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

Documentation: cmd/internal/src

     1  // Copyright 2016 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 src
     6  
     7  import (
     8  	"fmt"
     9  	"testing"
    10  )
    11  
    12  func TestPos(t *testing.T) {
    13  	f0 := NewFileBase("", "")
    14  	f1 := NewFileBase("f1", "f1")
    15  	f2 := NewLinePragmaBase(Pos{}, "f2", "f2", 10, 0)
    16  	f3 := NewLinePragmaBase(MakePos(f1, 10, 1), "f3", "f3", 100, 1)
    17  	f4 := NewLinePragmaBase(MakePos(f3, 10, 1), "f4", "f4", 100, 1)
    18  
    19  	// line directives with non-1 columns
    20  	f5 := NewLinePragmaBase(MakePos(f1, 5, 5), "f5", "f5", 10, 1)
    21  
    22  	// line directives from issue #19392
    23  	fp := NewFileBase("p.go", "p.go")
    24  	fc := NewLinePragmaBase(MakePos(fp, 4, 1), "c.go", "c.go", 10, 1)
    25  	ft := NewLinePragmaBase(MakePos(fp, 7, 1), "t.go", "t.go", 20, 1)
    26  	fv := NewLinePragmaBase(MakePos(fp, 10, 1), "v.go", "v.go", 30, 1)
    27  	ff := NewLinePragmaBase(MakePos(fp, 13, 1), "f.go", "f.go", 40, 1)
    28  
    29  	for _, test := range []struct {
    30  		pos    Pos
    31  		string string
    32  
    33  		// absolute info
    34  		filename  string
    35  		line, col uint
    36  
    37  		// relative info
    38  		relFilename     string
    39  		relLine, relCol uint
    40  	}{
    41  		{Pos{}, "<unknown line number>", "", 0, 0, "", 0, 0},
    42  		{MakePos(nil, 2, 3), ":2:3", "", 2, 3, "", 0, 0},
    43  		{MakePos(f0, 2, 3), ":2:3", "", 2, 3, "", 2, 3},
    44  		{MakePos(f1, 1, 1), "f1:1:1", "f1", 1, 1, "f1", 1, 1},
    45  		{MakePos(f2, 7, 10), "f2:17[:7:10]", "", 7, 10, "f2", 17, 0 /* line base doesn't specify a column */},
    46  		{MakePos(f3, 12, 7), "f3:102:7[f1:12:7]", "f1", 12, 7, "f3", 102, 7},
    47  		{MakePos(f4, 25, 1), "f4:115:1[f3:25:1]", "f3", 25, 1, "f4", 115, 1},
    48  
    49  		// line directives with non-1 columns
    50  		{MakePos(f5, 5, 5), "f5:10:1[f1:5:5]", "f1", 5, 5, "f5", 10, 1},
    51  		{MakePos(f5, 5, 10), "f5:10:6[f1:5:10]", "f1", 5, 10, "f5", 10, 6},
    52  		{MakePos(f5, 6, 10), "f5:11:10[f1:6:10]", "f1", 6, 10, "f5", 11, 10},
    53  
    54  		// positions from issue #19392
    55  		{MakePos(fc, 4, 1), "c.go:10:1[p.go:4:1]", "p.go", 4, 1, "c.go", 10, 1},
    56  		{MakePos(ft, 7, 1), "t.go:20:1[p.go:7:1]", "p.go", 7, 1, "t.go", 20, 1},
    57  		{MakePos(fv, 10, 1), "v.go:30:1[p.go:10:1]", "p.go", 10, 1, "v.go", 30, 1},
    58  		{MakePos(ff, 13, 1), "f.go:40:1[p.go:13:1]", "p.go", 13, 1, "f.go", 40, 1},
    59  	} {
    60  		pos := test.pos
    61  		if got := pos.String(); got != test.string {
    62  			t.Errorf("%s: got %q", test.string, got)
    63  		}
    64  
    65  		// absolute info
    66  		if got := pos.Filename(); got != test.filename {
    67  			t.Errorf("%s: got filename %q; want %q", test.string, got, test.filename)
    68  		}
    69  		if got := pos.Line(); got != test.line {
    70  			t.Errorf("%s: got line %d; want %d", test.string, got, test.line)
    71  		}
    72  		if got := pos.Col(); got != test.col {
    73  			t.Errorf("%s: got col %d; want %d", test.string, got, test.col)
    74  		}
    75  
    76  		// relative info
    77  		if got := pos.RelFilename(); got != test.relFilename {
    78  			t.Errorf("%s: got relFilename %q; want %q", test.string, got, test.relFilename)
    79  		}
    80  		if got := pos.RelLine(); got != test.relLine {
    81  			t.Errorf("%s: got relLine %d; want %d", test.string, got, test.relLine)
    82  		}
    83  		if got := pos.RelCol(); got != test.relCol {
    84  			t.Errorf("%s: got relCol %d; want %d", test.string, got, test.relCol)
    85  		}
    86  	}
    87  }
    88  
    89  func TestPredicates(t *testing.T) {
    90  	b1 := NewFileBase("b1", "b1")
    91  	b2 := NewFileBase("b2", "b2")
    92  	for _, test := range []struct {
    93  		p, q                 Pos
    94  		known, before, after bool
    95  	}{
    96  		{NoPos, NoPos, false, false, false},
    97  		{NoPos, MakePos(nil, 1, 0), false, true, false},
    98  		{MakePos(b1, 0, 0), NoPos, true, false, true},
    99  		{MakePos(nil, 1, 0), NoPos, true, false, true},
   100  
   101  		{MakePos(nil, 1, 1), MakePos(nil, 1, 1), true, false, false},
   102  		{MakePos(nil, 1, 1), MakePos(nil, 1, 2), true, true, false},
   103  		{MakePos(nil, 1, 2), MakePos(nil, 1, 1), true, false, true},
   104  		{MakePos(nil, 123, 1), MakePos(nil, 1, 123), true, false, true},
   105  
   106  		{MakePos(b1, 1, 1), MakePos(b1, 1, 1), true, false, false},
   107  		{MakePos(b1, 1, 1), MakePos(b1, 1, 2), true, true, false},
   108  		{MakePos(b1, 1, 2), MakePos(b1, 1, 1), true, false, true},
   109  		{MakePos(b1, 123, 1), MakePos(b1, 1, 123), true, false, true},
   110  
   111  		{MakePos(b1, 1, 1), MakePos(b2, 1, 1), true, true, false},
   112  		{MakePos(b1, 1, 1), MakePos(b2, 1, 2), true, true, false},
   113  		{MakePos(b1, 1, 2), MakePos(b2, 1, 1), true, true, false},
   114  		{MakePos(b1, 123, 1), MakePos(b2, 1, 123), true, true, false},
   115  
   116  		// special case: unknown column (column too large to represent)
   117  		{MakePos(nil, 1, colMax+10), MakePos(nil, 1, colMax+20), true, false, false},
   118  	} {
   119  		if got := test.p.IsKnown(); got != test.known {
   120  			t.Errorf("%s known: got %v; want %v", test.p, got, test.known)
   121  		}
   122  		if got := test.p.Before(test.q); got != test.before {
   123  			t.Errorf("%s < %s: got %v; want %v", test.p, test.q, got, test.before)
   124  		}
   125  		if got := test.p.After(test.q); got != test.after {
   126  			t.Errorf("%s > %s: got %v; want %v", test.p, test.q, got, test.after)
   127  		}
   128  	}
   129  }
   130  
   131  func TestLico(t *testing.T) {
   132  	for _, test := range []struct {
   133  		x         lico
   134  		string    string
   135  		line, col uint
   136  	}{
   137  		{0, ":0", 0, 0},
   138  		{makeLico(0, 0), ":0", 0, 0},
   139  		{makeLico(0, 1), ":0:1", 0, 1},
   140  		{makeLico(1, 0), ":1", 1, 0},
   141  		{makeLico(1, 1), ":1:1", 1, 1},
   142  		{makeLico(2, 3), ":2:3", 2, 3},
   143  		{makeLico(lineMax, 1), fmt.Sprintf(":%d:1", lineMax), lineMax, 1},
   144  		{makeLico(lineMax+1, 1), fmt.Sprintf(":%d:1", lineMax), lineMax, 1}, // line too large, stick with max. line
   145  		{makeLico(1, colMax), ":1", 1, colMax},
   146  		{makeLico(1, colMax+1), ":1", 1, 0}, // column too large
   147  		{makeLico(lineMax+1, colMax+1), fmt.Sprintf(":%d", lineMax), lineMax, 0},
   148  	} {
   149  		x := test.x
   150  		if got := format("", x.Line(), x.Col(), true); got != test.string {
   151  			t.Errorf("%s: got %q", test.string, got)
   152  		}
   153  	}
   154  }
   155  
   156  func TestIsStmt(t *testing.T) {
   157  	def := fmt.Sprintf(":%d", PosDefaultStmt)
   158  	is := fmt.Sprintf(":%d", PosIsStmt)
   159  	not := fmt.Sprintf(":%d", PosNotStmt)
   160  
   161  	for _, test := range []struct {
   162  		x         lico
   163  		string    string
   164  		line, col uint
   165  	}{
   166  		{0, ":0" + not, 0, 0},
   167  		{makeLico(0, 0), ":0" + not, 0, 0},
   168  		{makeLico(0, 1), ":0:1" + def, 0, 1},
   169  		{makeLico(1, 0), ":1" + def, 1, 0},
   170  		{makeLico(1, 1), ":1:1" + def, 1, 1},
   171  		{makeLico(1, 1).withIsStmt(), ":1:1" + is, 1, 1},
   172  		{makeLico(1, 1).withNotStmt(), ":1:1" + not, 1, 1},
   173  		{makeLico(lineMax, 1), fmt.Sprintf(":%d:1", lineMax) + def, lineMax, 1},
   174  		{makeLico(lineMax+1, 1), fmt.Sprintf(":%d:1", lineMax) + def, lineMax, 1}, // line too large, stick with max. line
   175  		{makeLico(1, colMax), ":1" + def, 1, colMax},
   176  		{makeLico(1, colMax+1), ":1" + def, 1, 0}, // column too large
   177  		{makeLico(lineMax+1, colMax+1), fmt.Sprintf(":%d", lineMax) + def, lineMax, 0},
   178  		{makeLico(lineMax+1, colMax+1).withIsStmt(), fmt.Sprintf(":%d", lineMax) + is, lineMax, 0},
   179  		{makeLico(lineMax+1, colMax+1).withNotStmt(), fmt.Sprintf(":%d", lineMax) + not, lineMax, 0},
   180  	} {
   181  		x := test.x
   182  		if got := format("", x.Line(), x.Col(), true) + fmt.Sprintf(":%d", x.IsStmt()); got != test.string {
   183  			t.Errorf("%s: got %q", test.string, got)
   184  		}
   185  	}
   186  }
   187  
   188  func TestLogue(t *testing.T) {
   189  	defp := fmt.Sprintf(":%d", PosDefaultLogue)
   190  	pro := fmt.Sprintf(":%d", PosPrologueEnd)
   191  	epi := fmt.Sprintf(":%d", PosEpilogueBegin)
   192  
   193  	defs := fmt.Sprintf(":%d", PosDefaultStmt)
   194  	not := fmt.Sprintf(":%d", PosNotStmt)
   195  
   196  	for i, test := range []struct {
   197  		x         lico
   198  		string    string
   199  		line, col uint
   200  	}{
   201  		{makeLico(0, 0).withXlogue(PosDefaultLogue), ":0" + not + defp, 0, 0},
   202  		{makeLico(0, 0).withXlogue(PosPrologueEnd), ":0" + not + pro, 0, 0},
   203  		{makeLico(0, 0).withXlogue(PosEpilogueBegin), ":0" + not + epi, 0, 0},
   204  
   205  		{makeLico(0, 1).withXlogue(PosDefaultLogue), ":0:1" + defs + defp, 0, 1},
   206  		{makeLico(0, 1).withXlogue(PosPrologueEnd), ":0:1" + defs + pro, 0, 1},
   207  		{makeLico(0, 1).withXlogue(PosEpilogueBegin), ":0:1" + defs + epi, 0, 1},
   208  
   209  		{makeLico(1, 0).withXlogue(PosDefaultLogue), ":1" + defs + defp, 1, 0},
   210  		{makeLico(1, 0).withXlogue(PosPrologueEnd), ":1" + defs + pro, 1, 0},
   211  		{makeLico(1, 0).withXlogue(PosEpilogueBegin), ":1" + defs + epi, 1, 0},
   212  
   213  		{makeLico(1, 1).withXlogue(PosDefaultLogue), ":1:1" + defs + defp, 1, 1},
   214  		{makeLico(1, 1).withXlogue(PosPrologueEnd), ":1:1" + defs + pro, 1, 1},
   215  		{makeLico(1, 1).withXlogue(PosEpilogueBegin), ":1:1" + defs + epi, 1, 1},
   216  
   217  		{makeLico(lineMax, 1).withXlogue(PosDefaultLogue), fmt.Sprintf(":%d:1", lineMax) + defs + defp, lineMax, 1},
   218  		{makeLico(lineMax, 1).withXlogue(PosPrologueEnd), fmt.Sprintf(":%d:1", lineMax) + defs + pro, lineMax, 1},
   219  		{makeLico(lineMax, 1).withXlogue(PosEpilogueBegin), fmt.Sprintf(":%d:1", lineMax) + defs + epi, lineMax, 1},
   220  	} {
   221  		x := test.x
   222  		if got := format("", x.Line(), x.Col(), true) + fmt.Sprintf(":%d:%d", x.IsStmt(), x.Xlogue()); got != test.string {
   223  			t.Errorf("%d: %s: got %q", i, test.string, got)
   224  		}
   225  	}
   226  }
   227  

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