diff options
Diffstat (limited to 'packages/markdown/marked/test/helpers/html-differ.js')
-rw-r--r-- | packages/markdown/marked/test/helpers/html-differ.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/packages/markdown/marked/test/helpers/html-differ.js b/packages/markdown/marked/test/helpers/html-differ.js new file mode 100644 index 00000000..44052be4 --- /dev/null +++ b/packages/markdown/marked/test/helpers/html-differ.js @@ -0,0 +1,38 @@ +const HtmlDiffer = require('@markedjs/html-differ').HtmlDiffer; +const htmlDiffer = new HtmlDiffer({ignoreSelfClosingSlash: true}); + +module.exports = { + isEqual: htmlDiffer.isEqual.bind(htmlDiffer), + firstDiff: (actual, expected, padding) => { + padding = padding || 30; + const result = htmlDiffer + .diffHtml(actual, expected) + .reduce((obj, diff) => { + if (diff.added) { + if (obj.firstIndex === null) { + obj.firstIndex = obj.expected.length; + } + obj.expected += diff.value; + } else if (diff.removed) { + if (obj.firstIndex === null) { + obj.firstIndex = obj.actual.length; + } + obj.actual += diff.value; + } else { + obj.actual += diff.value; + obj.expected += diff.value; + } + + return obj; + }, { + firstIndex: null, + actual: '', + expected: '' + }); + + return { + actual: result.actual.substring(result.firstIndex - padding, result.firstIndex + padding), + expected: result.expected.substring(result.firstIndex - padding, result.firstIndex + padding) + }; + } +}; |