1 // Copyright 2009 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.
13 var fset = token.NewFileSet()
15 var illegalInputs = []interface{}{
20 `package p; func f() { if /* should have condition */ {} };`,
21 `package p; func f() { if ; /* should have condition */ {} };`,
22 `package p; func f() { if f(); /* should have condition */ {} };`,
23 `package p; const c; /* should have constant value */`,
24 `package p; func f() { if _ = range x; true {} };`,
25 `package p; func f() { switch _ = range x; true {} };`,
26 `package p; func f() { for _ = range x ; ; {} };`,
27 `package p; func f() { for ; ; _ = range x {} };`,
28 `package p; func f() { for ; _ = range x ; {} };`,
29 `package p; var a = [1]int; /* illegal expression */`,
30 `package p; var a = [...]int; /* illegal expression */`,
31 `package p; var a = struct{} /* illegal expression */`,
32 `package p; var a = func(); /* illegal expression */`,
33 `package p; var a = interface{} /* illegal expression */`,
34 `package p; var a = []int /* illegal expression */`,
35 `package p; var a = map[int]int /* illegal expression */`,
36 `package p; var a = chan int; /* illegal expression */`,
37 `package p; var a = []int{[]int}; /* illegal expression */`,
38 `package p; var a = ([]int); /* illegal expression */`,
39 `package p; var a = a[[]int:[]int]; /* illegal expression */`,
40 `package p; var a = <- chan int; /* illegal expression */`,
41 `package p; func f() { select { case _ <- chan int: } };`,
44 func TestParseIllegalInputs(t *testing.T) {
45 for _, src := range illegalInputs {
46 _, err := ParseFile(fset, "", src, 0)
48 t.Errorf("ParseFile(%v) should have failed", src)
53 var validPrograms = []interface{}{
56 `package p; import "fmt"; func f() { fmt.Println("Hello, World!") };`,
57 `package p; func f() { if f(T{}) {} };`,
58 `package p; func f() { _ = (<-chan int)(x) };`,
59 `package p; func f() { _ = (<-chan <-chan int)(x) };`,
60 `package p; func f(func() func() func());`,
61 `package p; func f(...T);`,
62 `package p; func f(float, ...int);`,
63 `package p; func f(x int, a ...int) { f(0, a...); f(1, a...,) };`,
64 `package p; type T []int; var a []bool; func f() { if a[T{42}[0]] {} };`,
65 `package p; type T []int; func g(int) bool { return true }; func f() { if g(T{42}[0]) {} };`,
66 `package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`,
67 `package p; var a = T{{1, 2}, {3, 4}}`,
68 `package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`,
69 `package p; func f() { select { case x := (<-c): } };`,
70 `package p; func f() { if ; true {} };`,
71 `package p; func f() { switch ; {} };`,
72 `package p; func f() { for _ = range "foo" + "bar" {} };`,
75 func TestParseValidPrograms(t *testing.T) {
76 for _, src := range validPrograms {
77 _, err := ParseFile(fset, "", src, 0)
79 t.Errorf("ParseFile(%q): %v", src, err)
84 var validFiles = []string{
89 func TestParse3(t *testing.T) {
90 for _, filename := range validFiles {
91 _, err := ParseFile(fset, filename, nil, DeclarationErrors)
93 t.Errorf("ParseFile(%s): %v", filename, err)
98 func nameFilter(filename string) bool {
102 case "parser_test.go":
109 func dirFilter(f *os.FileInfo) bool { return nameFilter(f.Name) }
111 func TestParse4(t *testing.T) {
113 pkgs, err := ParseDir(fset, path, dirFilter, 0)
115 t.Fatalf("ParseDir(%s): %v", path, err)
118 t.Errorf("incorrect number of packages: %d", len(pkgs))
120 pkg := pkgs["parser"]
122 t.Errorf(`package "parser" not found`)
125 for filename := range pkg.Files {
126 if !nameFilter(filename) {
127 t.Errorf("unexpected package file: %s", filename)