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.
4
5// This file contains test cases for short valid and invalid programs.
6
7package parser
8
9import "testing"
10
11var valids = []string{
12	"package p\n",
13	`package p;`,
14	`package p; import "fmt"; func f() { fmt.Println("Hello, World!") };`,
15	`package p; func f() { if f(T{}) {} };`,
16	`package p; func f() { _ = <-chan int(nil) };`,
17	`package p; func f() { _ = (<-chan int)(nil) };`,
18	`package p; func f() { _ = (<-chan <-chan int)(nil) };`,
19	`package p; func f() { _ = <-chan <-chan <-chan <-chan <-int(nil) };`,
20	`package p; func f(func() func() func());`,
21	`package p; func f(...T);`,
22	`package p; func f(float, ...int);`,
23	`package p; func f(x int, a ...int) { f(0, a...); f(1, a...,) };`,
24	`package p; func f(int,) {};`,
25	`package p; func f(...int,) {};`,
26	`package p; func f(x ...int,) {};`,
27	`package p; type T []int; var a []bool; func f() { if a[T{42}[0]] {} };`,
28	`package p; type T []int; func g(int) bool { return true }; func f() { if g(T{42}[0]) {} };`,
29	`package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`,
30	`package p; var a = T{{1, 2}, {3, 4}}`,
31	`package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`,
32	`package p; func f() { select { case x := (<-c): } };`,
33	`package p; func f() { if ; true {} };`,
34	`package p; func f() { switch ; {} };`,
35	`package p; func f() { for _ = range "foo" + "bar" {} };`,
36}
37
38func TestValid(t *testing.T) {
39	for _, src := range valids {
40		checkErrors(t, src, src)
41	}
42}
43
44var invalids = []string{
45	`foo /* ERROR "expected 'package'" */ !`,
46	`package p; func f() { if { /* ERROR "expected operand" */ } };`,
47	`package p; func f() { if ; { /* ERROR "expected operand" */ } };`,
48	`package p; func f() { if f(); { /* ERROR "expected operand" */ } };`,
49	`package p; const c; /* ERROR "expected '='" */`,
50	`package p; func f() { if _ /* ERROR "expected condition" */ = range x; true {} };`,
51	`package p; func f() { switch _ /* ERROR "expected condition" */ = range x; true {} };`,
52	`package p; func f() { for _ = range x ; /* ERROR "expected '{'" */ ; {} };`,
53	`package p; func f() { for ; ; _ = range /* ERROR "expected operand" */ x {} };`,
54	`package p; func f() { for ; _ /* ERROR "expected condition" */ = range x ; {} };`,
55	`package p; func f() { switch t /* ERROR "expected condition" */ = t.(type) {} };`,
56	`package p; func f() { switch t /* ERROR "expected condition" */ , t = t.(type) {} };`,
57	`package p; func f() { switch t /* ERROR "expected condition" */ = t.(type), t {} };`,
58	`package p; var a = [ /* ERROR "expected expression" */ 1]int;`,
59	`package p; var a = [ /* ERROR "expected expression" */ ...]int;`,
60	`package p; var a = struct /* ERROR "expected expression" */ {}`,
61	`package p; var a = func /* ERROR "expected expression" */ ();`,
62	`package p; var a = interface /* ERROR "expected expression" */ {}`,
63	`package p; var a = [ /* ERROR "expected expression" */ ]int`,
64	`package p; var a = map /* ERROR "expected expression" */ [int]int`,
65	`package p; var a = chan /* ERROR "expected expression" */ int;`,
66	`package p; var a = []int{[ /* ERROR "expected expression" */ ]int};`,
67	`package p; var a = ( /* ERROR "expected expression" */ []int);`,
68	`package p; var a = a[[ /* ERROR "expected expression" */ ]int:[]int];`,
69	`package p; var a = <- /* ERROR "expected expression" */ chan int;`,
70	`package p; func f() { select { case _ <- chan /* ERROR "expected expression" */ int: } };`,
71	`package p; func f() { _ = (<-<- /* ERROR "expected 'chan'" */ chan int)(nil) };`,
72	`package p; func f() { _ = (<-chan<-chan<-chan<-chan<-chan<- /* ERROR "expected channel type" */ int)(nil) };`,
73	`package p; func f() { var t []int; t /* ERROR "expected identifier on left side of :=" */ [0] := 0 };`,
74	`package p; func f() { if x := g(); x = /* ERROR "expected '=='" */ 0 {}};`,
75	`package p; func f() { _ = x = /* ERROR "expected '=='" */ 0 {}};`,
76	`package p; func f() { _ = 1 == func()int { var x bool; x = x = /* ERROR "expected '=='" */ true; return x }() };`,
77}
78
79func TestInvalid(t *testing.T) {
80	for _, src := range invalids {
81		checkErrors(t, src, src)
82	}
83}
84