line_test.go

     1  // Copyright 2015 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 obj
     6  
     7  import (
     8  	"cmd/internal/src"
     9  	"fmt"
    10  	"testing"
    11  )
    12  
    13  func TestGetFileSymbolAndLine(t *testing.T) {
    14  	ctxt := new(Link)
    15  	ctxt.statichash = make(map[string]*LSym)
    16  
    17  	afile := src.NewFileBase("a.go", "a.go")
    18  	bfile := src.NewFileBase("b.go", "/foo/bar/b.go")
    19  	lfile := src.NewLinePragmaBase(src.MakePos(afile, 8, 1), "linedir", "linedir", 100, 1)
    20  
    21  	var tests = []struct {
    22  		pos  src.Pos
    23  		want string
    24  	}{
    25  		{src.NoPos, "??:0"},
    26  		{src.MakePos(afile, 1, 0), "a.go:1"},
    27  		{src.MakePos(afile, 2, 0), "a.go:2"},
    28  		{src.MakePos(bfile, 10, 4), "/foo/bar/b.go:10"},
    29  		{src.MakePos(lfile, 10, 0), "linedir:102"}, // 102 == 100 + (10 - (7+1))
    30  	}
    31  
    32  	for _, test := range tests {
    33  		fileIndex, line := ctxt.getFileIndexAndLine(ctxt.PosTable.XPos(test.pos))
    34  
    35  		file := "??"
    36  		if fileIndex >= 0 {
    37  			file = ctxt.PosTable.FileTable()[fileIndex]
    38  		}
    39  		got := fmt.Sprintf("%s:%d", file, line)
    40  
    41  		if got != test.want {
    42  			t.Errorf("ctxt.getFileSymbolAndLine(%v) = %q, want %q", test.pos, got, test.want)
    43  		}
    44  	}
    45  }
    46
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