+++ /dev/null
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package difftest supplies a set of tests that will operate on any
-// implementation of a diff algorithm as exposed by
-// "golang.org/x/tools/internal/lsp/diff"
-package difftest
-
-import (
- "fmt"
- "testing"
-
- "golang.org/x/tools/internal/lsp/diff"
- "golang.org/x/tools/internal/span"
-)
-
-const (
- FileA = "from"
- FileB = "to"
- UnifiedPrefix = "--- " + FileA + "\n+++ " + FileB + "\n"
-)
-
-var TestCases = []struct {
- Name, In, Out, Unified string
- Edits, LineEdits []diff.TextEdit
- NoDiff bool
-}{{
- Name: "empty",
- In: "",
- Out: "",
-}, {
- Name: "no_diff",
- In: "gargantuan\n",
- Out: "gargantuan\n",
-}, {
- Name: "replace_all",
- In: "fruit\n",
- Out: "cheese\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--fruit
-+cheese
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(0, 5), NewText: "cheese"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 6), NewText: "cheese\n"}},
-}, {
- Name: "insert_rune",
- In: "gord\n",
- Out: "gourd\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--gord
-+gourd
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(2, 2), NewText: "u"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 5), NewText: "gourd\n"}},
-}, {
- Name: "delete_rune",
- In: "groat\n",
- Out: "goat\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--groat
-+goat
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(1, 2), NewText: ""}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 6), NewText: "goat\n"}},
-}, {
- Name: "replace_rune",
- In: "loud\n",
- Out: "lord\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--loud
-+lord
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(2, 3), NewText: "r"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 5), NewText: "lord\n"}},
-}, {
- Name: "replace_partials",
- In: "blanket\n",
- Out: "bunker\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--blanket
-+bunker
-`[1:],
- Edits: []diff.TextEdit{
- {Span: newSpan(1, 3), NewText: "u"},
- {Span: newSpan(6, 7), NewText: "r"},
- },
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 8), NewText: "bunker\n"}},
-}, {
- Name: "insert_line",
- In: "1: one\n3: three\n",
- Out: "1: one\n2: two\n3: three\n",
- Unified: UnifiedPrefix + `
-@@ -1,2 +1,3 @@
- 1: one
-+2: two
- 3: three
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(7, 7), NewText: "2: two\n"}},
-}, {
- Name: "replace_no_newline",
- In: "A",
- Out: "B",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--A
-\ No newline at end of file
-+B
-\ No newline at end of file
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(0, 1), NewText: "B"}},
-}, {
- Name: "add_end",
- In: "A",
- Out: "AB",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--A
-\ No newline at end of file
-+AB
-\ No newline at end of file
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(1, 1), NewText: "B"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 1), NewText: "AB"}},
-}, {
- Name: "add_newline",
- In: "A",
- Out: "A\n",
- Unified: UnifiedPrefix + `
-@@ -1 +1 @@
--A
-\ No newline at end of file
-+A
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(1, 1), NewText: "\n"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(0, 1), NewText: "A\n"}},
-}, {
- Name: "delete_front",
- In: "A\nB\nC\nA\nB\nB\nA\n",
- Out: "C\nB\nA\nB\nA\nC\n",
- Unified: UnifiedPrefix + `
-@@ -1,7 +1,6 @@
--A
--B
- C
-+B
- A
- B
--B
- A
-+C
-`[1:],
- Edits: []diff.TextEdit{
- {Span: newSpan(0, 4), NewText: ""},
- {Span: newSpan(6, 6), NewText: "B\n"},
- {Span: newSpan(10, 12), NewText: ""},
- {Span: newSpan(14, 14), NewText: "C\n"},
- },
- NoDiff: true, // diff algorithm produces different delete/insert pattern
-},
- {
- Name: "replace_last_line",
- In: "A\nB\n",
- Out: "A\nC\n\n",
- Unified: UnifiedPrefix + `
-@@ -1,2 +1,3 @@
- A
--B
-+C
-+
-`[1:],
- Edits: []diff.TextEdit{{Span: newSpan(2, 3), NewText: "C\n"}},
- LineEdits: []diff.TextEdit{{Span: newSpan(2, 4), NewText: "C\n\n"}},
- },
- {
- Name: "mulitple_replace",
- In: "A\nB\nC\nD\nE\nF\nG\n",
- Out: "A\nH\nI\nJ\nE\nF\nK\n",
- Unified: UnifiedPrefix + `
-@@ -1,7 +1,7 @@
- A
--B
--C
--D
-+H
-+I
-+J
- E
- F
--G
-+K
-`[1:],
- Edits: []diff.TextEdit{
- {Span: newSpan(2, 8), NewText: "H\nI\nJ\n"},
- {Span: newSpan(12, 14), NewText: "K\n"},
- },
- NoDiff: true, // diff algorithm produces different delete/insert pattern
- },
-}
-
-func init() {
- // expand all the spans to full versions
- // we need them all to have their line number and column
- for _, tc := range TestCases {
- c := span.NewContentConverter("", []byte(tc.In))
- for i := range tc.Edits {
- tc.Edits[i].Span, _ = tc.Edits[i].Span.WithAll(c)
- }
- for i := range tc.LineEdits {
- tc.LineEdits[i].Span, _ = tc.LineEdits[i].Span.WithAll(c)
- }
- }
-}
-
-func DiffTest(t *testing.T, compute diff.ComputeEdits) {
- t.Helper()
- for _, test := range TestCases {
- t.Run(test.Name, func(t *testing.T) {
- t.Helper()
- edits := compute(span.URIFromPath("/"+test.Name), test.In, test.Out)
- got := diff.ApplyEdits(test.In, edits)
- unified := fmt.Sprint(diff.ToUnified(FileA, FileB, test.In, edits))
- if got != test.Out {
- t.Errorf("got patched:\n%v\nfrom diff:\n%v\nexpected:\n%v", got, unified, test.Out)
- }
- if !test.NoDiff && unified != test.Unified {
- t.Errorf("got diff:\n%v\nexpected:\n%v", unified, test.Unified)
- }
- })
- }
-}
-
-func newSpan(start, end int) span.Span {
- return span.New("", span.NewPoint(0, 0, start), span.NewPoint(0, 0, end))
-}
projects / dotfiles / .git / blobdiff