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apply.js
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import {applyPatch, applyPatches} from '../../lib/patch/apply';
import {parsePatch} from '../../lib/patch/parse';
import {createPatch} from '../../lib/patch/create';
import {expect} from 'chai';
import deindent from 'deindent';
describe('patch/apply', function() {
describe('#applyPatch', function() {
it('should accept parsed patches', function() {
let patch = parsePatch(
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n');
expect(applyPatch(
'line2\n'
+ 'line3\n'
+ 'line5\n',
patch))
.to.equal(
'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
expect(applyPatch(
'line2\n'
+ 'line3\n'
+ 'line5\n',
patch[0]))
.to.equal(
'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
});
it('should error if passed multiple indexes', function() {
expect(function() {
applyPatch('', [1, 2]);
}).to['throw']('applyPatch only works with a single input.');
});
it('should apply patches that change the last line', function() {
expect(applyPatch(
'line2\n'
+ 'line3\n'
+ 'line5\n',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'))
.to.equal(
'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
expect(applyPatch(
'line2\nline3\nline4\n',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ ' line4\n'
+ '+line5\n'))
.to.equal('line2\nline3\nline4\nline5\n');
expect(applyPatch(
'line1\nline2\nline3\nline4\n',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +1,4 @@\n'
+ ' line1\n'
+ ' line2\n'
+ ' line3\n'
+ '+line44\n'
+ '-line4\n'))
.to.equal('line1\nline2\nline3\nline44\n');
expect(applyPatch(
'line1\nline2\nline3\nline4\n',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +1,5 @@\n'
+ ' line1\n'
+ ' line2\n'
+ ' line3\n'
+ '+line44\n'
+ '+line5\n'
+ '-line4\n'))
.to.equal('line1\nline2\nline3\nline44\nline5\n');
});
it('should merge EOFNL', function() {
expect(applyPatch(
'line1\nline2\nline3\nline4\n',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +1,4 @@\n'
+ ' line1\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ '\\ No newline at end of file\n'
+ '-line4\n'))
.to.equal('line1\nline2\nline3\nline4');
expect(applyPatch(
'line1\nline2\nline3\nline4',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +1,4 @@\n'
+ ' line1\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ '-line4\n'
+ '\\ No newline at end of file\n'))
.to.equal('line1\nline2\nline3\nline4\n');
expect(applyPatch(
'line11\nline2\nline3\nline4',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +1,4 @@\n'
+ '+line1\n'
+ '-line11\n'
+ ' line2\n'
+ ' line3\n'
+ ' line4\n'
+ '\\ No newline at end of file\n'))
.to.equal('line1\nline2\nline3\nline4');
expect(applyPatch(
'line11\nline2\nline3\nline4\nline4\nline4\nline4',
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,5 +1,5 @@\n'
+ '+line1\n'
+ '-line11\n'
+ ' line2\n'
+ ' line3\n'
+ ' line4\n'
+ ' line4\n'))
.to.equal('line1\nline2\nline3\nline4\nline4\nline4\nline4');
});
it('should apply patches', function() {
// Create patch
const oldFile =
'value\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'remove value\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'remove value\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'value\n'
+ 'context\n'
+ 'context';
const newFile =
'new value\n'
+ 'new value 2\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'add value\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'context\n'
+ 'new value\n'
+ 'new value 2\n'
+ 'context\n'
+ 'context';
let diffFile =
'Index: testFileName\n'
+ '===================================================================\n'
+ '--- testFileName\tOld Header\n'
+ '+++ testFileName\tNew Header\n'
+ '@@ -1,5 +1,6 @@\n'
+ '+new value\n'
+ '+new value 2\n'
+ '-value\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '@@ -7,9 +8,8 @@\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '-remove value\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '@@ -17,20 +17,21 @@\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '-remove value\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '+add value\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ ' context\n'
+ '+new value\n'
+ '+new value 2\n'
+ '-value\n'
+ ' context\n'
+ ' context\n'
+ '\\ No newline at end of file\n';
expect(applyPatch(oldFile, diffFile)).to.equal(newFile);
diffFile =
'Index: testFileName\n'
+ '===================================================================\n'
+ '--- testFileName\tOld Header\n'
+ '+++ testFileName\tNew Header\n';
expect(applyPatch(oldFile, diffFile)).to.equal(oldFile);
});
it('should apply patches that lack an index header', function() {
expect(applyPatch(
'line2\n'
+ 'line3\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'))
.to.equal(
'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
});
it('should fail on mismatch', function() {
expect(applyPatch(
'line2\n'
+ 'line2\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'))
.to.equal(false);
});
it('should succeed within fuzz factor', function() {
expect(applyPatch(
'line2\n'
+ 'line2\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n',
{fuzzFactor: 1}))
.to.equal(
'line2\n'
+ 'line2\n'
+ 'line4\n'
+ 'line5\n');
});
it('should succeed when hunk needs a negative offset', function() {
expect(applyPatch(
'line1\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -3,2 +3,3 @@\n'
+ ' line1\n'
+ '+line2\n'
+ ' line3\n'))
.to.equal(
'line1\n'
+ 'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
});
it('should succeed when hunk needs a positive offset', function() {
expect(applyPatch(
'line1\n'
+ 'line2\n'
+ 'line3\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,2 +1,3 @@\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'))
.to.equal(
'line1\n'
+ 'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n');
});
it('should erase a file', function() {
expect(applyPatch(
'line1\n'
+ 'line2\n'
+ 'line3\n'
+ 'line4\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,4 +0,0 @@\n'
+ '-line1\n'
+ '-line2\n'
+ '-line3\n'
+ '-line4\n'))
.to.equal('');
});
it('should allow custom line comparison', function() {
expect(applyPatch(
'line2\n'
+ 'line2\n'
+ 'line5\n',
'--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n',
{
compareLine(lineNumber, line, operation, patchContent) {
expect(lineNumber).to.be.a('number');
if (lineNumber === 2) {
expect(line).to.equal('line2');
expect(operation).to.equal(' ');
expect(patchContent).to.equal('line3');
}
return true;
}
}))
.to.equal(
'line2\n'
+ 'line2\n'
+ 'line4\n'
+ 'line5\n');
});
it('should work with unicode newline characters', function() {
const oldtext = 'AAAAAAAAAAAAAAAA\n\n';
const newtext = 'AAAAAAAAAAAAAAAA\nBBBBBB' + String.fromCharCode(0x2028) + '\nCCCCCCCCCCCCCCCCCC\n\n';
const diffed = createPatch('test', oldtext, newtext);
expect(applyPatch(oldtext, diffed)).to.equal(newtext);
});
it('handle empty text', function() {
const oldtext = '';
const newtext = 'asdasd\n';
const diffed = createPatch('test', oldtext, newtext);
expect(applyPatch(oldtext, diffed)).to.equal(newtext);
});
it('handle two common text', function() {
const oldtext = 's';
const newtext = 'sdfsdf\n';
const diffed = createPatch('test', oldtext, newtext);
expect(applyPatch(oldtext, diffed)).to.equal(newtext);
});
});
describe('#applyPatches', function() {
const patch =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'
+ 'Index: test2\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' foo2\n'
+ ' foo3\n'
+ '+foo4\n'
+ ' foo5\n';
const contents = {
test:
'line2\n'
+ 'line3\n'
+ 'line5\n',
test2:
'foo2\n'
+ 'foo3\n'
+ 'foo5\n'
};
const expected = {
test:
'line2\n'
+ 'line3\n'
+ 'line4\n'
+ 'line5\n',
test2:
'foo2\n'
+ 'foo3\n'
+ 'foo4\n'
+ 'foo5\n'
};
it('should handle multiple files', function(done) {
applyPatches(patch, {
loadFile(index, callback) {
callback(undefined, contents[index.index]);
},
patched(index, content) {
expect(content)
.to.equal(expected[index.index])
.to.not.be.undefined;
},
complete: done
});
});
it('should handle parsed patches', function(done) {
applyPatches(parsePatch(patch), {
loadFile(index, callback) {
callback(undefined, contents[index.index]);
},
patched(index, content) {
expect(content)
.to.equal(expected[index.index])
.to.not.be.undefined;
},
complete: done
});
});
it('should propagate errors', function(done) {
applyPatches(patch, {
loadFile(index, callback) {
callback(new Error('foo'));
},
complete(err) {
expect(err).to.match(/foo/);
done();
}
});
});
it('should handle patches without Index', function(done) {
const patch =
'===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n'
+ '===================================================================\n'
+ '--- test2\theader1\n'
+ '+++ test2\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' foo2\n'
+ ' foo3\n'
+ '+foo4\n'
+ ' foo5\n';
applyPatches(patch, {
loadFile(index, callback) {
callback(undefined, contents[index.oldFileName]);
},
patched(index, content) {
expect(content)
.to.equal(expected[index.newFileName])
.to.not.be.undefined;
},
complete: done
});
});
it('should handle file names containing spaces', done => {
const patch = deindent
`===================================================================
--- test file\theader1
+++ test file\theader2
@@ -1,2 +1,3 @@
line1
+line2
line3
===================================================================
--- test file 2\theader1
+++ test file 2\theader2
@@ -1,2 +1,3 @@
foo1
+foo2
foo3
`;
const contents = {
'test file': deindent
`line1
line3
`,
'test file 2': deindent
`foo1
foo3
`
};
const expected = {
'test file': deindent
`line1
line2
line3
`,
'test file 2': deindent
`foo1
foo2
foo3
`
};
applyPatches(patch, {
loadFile(index, callback) {
callback(undefined, contents[index.oldFileName]);
},
patched(index, content) {
expect(content)
.to.equal(expected[index.newFileName])
.to.not.be.undefined;
},
complete: done
});
});
});
});