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merge.js
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import {merge} from '../../lib/patch/merge';
import {parsePatch} from '../../lib/patch/parse';
import {expect} from 'chai';
describe('patch/merge', function() {
describe('#merge', function() {
it('should update line numbers for no conflicts', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -25,3 +25,4 @@\n'
+ ' foo2\n'
+ ' foo3\n'
+ '+foo4\n'
+ ' foo5\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 4,
lines: [
' line2',
' line3',
'+line4',
' line5'
]
},
{
oldStart: 25, oldLines: 3,
newStart: 26, newLines: 4,
lines: [
' foo2',
' foo3',
'+foo4',
' foo5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should remove identical hunks', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 4,
lines: [
' line2',
' line3',
'+line4',
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
describe('hunk merge', function() {
it('should merge adjacent additions', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4-1\n'
+ '+line4-2\n'
+ '+line4-3\n'
+ ' line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -2,2 +2,3 @@\n'
+ ' line3\n'
+ ' line5\n'
+ '+line4-4\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 7,
lines: [
' line2',
' line3',
'+line4-1',
'+line4-2',
'+line4-3',
' line5',
'+line4-4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should merge leading additions', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ '+line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -3,1 +3,2 @@\n'
+ ' line5\n'
+ '+line4\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 2,
newStart: 1, newLines: 5,
lines: [
'+line2',
' line3',
'+line4',
' line5',
'+line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should merge adjacent removals', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ '-line3\n'
+ '+line4\n'
+ ' line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -2,2 +2,3 @@\n'
+ ' line3\n'
+ ' line5\n'
+ '+line4\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 3,
lines: [
'-line2',
'-line3',
'+line4',
' line5',
'+line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should merge adjacent additions with context removal', function() {
const mine =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4-1\n'
+ '+line4-2\n'
+ '+line4-3\n'
+ '-line5\n';
const theirs =
'Index: test\n'
+ '===================================================================\n'
+ '--- test\theader1\n'
+ '+++ test\theader2\n'
+ '@@ -2,2 +2,3 @@\n'
+ ' line3\n'
+ ' line5\n'
+ '+line4-4\n';
const expected = {
index: 'test',
oldFileName: 'test',
oldHeader: 'header1',
newFileName: 'test',
newHeader: 'header2',
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 6,
lines: [
' line2',
' line3',
'+line4-1',
'+line4-2',
'+line4-3',
'-line5',
'+line4-4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should merge removal supersets', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ '-line4\n'
+ ' line5\n';
const theirs =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ ' line4\n'
+ ' line5\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 5,
newStart: 1, newLines: 3,
lines: [
' line2',
' line3',
'-line4',
'-line4',
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict removal disjoint sets', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ '-line4\n'
+ '-line4\n'
+ ' line5\n';
const theirs =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ '-line4\n'
+ '-line5\n'
+ ' line5\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 6,
newStart: 1,
newLines: 3,
lines: [
' line2',
' line3',
{
conflict: true,
mine: [
'-line4',
'-line4',
'-line4'
],
theirs: [
'-line4',
'-line4',
'-line5'
]
},
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict removal disjoint context', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ '-line4\n'
+ '-line4\n'
+ ' line5\n';
const theirs =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '-line4\n'
+ '-line4\n'
+ ' line5\n'
+ ' line5\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
newStart: 1,
newLines: 4,
lines: [
' line2',
' line3',
{
conflict: true,
mine: [
'-line4',
'-line4',
'-line4'
],
theirs: [
'-line4',
'-line4'
]
},
' line5',
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
// These are all conflicts. A conflict is anything that is on the same desired line that is not identical
it('should conflict two additions at the same line', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4-1\n'
+ '+line4-2\n'
+ '+line4-3\n'
+ ' line5\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ ' line3\n'
+ '+line4-4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 3,
newStart: 1,
lines: [
' line2',
' line3',
{
conflict: true,
mine: [
'+line4-1',
'+line4-2',
'+line4-3'
],
theirs: [
'+line4-4'
]
},
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict addition supersets', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ '+line4\n'
+ ' line5\n';
const theirs =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ ' line3\n'
+ '+line4\n'
+ ' line5\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 3,
newStart: 1,
lines: [
' line2',
' line3',
{
conflict: true,
mine: [
'+line4',
'+line4'
],
theirs: [
'+line4'
]
},
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle removal and edit (add+remove) at the same line', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ '-line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '+line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 2,
newStart: 1,
lines: [
' line2',
{
conflict: true,
mine: [
'-line3'
],
theirs: [
'-line3',
'+line4'
]
}
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) on multiple lines', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ ' line3\n'
+ ' line5\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 4,
newStart: 1, newLines: 3,
lines: [
'-line2',
'-line3',
'-line3',
'+line4',
'+line4',
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) past extents', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ ' line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '-line5\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 4,
newStart: 1, newLines: 2,
lines: [
'-line2',
'-line3',
'-line3',
'-line5',
'+line4',
'+line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) past extents', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ ' line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '-line5\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 4,
newStart: 1, newLines: 2,
lines: [
'-line2',
'-line3',
'-line3',
'-line5',
'+line4',
'+line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) context mismatch', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ ' line4\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '-line5\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
newStart: 1,
lines: [
'-line2',
{
conflict: true,
mine: [
' line3'
],
theirs: [
'-line3',
'-line3',
'-line5',
'+line4',
'+line4'
]
},
' line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) addition', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ '+line6\n'
+ ' line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '-line5\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
newStart: 1,
lines: [
'-line2',
{
conflict: true,
mine: [
' line3',
'+line6',
' line3'
],
theirs: [
'-line3',
'-line3',
'-line5',
'+line4',
'+line4'
]
}
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit (add+remove) on multiple lines with context', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ '-line3\n'
+ ' line3\n'
+ ' line5\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ '-line3\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
newStart: 1,
lines: [
' line2',
{
conflict: true,
mine: [
'-line3'
],
theirs: [
'-line3',
'-line3',
'+line4',
'+line4'
]
},
' line3', // TODO: Fix
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict edit with remove in middle', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ ' line3\n'
+ '-line3\n'
+ ' line5\n';
const theirs =
'@@ -1,3 +1,2 @@\n'
+ ' line2\n'
+ '-line3\n'
+ '-line3\n'
+ '+line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 4,
newStart: 1,
lines: [
'-line2',
{
conflict: true,
mine: [
' line3',
'-line3'
],
theirs: [
'-line3',
'-line3',
'+line4',
'+line4'
]
},
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should handle edit and addition with context connextion', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ ' line2\n'
+ '-line3\n'
+ '-line4\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ ' line3\n'
+ ' line4\n'
+ '+line4\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 2,
lines: [
' line2',
'-line3',
'-line4',
'+line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should merge removals that start in the leading section', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ '-line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ ' line4\n';
const expected = {
hunks: [
{
oldStart: 1, oldLines: 3,
newStart: 1, newLines: 1,
lines: [
'-line2',
'-line3',
' line4'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict edits that start in the leading section', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '-line2\n'
+ '-line3\n'
+ '-line3\n'
+ '-line3\n'
+ '-line3\n'
+ '+line4\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ ' line3\n'
+ ' line3\n'
+ '-line3\n'
+ '-line3\n'
+ ' line5\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
oldLines: 6,
newStart: 1,
lines: [
'-line2',
{
conflict: true,
mine: [
'-line3',
'-line3',
'-line3',
'-line3',
'+line4'
],
theirs: [
' line3',
' line3',
'-line3',
'-line3'
]
},
' line5'
]
}
]
};
expect(merge(mine, theirs)).to.eql(expected);
swapConflicts(expected);
expect(merge(theirs, mine)).to.eql(expected);
});
it('should conflict adds that start in the leading section', function() {
const mine =
'@@ -1,3 +1,4 @@\n'
+ '+line2\n'
+ '+line3\n';
const theirs =
'@@ -2 +2,2 @@\n'
+ '-line3\n'
+ ' line4\n';
const expected = {
hunks: [
{
conflict: true,
oldStart: 1,
newStart: 1,
lines: [
'+line2',
{
conflict: true,
mine: [
'+line3'
],
theirs: [
'-line3'