// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This file contains test cases for short valid and invalid programs.

package parser

import "testing"

var valids = []string{
	"package p\n",
	`package p;`,
	`package p; import "fmt"; func f() { fmt.Println("Hello, World!") };`,
	`package p; func f() { if f(T{}) {} };`,
	`package p; func f() { _ = (<-chan int)(x) };`,
	`package p; func f() { _ = (<-chan <-chan int)(x) };`,
	`package p; func f(func() func() func());`,
	`package p; func f(...T);`,
	`package p; func f(float, ...int);`,
	`package p; func f(x int, a ...int) { f(0, a...); f(1, a...,) };`,
	`package p; func f(int,) {};`,
	`package p; func f(...int,) {};`,
	`package p; func f(x ...int,) {};`,
	`package p; type T []int; var a []bool; func f() { if a[T{42}[0]] {} };`,
	`package p; type T []int; func g(int) bool { return true }; func f() { if g(T{42}[0]) {} };`,
	`package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`,
	`package p; var a = T{{1, 2}, {3, 4}}`,
	`package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`,
	`package p; func f() { select { case x := (<-c): } };`,
	`package p; func f() { if ; true {} };`,
	`package p; func f() { switch ; {} };`,
	`package p; func f() { for _ = range "foo" + "bar" {} };`,
}

func TestValid(t *testing.T) {
	for _, src := range valids {
		checkErrors(t, src, src)
	}
}

var invalids = []string{
	`foo /* ERROR "expected 'package'" */ !`,
	`package p; func f() { if { /* ERROR "expected operand" */ } };`,
	`package p; func f() { if ; { /* ERROR "expected operand" */ } };`,
	`package p; func f() { if f(); { /* ERROR "expected operand" */ } };`,
	`package p; const c; /* ERROR "expected '='" */`,
	`package p; func f() { if _ /* ERROR "expected condition" */ = range x; true {} };`,
	`package p; func f() { switch _ /* ERROR "expected condition" */ = range x; true {} };`,
	`package p; func f() { for _ = range x ; /* ERROR "expected '{'" */ ; {} };`,
	`package p; func f() { for ; ; _ = range /* ERROR "expected operand" */ x {} };`,
	`package p; func f() { for ; _ /* ERROR "expected condition" */ = range x ; {} };`,
	`package p; func f() { switch t /* ERROR "expected condition" */ = t.(type) {} };`,
	`package p; func f() { switch t /* ERROR "expected condition" */ , t = t.(type) {} };`,
	`package p; func f() { switch t /* ERROR "expected condition" */ = t.(type), t {} };`,
	`package p; var a = [ /* ERROR "expected expression" */ 1]int;`,
	`package p; var a = [ /* ERROR "expected expression" */ ...]int;`,
	`package p; var a = struct /* ERROR "expected expression" */ {}`,
	`package p; var a = func /* ERROR "expected expression" */ ();`,
	`package p; var a = interface /* ERROR "expected expression" */ {}`,
	`package p; var a = [ /* ERROR "expected expression" */ ]int`,
	`package p; var a = map /* ERROR "expected expression" */ [int]int`,
	`package p; var a = chan /* ERROR "expected expression" */ int;`,
	`package p; var a = []int{[ /* ERROR "expected expression" */ ]int};`,
	`package p; var a = ( /* ERROR "expected expression" */ []int);`,
	`package p; var a = a[[ /* ERROR "expected expression" */ ]int:[]int];`,
	`package p; var a = <-  /* ERROR "expected expression" */ chan int;`,
	`package p; func f() { select { case _ <- chan  /* ERROR "expected expression" */ int: } };`,
}

func TestInvalid(t *testing.T) {
	for _, src := range invalids {
		checkErrors(t, src, src)
	}
}