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      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 	"fmt"
      9 	"testing"
     10 )
     11 
     12 func TestLineHist(t *testing.T) {
     13 	ctxt := new(Link)
     14 	ctxt.Hash = make(map[SymVer]*LSym)
     15 
     16 	ctxt.LineHist.Push(1, "a.c")
     17 	ctxt.LineHist.Push(3, "a.h")
     18 	ctxt.LineHist.Pop(5)
     19 	ctxt.LineHist.Update(7, "linedir", 2)
     20 	ctxt.LineHist.Pop(9)
     21 	ctxt.LineHist.Push(11, "b.c")
     22 	ctxt.LineHist.Pop(13)
     23 
     24 	var expect = []string{
     25 		0:  "??:0",
     26 		1:  "a.c:1",
     27 		2:  "a.c:2",
     28 		3:  "a.h:1",
     29 		4:  "a.h:2",
     30 		5:  "a.c:3",
     31 		6:  "a.c:4",
     32 		7:  "linedir:2",
     33 		8:  "linedir:3",
     34 		9:  "??:0",
     35 		10: "??:0",
     36 		11: "b.c:1",
     37 		12: "b.c:2",
     38 		13: "??:0",
     39 		14: "??:0",
     40 	}
     41 
     42 	for i, want := range expect {
     43 		f, l := linkgetline(ctxt, int32(i))
     44 		have := fmt.Sprintf("%s:%d", f.Name, l)
     45 		if have != want {
     46 			t.Errorf("linkgetline(%d) = %q, want %q", i, have, want)
     47 		}
     48 	}
     49 }
     50