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// Copyright 2016 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.
package syntax
import (
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"testing"
)
func TestPrint(t *testing.T) {
if testing.Short() {
t.Skip("skipping test in short mode")
}
// provide a no-op error handler so parsing doesn't stop after first error
ast, err := ParseFile(*src_, func(error) {}, nil, 0)
if err != nil {
t.Error(err)
}
if ast != nil {
Fprint(testOut(), ast, LineForm)
fmt.Println()
}
}
type shortBuffer struct {
buf []byte
}
func (w *shortBuffer) Write(data []byte) (n int, err error) {
w.buf = append(w.buf, data...)
n = len(data)
if len(w.buf) > 10 {
err = io.ErrShortBuffer
}
return
}
func TestPrintError(t *testing.T) {
const src = "package p; var x int"
ast, err := Parse(nil, strings.NewReader(src), nil, nil, 0)
if err != nil {
t.Fatal(err)
}
var buf shortBuffer
_, err = Fprint(&buf, ast, 0)
if err == nil || err != io.ErrShortBuffer {
t.Errorf("got err = %s, want %s", err, io.ErrShortBuffer)
}
}
var stringTests = []string{
"package p",
"package p; type _ int; type T1 = struct{}; type ( _ *struct{}; T2 = float32 )",
// channels
"package p; type _ chan chan int",
"package p; type _ chan (<-chan int)",
"package p; type _ chan chan<- int",
"package p; type _ <-chan chan int",
"package p; type _ <-chan <-chan int",
"package p; type _ <-chan chan<- int",
"package p; type _ chan<- chan int",
"package p; type _ chan<- <-chan int",
"package p; type _ chan<- chan<- int",
// TODO(gri) expand
}
func TestPrintString(t *testing.T) {
for _, want := range stringTests {
ast, err := Parse(nil, strings.NewReader(want), nil, nil, 0)
if err != nil {
t.Error(err)
continue
}
if got := String(ast); got != want {
t.Errorf("%q: got %q", want, got)
}
}
}
func testOut() io.Writer {
if testing.Verbose() {
return os.Stdout
}
return ioutil.Discard
}
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