mirror of
https://github.com/golang/go
synced 2024-09-30 22:58:34 -06:00
51e363b66d
Rather than replacing the whole file on gofmt or goimports, use the Myers diff algorithm to compute diffs for a file. We send those back as text edits. Change-Id: I4f8cce5b27d51eae1911049ea002558a84cdf1bf Reviewed-on: https://go-review.googlesource.com/c/158579 Reviewed-by: Ian Cottrell <iancottrell@google.com>
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package diff
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import (
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"reflect"
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"testing"
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)
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func TestDiff(t *testing.T) {
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for _, tt := range []struct {
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a, b []string
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lines []*Op
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operations []*Op
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}{
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{
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a: []string{"A", "B", "C", "A", "B", "B", "A"},
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b: []string{"C", "B", "A", "B", "A", "C"},
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lines: []*Op{
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&Op{Kind: Delete, Content: "A"},
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&Op{Kind: Delete, Content: "B"},
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&Op{Kind: Equal, Content: "C"},
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&Op{Kind: Insert, Content: "B"},
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&Op{Kind: Equal, Content: "A"},
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&Op{Kind: Equal, Content: "B"},
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&Op{Kind: Delete, Content: "B"},
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&Op{Kind: Equal, Content: "A"},
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&Op{Kind: Insert, Content: "C"},
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},
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operations: []*Op{
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&Op{Kind: Delete, I1: 0, I2: 1, J1: 0, J2: 0},
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&Op{Kind: Delete, I1: 1, I2: 2, J1: 0, J2: 0},
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&Op{Kind: Insert, Content: "B", I1: 3, I2: 3, J1: 1, J2: 2},
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&Op{Kind: Delete, I1: 5, I2: 6, J1: 4, J2: 4},
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&Op{Kind: Insert, Content: "C", I1: 7, I2: 7, J1: 5, J2: 6},
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},
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},
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} {
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for i, got := range Lines(tt.a, tt.b) {
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want := tt.lines[i]
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if !reflect.DeepEqual(want, got) {
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t.Errorf("expected %v, got %v", want, got)
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}
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}
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b := ApplyEdits(tt.a, tt.lines)
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for i, want := range tt.b {
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got := b[i]
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if got != want {
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t.Errorf("expected %v got %v", want, got)
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}
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}
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for i, got := range Operations(tt.a, tt.b) {
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want := tt.operations[i]
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if !reflect.DeepEqual(want, got) {
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t.Errorf("expected %v, got %v", want, got)
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}
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}
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b = ApplyEdits(tt.a, tt.operations)
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for i, want := range tt.b {
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got := b[i]
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if got != want {
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t.Errorf("expected %v got %v", want, got)
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}
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}
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}
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}
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