1 // Copyright 2020 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
12 "golang.org/x/tools/internal/lsp/diff"
13 "golang.org/x/tools/internal/lsp/diff/myers"
16 func TestImportPrefix(t *testing.T) {
17 for i, tt := range []struct {
20 {"package foo", "package foo"},
21 {"package foo\n", "package foo\n"},
22 {"package foo\n\nfunc f(){}\n", "package foo\n"},
23 {"package foo\n\nimport \"fmt\"\n", "package foo\n\nimport \"fmt\""},
24 {"package foo\nimport (\n\"fmt\"\n)\n", "package foo\nimport (\n\"fmt\"\n)"},
25 {"\n\n\npackage foo\n", "\n\n\npackage foo\n"},
26 {"// hi \n\npackage foo //xx\nfunc _(){}\n", "// hi \n\npackage foo //xx\n"},
27 {"package foo //hi\n", "package foo //hi\n"},
28 {"//hi\npackage foo\n//a\n\n//b\n", "//hi\npackage foo\n//a\n\n//b\n"},
30 "package a\n\nimport (\n \"fmt\"\n)\n//hi\n",
31 "package a\n\nimport (\n \"fmt\"\n)\n//hi\n",
33 {`package a /*hi*/`, `package a /*hi*/`},
34 {"package main\r\n\r\nimport \"go/types\"\r\n\r\n/*\r\n\r\n */\r\n", "package main\r\n\r\nimport \"go/types\"\r\n\r\n/*\r\n\r\n */\r\n"},
35 {"package x; import \"os\"; func f() {}\n\n", "package x; import \"os\""},
36 {"package x; func f() {fmt.Println()}\n\n", "package x"},
38 got := importPrefix([]byte(tt.input))
40 t.Errorf("%d: failed for %q:\n%s", i, tt.input, diffStr(t, tt.want, got))
45 func TestCRLFFile(t *testing.T) {
46 for i, tt := range []struct {
65 got := importPrefix([]byte(strings.ReplaceAll(tt.input, "\n", "\r\n")))
66 want := strings.ReplaceAll(tt.want, "\n", "\r\n")
68 t.Errorf("%d: failed for %q:\n%s", i, tt.input, diffStr(t, want, got))
73 func diffStr(t *testing.T, want, got string) string {
77 // Add newlines to avoid newline messages in diff.
80 d, err := myers.ComputeEdits("", want, got)
84 return fmt.Sprintf("%q", diff.ToUnified("want", "got", want, d))