85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
import { computeDiff } from '~/ide/lib/diff/diff';
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describe('Multi-file editor library diff calculator', () => {
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describe('computeDiff', () => {
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it('returns empty array if no changes', () => {
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const diff = computeDiff('123', '123');
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expect(diff).toEqual([]);
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});
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describe('modified', () => {
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it.each`
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originalContent | newContent | lineNumber
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${'123'} | ${'1234'} | ${1}
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${'123\n123\n123'} | ${'123\n1234\n123'} | ${2}
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`(
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'marks line $lineNumber as added and modified but not removed',
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({ originalContent, newContent, lineNumber }) => {
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const diff = computeDiff(originalContent, newContent)[0];
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expect(diff.added).toBeTruthy();
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expect(diff.modified).toBeTruthy();
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expect(diff.removed).toBeUndefined();
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expect(diff.lineNumber).toBe(lineNumber);
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},
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);
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});
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describe('added', () => {
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it.each`
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originalContent | newContent | lineNumber
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${'123'} | ${'123\n123'} | ${1}
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${'123\n123\n123'} | ${'123\n123\n1234\n123'} | ${3}
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`(
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'marks line $lineNumber as added but not modified and not removed',
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({ originalContent, newContent, lineNumber }) => {
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const diff = computeDiff(originalContent, newContent)[0];
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expect(diff.added).toBeTruthy();
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expect(diff.modified).toBeUndefined();
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expect(diff.removed).toBeUndefined();
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expect(diff.lineNumber).toBe(lineNumber);
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},
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);
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});
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describe('removed', () => {
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it.each`
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originalContent | newContent | lineNumber | modified
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${'123'} | ${''} | ${1} | ${undefined}
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${'123\n123\n123'} | ${'123\n123'} | ${2} | ${true}
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`(
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'marks line $lineNumber as removed',
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({ originalContent, newContent, lineNumber, modified }) => {
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const diff = computeDiff(originalContent, newContent)[0];
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expect(diff.added).toBeUndefined();
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expect(diff.modified).toBe(modified);
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expect(diff.removed).toBeTruthy();
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expect(diff.lineNumber).toBe(lineNumber);
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},
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);
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});
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it('includes line number of change', () => {
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const diff = computeDiff('123', '')[0];
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expect(diff.lineNumber).toBe(1);
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});
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it('includes end line number of change', () => {
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const diff = computeDiff('123', '')[0];
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expect(diff.endLineNumber).toBe(1);
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});
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it('disregards changes for EOL type changes', () => {
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const text1 = 'line1\nline2\nline3\n';
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const text2 = 'line1\r\nline2\r\nline3\r\n';
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expect(computeDiff(text1, text2)).toEqual([]);
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expect(computeDiff(text2, text1)).toEqual([]);
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});
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});
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});
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