1// Copyright 2017 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.
4
5package remap
6
7import (
8	"go/format"
9	"testing"
10)
11
12func TestErrors(t *testing.T) {
13	tests := []struct {
14		in, out string
15	}{
16		{"", "x"},
17		{"x", ""},
18		{"var x int = 5\n", "var x = 5\n"},
19		{"these are \"one\" thing", "those are 'another' thing"},
20	}
21	for _, test := range tests {
22		m, err := Compute([]byte(test.in), []byte(test.out))
23		if err != nil {
24			t.Logf("Got expected error: %v", err)
25			continue
26		}
27		t.Errorf("Compute(%q, %q): got %+v, wanted error", test.in, test.out, m)
28	}
29}
30
31func TestMatching(t *testing.T) {
32	// The input is a source text that will be rearranged by the formatter.
33	const input = `package foo
34var s int
35func main(){}
36`
37
38	output, err := format.Source([]byte(input))
39	if err != nil {
40		t.Fatalf("Formatting failed: %v", err)
41	}
42	m, err := Compute([]byte(input), output)
43	if err != nil {
44		t.Fatalf("Unexpected error: %v", err)
45	}
46
47	// Verify that the mapped locations have the same text.
48	for key, val := range m {
49		want := input[key.Pos:key.End]
50		got := string(output[val.Pos:val.End])
51		if got != want {
52			t.Errorf("Token at %d:%d: got %q, want %q", key.Pos, key.End, got, want)
53		}
54	}
55}
56