parser_test.go

Documentation: golang.org/x/tools/go/internal/gccgoimporter

     1  // Copyright 2013 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  // Except for this comment, this file is a verbatim copy of the file
     6  // with the same name in $GOROOT/src/go/internal/gccgoimporter.
     7  
     8  package gccgoimporter
     9  
    10  import (
    11  	"bytes"
    12  	"go/types"
    13  	"strings"
    14  	"testing"
    15  	"text/scanner"
    16  )
    17  
    18  var typeParserTests = []struct {
    19  	id, typ, want, underlying, methods string
    20  }{
    21  	{id: "foo", typ: "<type -1>", want: "int8"},
    22  	{id: "foo", typ: "<type 1 *<type -19>>", want: "*error"},
    23  	{id: "foo", typ: "<type 1 *any>", want: "unsafe.Pointer"},
    24  	{id: "foo", typ: "<type 1 \"Bar\" <type 2 *<type 1>>>", want: "foo.Bar", underlying: "*foo.Bar"},
    25  	{id: "foo", typ: "<type 1 \"bar.Foo\" \"bar\" <type -1>\nfunc (? <type 1>) M ();\n>", want: "bar.Foo", underlying: "int8", methods: "func (bar.Foo).M()"},
    26  	{id: "foo", typ: "<type 1 \".bar.foo\" \"bar\" <type -1>>", want: "bar.foo", underlying: "int8"},
    27  	{id: "foo", typ: "<type 1 []<type -1>>", want: "[]int8"},
    28  	{id: "foo", typ: "<type 1 [42]<type -1>>", want: "[42]int8"},
    29  	{id: "foo", typ: "<type 1 map [<type -1>] <type -2>>", want: "map[int8]int16"},
    30  	{id: "foo", typ: "<type 1 chan <type -1>>", want: "chan int8"},
    31  	{id: "foo", typ: "<type 1 chan <- <type -1>>", want: "<-chan int8"},
    32  	{id: "foo", typ: "<type 1 chan -< <type -1>>", want: "chan<- int8"},
    33  	{id: "foo", typ: "<type 1 struct { I8 <type -1>; I16 <type -2> \"i16\"; }>", want: "struct{I8 int8; I16 int16 \"i16\"}"},
    34  	{id: "foo", typ: "<type 1 interface { Foo (a <type -1>, b <type -2>) <type -1>; Bar (? <type -2>, ? ...<type -1>) (? <type -2>, ? <type -1>); Baz (); }>", want: "interface{Bar(int16, ...int8) (int16, int8); Baz(); Foo(a int8, b int16) int8}"},
    35  	{id: "foo", typ: "<type 1 (? <type -1>) <type -2>>", want: "func(int8) int16"},
    36  }
    37  
    38  func TestTypeParser(t *testing.T) {
    39  	for _, test := range typeParserTests {
    40  		var p parser
    41  		p.init("test.gox", strings.NewReader(test.typ), make(map[string]*types.Package))
    42  		p.version = "v2"
    43  		p.pkgname = test.id
    44  		p.pkgpath = test.id
    45  		p.maybeCreatePackage()
    46  		typ := p.parseType(p.pkg)
    47  
    48  		if p.tok != scanner.EOF {
    49  			t.Errorf("expected full parse, stopped at %q", p.lit)
    50  		}
    51  
    52  		// interfaces must be explicitly completed
    53  		if ityp, _ := typ.(*types.Interface); ityp != nil {
    54  			ityp.Complete()
    55  		}
    56  
    57  		got := typ.String()
    58  		if got != test.want {
    59  			t.Errorf("got type %q, expected %q", got, test.want)
    60  		}
    61  
    62  		if test.underlying != "" {
    63  			underlying := typ.Underlying().String()
    64  			if underlying != test.underlying {
    65  				t.Errorf("got underlying type %q, expected %q", underlying, test.underlying)
    66  			}
    67  		}
    68  
    69  		if test.methods != "" {
    70  			nt := typ.(*types.Named)
    71  			var buf bytes.Buffer
    72  			for i := 0; i != nt.NumMethods(); i++ {
    73  				buf.WriteString(nt.Method(i).String())
    74  			}
    75  			methods := buf.String()
    76  			if methods != test.methods {
    77  				t.Errorf("got methods %q, expected %q", methods, test.methods)
    78  			}
    79  		}
    80  	}
    81  }
    82
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