remap_test.go

Documentation: github.com/golang/protobuf/protoc-gen-go/generator/internal/remap

     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  
     5  package remap
     6  
     7  import (
     8  	"go/format"
     9  	"testing"
    10  )
    11  
    12  func 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  
    31  func TestMatching(t *testing.T) {
    32  	// The input is a source text that will be rearranged by the formatter.
    33  	const input = `package foo
    34  var s int
    35  func 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
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