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Source file src/cmd/internal/src/pos_test.go

Documentation: cmd/internal/src

  // Copyright 2016 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package src
  
  import (
  	"fmt"
  	"testing"
  )
  
  func TestPos(t *testing.T) {
  	f0 := NewFileBase("", "")
  	f1 := NewFileBase("f1", "f1")
  	f2 := NewLinePragmaBase(Pos{}, "f2", 10)
  	f3 := NewLinePragmaBase(MakePos(f1, 10, 1), "f3", 100)
  	f4 := NewLinePragmaBase(MakePos(f3, 10, 1), "f4", 100)
  
  	// line directives from issue #19392
  	fp := NewFileBase("p.go", "p.go")
  	fc := NewLinePragmaBase(MakePos(fp, 3, 0), "c.go", 10)
  	ft := NewLinePragmaBase(MakePos(fp, 6, 0), "t.go", 20)
  	fv := NewLinePragmaBase(MakePos(fp, 9, 0), "v.go", 30)
  	ff := NewLinePragmaBase(MakePos(fp, 12, 0), "f.go", 40)
  
  	for _, test := range []struct {
  		pos    Pos
  		string string
  
  		// absolute info
  		filename  string
  		line, col uint
  
  		// relative info
  		relFilename string
  		relLine     uint
  	}{
  		{Pos{}, "<unknown line number>", "", 0, 0, "", 0},
  		{MakePos(nil, 2, 3), ":2:3", "", 2, 3, "", 2},
  		{MakePos(f0, 2, 3), ":2:3", "", 2, 3, "", 2},
  		{MakePos(f1, 1, 1), "f1:1:1", "f1", 1, 1, "f1", 1},
  		{MakePos(f2, 7, 10), "f2:16[:7:10]", "", 7, 10, "f2", 16},
  		{MakePos(f3, 12, 7), "f3:101[f1:12:7]", "f1", 12, 7, "f3", 101},
  		{MakePos(f4, 25, 1), "f4:114[f3:25:1]", "f3", 25, 1, "f4", 114},
  
  		// positions from issue #19392
  		{MakePos(fc, 4, 0), "c.go:10[p.go:4:0]", "p.go", 4, 0, "c.go", 10},
  		{MakePos(ft, 7, 0), "t.go:20[p.go:7:0]", "p.go", 7, 0, "t.go", 20},
  		{MakePos(fv, 10, 0), "v.go:30[p.go:10:0]", "p.go", 10, 0, "v.go", 30},
  		{MakePos(ff, 13, 0), "f.go:40[p.go:13:0]", "p.go", 13, 0, "f.go", 40},
  	} {
  		pos := test.pos
  		if got := pos.String(); got != test.string {
  			t.Errorf("%s: got %q", test.string, got)
  		}
  
  		// absolute info
  		if got := pos.Filename(); got != test.filename {
  			t.Errorf("%s: got filename %q; want %q", test.string, got, test.filename)
  		}
  		if got := pos.Line(); got != test.line {
  			t.Errorf("%s: got line %d; want %d", test.string, got, test.line)
  		}
  		if got := pos.Col(); got != test.col {
  			t.Errorf("%s: got col %d; want %d", test.string, got, test.col)
  		}
  
  		// relative info
  		if got := pos.RelFilename(); got != test.relFilename {
  			t.Errorf("%s: got relFilename %q; want %q", test.string, got, test.relFilename)
  		}
  		if got := pos.RelLine(); got != test.relLine {
  			t.Errorf("%s: got relLine %d; want %d", test.string, got, test.relLine)
  		}
  	}
  }
  
  func TestPredicates(t *testing.T) {
  	b1 := NewFileBase("b1", "b1")
  	b2 := NewFileBase("b2", "b2")
  	for _, test := range []struct {
  		p, q                 Pos
  		known, before, after bool
  	}{
  		{NoPos, NoPos, false, false, false},
  		{NoPos, MakePos(nil, 1, 0), false, true, false},
  		{MakePos(b1, 0, 0), NoPos, true, false, true},
  		{MakePos(nil, 1, 0), NoPos, true, false, true},
  
  		{MakePos(nil, 1, 1), MakePos(nil, 1, 1), true, false, false},
  		{MakePos(nil, 1, 1), MakePos(nil, 1, 2), true, true, false},
  		{MakePos(nil, 1, 2), MakePos(nil, 1, 1), true, false, true},
  		{MakePos(nil, 123, 1), MakePos(nil, 1, 123), true, false, true},
  
  		{MakePos(b1, 1, 1), MakePos(b1, 1, 1), true, false, false},
  		{MakePos(b1, 1, 1), MakePos(b1, 1, 2), true, true, false},
  		{MakePos(b1, 1, 2), MakePos(b1, 1, 1), true, false, true},
  		{MakePos(b1, 123, 1), MakePos(b1, 1, 123), true, false, true},
  
  		{MakePos(b1, 1, 1), MakePos(b2, 1, 1), true, true, false},
  		{MakePos(b1, 1, 1), MakePos(b2, 1, 2), true, true, false},
  		{MakePos(b1, 1, 2), MakePos(b2, 1, 1), true, true, false},
  		{MakePos(b1, 123, 1), MakePos(b2, 1, 123), true, true, false},
  
  		// special case: unknown column (column too large to represent)
  		{MakePos(nil, 1, colMax+10), MakePos(nil, 1, colMax+20), true, false, false},
  	} {
  		if got := test.p.IsKnown(); got != test.known {
  			t.Errorf("%s known: got %v; want %v", test.p, got, test.known)
  		}
  		if got := test.p.Before(test.q); got != test.before {
  			t.Errorf("%s < %s: got %v; want %v", test.p, test.q, got, test.before)
  		}
  		if got := test.p.After(test.q); got != test.after {
  			t.Errorf("%s > %s: got %v; want %v", test.p, test.q, got, test.after)
  		}
  	}
  }
  
  func TestLico(t *testing.T) {
  	for _, test := range []struct {
  		x         lico
  		string    string
  		line, col uint
  	}{
  		{0, ":0:0", 0, 0},
  		{makeLico(0, 0), ":0:0", 0, 0},
  		{makeLico(0, 1), ":0:1", 0, 1},
  		{makeLico(1, 0), ":1:0", 1, 0},
  		{makeLico(1, 1), ":1:1", 1, 1},
  		{makeLico(2, 3), ":2:3", 2, 3},
  		{makeLico(lineMax, 1), fmt.Sprintf(":%d:1", lineMax), lineMax, 1},
  		{makeLico(lineMax+1, 1), fmt.Sprintf(":%d:1", lineMax), lineMax, 1}, // line too large, stick with max. line
  		{makeLico(1, colMax), ":1", 1, colMax},
  		{makeLico(1, colMax+1), ":1", 1, 0}, // column too large
  		{makeLico(lineMax+1, colMax+1), fmt.Sprintf(":%d", lineMax), lineMax, 0},
  	} {
  		x := test.x
  		if got := format("", x.Line(), x.Col(), true); got != test.string {
  			t.Errorf("%s: got %q", test.string, got)
  		}
  	}
  }
  

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