mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-26 07:22:21 +00:00
31 lines
872 B
TypeScript
31 lines
872 B
TypeScript
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import * as JsDiff from "diff";
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import * as chalk from "chalk";
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export function diff(filename: string, expected: string, actual: string): string | null {
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const diff = JsDiff.structuredPatch(filename, filename, expected, actual, "expected", "actual", { context: 2 });
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if (!diff.hunks.length)
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return null;
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const ret = [];
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ret.push('--- ' + diff.oldHeader);
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ret.push('+++ ' + diff.newHeader);
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for (let i = 0; i < diff.hunks.length; i++) {
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const hunk = diff.hunks[i];
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ret.push(
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'@@ -' + hunk.oldStart + ',' + hunk.oldLines
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+ ' +' + hunk.newStart + ',' + hunk.newLines
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+ ' @@'
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);
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ret.push.apply(ret, hunk.lines.map(line =>
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line.charAt(0) === "+"
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? chalk.default.green(line)
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: line.charAt(0) === "-"
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? line = chalk.default.red(line)
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: line
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));
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}
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return ret.join('\n') + '\n';
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}
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