testing_test.go

Documentation: cmd/compile/internal/syntax

     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.
     4  
     5  package syntax
     6  
     7  import (
     8  	"fmt"
     9  	"regexp"
    10  	"strings"
    11  	"testing"
    12  )
    13  
    14  func TestCommentMap(t *testing.T) {
    15  	const src = `/* ERROR "0:0" */ /* ERROR "0:0" */ // ERROR "0:0"
    16  // ERROR "0:0"
    17  x /* ERROR "3:1" */                // ignore automatically inserted semicolon here
    18  /* ERROR "3:1" */                  // position of x on previous line
    19     x /* ERROR "5:4" */ ;           // do not ignore this semicolon
    20  /* ERROR "5:24" */                 // position of ; on previous line
    21  	package /* ERROR "7:2" */  // indented with tab
    22          import  /* ERROR "8:9" */  // indented with blanks
    23  `
    24  	m := CommentMap(strings.NewReader(src), regexp.MustCompile("^ ERROR "))
    25  	found := 0 // number of errors found
    26  	for line, errlist := range m {
    27  		for _, err := range errlist {
    28  			if err.Pos.Line() != line {
    29  				t.Errorf("%v: got map line %d; want %d", err, err.Pos.Line(), line)
    30  				continue
    31  			}
    32  			// err.Pos.Line() == line
    33  
    34  			got := strings.TrimSpace(err.Msg[len(" ERROR "):])
    35  			want := fmt.Sprintf(`"%d:%d"`, line, err.Pos.Col())
    36  			if got != want {
    37  				t.Errorf("%v: got msg %q; want %q", err, got, want)
    38  				continue
    39  			}
    40  			found++
    41  		}
    42  	}
    43  
    44  	want := strings.Count(src, " ERROR ")
    45  	if found != want {
    46  		t.Errorf("CommentMap got %d errors; want %d", found, want)
    47  	}
    48  }
    49
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