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