self_test.go

Documentation: go/types

     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  package types_test
     6  
     7  import (
     8  	"go/ast"
     9  	"go/importer"
    10  	"go/parser"
    11  	"go/token"
    12  	"path"
    13  	"path/filepath"
    14  	"testing"
    15  	"time"
    16  
    17  	. "go/types"
    18  )
    19  
    20  func TestSelf(t *testing.T) {
    21  	fset := token.NewFileSet()
    22  	files, err := pkgFiles(fset, ".", 0)
    23  	if err != nil {
    24  		t.Fatal(err)
    25  	}
    26  
    27  	conf := Config{Importer: importer.Default()}
    28  	_, err = conf.Check("go/types", fset, files, nil)
    29  	if err != nil {
    30  		// Importing go/constant doesn't work in the
    31  		// build dashboard environment. Don't report an error
    32  		// for now so that the build remains green.
    33  		// TODO(gri) fix this
    34  		t.Log(err) // replace w/ t.Fatal eventually
    35  		return
    36  	}
    37  }
    38  
    39  func BenchmarkCheck(b *testing.B) {
    40  	for _, p := range []string{
    41  		"net/http",
    42  		"go/parser",
    43  		"go/constant",
    44  		filepath.Join("go", "internal", "gcimporter"),
    45  	} {
    46  		b.Run(path.Base(p), func(b *testing.B) {
    47  			path := filepath.Join("..", "..", p)
    48  			for _, ignoreFuncBodies := range []bool{false, true} {
    49  				name := "funcbodies"
    50  				if ignoreFuncBodies {
    51  					name = "nofuncbodies"
    52  				}
    53  				b.Run(name, func(b *testing.B) {
    54  					b.Run("info", func(b *testing.B) {
    55  						runbench(b, path, ignoreFuncBodies, true)
    56  					})
    57  					b.Run("noinfo", func(b *testing.B) {
    58  						runbench(b, path, ignoreFuncBodies, false)
    59  					})
    60  				})
    61  			}
    62  		})
    63  	}
    64  }
    65  
    66  func runbench(b *testing.B, path string, ignoreFuncBodies, writeInfo bool) {
    67  	fset := token.NewFileSet()
    68  	files, err := pkgFiles(fset, path, 0)
    69  	if err != nil {
    70  		b.Fatal(err)
    71  	}
    72  	// determine line count
    73  	lines := 0
    74  	fset.Iterate(func(f *token.File) bool {
    75  		lines += f.LineCount()
    76  		return true
    77  	})
    78  
    79  	b.ResetTimer()
    80  	start := time.Now()
    81  	for i := 0; i < b.N; i++ {
    82  		conf := Config{
    83  			IgnoreFuncBodies: ignoreFuncBodies,
    84  			Importer:         importer.Default(),
    85  		}
    86  		var info *Info
    87  		if writeInfo {
    88  			info = &Info{
    89  				Types:      make(map[ast.Expr]TypeAndValue),
    90  				Defs:       make(map[*ast.Ident]Object),
    91  				Uses:       make(map[*ast.Ident]Object),
    92  				Implicits:  make(map[ast.Node]Object),
    93  				Selections: make(map[*ast.SelectorExpr]*Selection),
    94  				Scopes:     make(map[ast.Node]*Scope),
    95  			}
    96  		}
    97  		if _, err := conf.Check(path, fset, files, info); err != nil {
    98  			b.Fatal(err)
    99  		}
   100  	}
   101  	b.StopTimer()
   102  	b.ReportMetric(float64(lines)*float64(b.N)/time.Since(start).Seconds(), "lines/s")
   103  }
   104  
   105  func pkgFiles(fset *token.FileSet, path string, mode parser.Mode) ([]*ast.File, error) {
   106  	filenames, err := pkgFilenames(path) // from stdlib_test.go
   107  	if err != nil {
   108  		return nil, err
   109  	}
   110  
   111  	var files []*ast.File
   112  	for _, filename := range filenames {
   113  		file, err := parser.ParseFile(fset, filename, nil, mode)
   114  		if err != nil {
   115  			return nil, err
   116  		}
   117  		files = append(files, file)
   118  	}
   119  
   120  	return files, nil
   121  }
   122
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