned although it was deleted after starting the iteration'); 47 assert_equals(element.value[1], customHighlight1, 'The Highlight that was pointed to by the iterator is returned although it was deleted after starting the iteration'); 48 element = iterator.next(); 49 assert_true(element.done, 'The iteration ends after going through all the highlights although the Highlight that was pointed to by the iterator was deleted after starting the iteration'); 50 assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends'); 51 }, 'HighlightRegistry iteration is not modified when the Highlight that was pointed to by the iterator was deleted after starting the iteration'); 52 53 CSS.highlights.clear(); 54 55 test(() => { 56 CSS.highlights.set(highlightName1, customHighlight1); 57 CSS.highlights.set(highlightName2, customHighlight2); 58 let iterator = CSS.highlights[Symbol.iterator](); 59 CSS.highlights.delete(highlightName2); 60 let element = iterator.next(); 61 assert_false(element.done, 'The iteration doesn\'t end although the Highlight following to the one that was pointed to by the iterator was deleted'); 62 assert_equals(element.value[0], highlightName1, 'The highlight name that was pointed to by the iterator is returned as it should although the next Highlight was deleted immediately after starting the iteration'); 63 assert_equals(element.value[1], customHighlight1, 'The Highlight that was pointed to by the iterator is returned as it should although the next Highlight was deleted immediately after starting the iteration'); 64 element = iterator.next(); 65 assert_false(element.done, 'The iteration doesn\'t end when you call .next twice since the beginning of the iteration although the second Highlight was deleted'); 66 assert_equals(element.value[0], highlightName2, 'The highlight name that was pointed to by the iterator is returned as it should although the next Highlight was deleted immediately after starting the iteration'); 67 assert_equals(element.value[1], customHighlight2, 'The Highlight that was pointed to by the iterator is returned as it should although the next Highlight was deleted immediately after starting the iteration'); 68 element = iterator.next(); 69 assert_true(element.done, 'The iteration ends after going through all the highlights although the second Highlight was deleted immediately after starting the iteration'); 70 assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends'); 71 }, 'HighlightRegistry iteration is not modified when the Highlight that was immediately after the one pointed to by the iterator was deleted after starting the iteration'); 72 73 CSS.highlights.clear(); 74 75 test(() => { 76 CSS.highlights.set(highlightName1, customHighlight1); 77 CSS.highlights.set(highlightName2, customHighlight2); 78 let iterator = CSS.highlights[Symbol.iterator](); 79 let element = iterator.next(); 80 assert_false(element.done, 'The iteration doesn\'t end when there are still two Highlights to visit'); 81 assert_equals(element.value[0], highlightName1, 'The highlight name that was pointed to by the iterator is returned as it should'); 82 assert_equals(element.value[1], customHighlight1, 'The Highlight that was pointed to by the iterator is returned as it should'); 83 CSS.highlights.delete(highlightName1); 84 element = iterator.next(); 85 assert_false(element.done, 'The iteration doesn\'t end when the Highlight previously visited is deleted and there is still a Highlight to visit'); 86 assert_equals(element.value[0], highlightName2, 'The highlight name that was pointed to by the iterator is returned as it should although the previous Highlight was deleted after calling .next'); 87 assert_equals(element.value[1], customHighlight2, 'The Highlight that was pointed to by the iterator is returned as it should although the previous Highlight was deleted after calling .next'); 88 element = iterator.next(); 89 assert_true(element.done, 'The iteration ends after going through all the highlights although the first Highlight was deleted after the first call to .next'); 90 assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends'); 91 }, 'HighlightRegistry iteration is not modified when a Highlight that was already visited is deleted and there are still Highlights to visit'); 92 93 CSS.highlights.clear(); 94 95 // Test deletions using .clear 96 test(() => { 97 CSS.highlights.set(highlightName1, customHighlight1); 98 let iterator = CSS.highlights[Symbol.iterator](); 99 CSS.highlights.clear(); 100 let element = iterator.next(); 101 assert_false(element.done, 'The iteration doesn\'t end although the Highlight that was pointed to by the iterator was deleted using .clear()'); 102 assert_equals(element.value[0], highlightName1, 'The highlight name that was pointed to by the iterator is returned although it was deleted using .clear() after starting the iteration'); 103 assert_equals(element.value[1], customHighlight1, 'The Highlight that was pointed to by the iterator is returned although it was deleted using .clear() after starting the iteration'); 104 element = iterator.next(); 105 assert_true(element.done, 'The iteration ends after going through all the highlights although the Highlight that was pointed to by the iterator was deleted using .clear() after starting the iteration'); 106 assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends'); 107 }, 'HighlightRegistry iteration is not modified when the Highlight that was pointed to by the iterator was deleted using .clear() after starting the iteration'); 108 109 </script>