go/doc/progs/interface.go
Josh Bleecher Snyder 5451fff475 doc/progs: rewrite test driver in Go
The tests in doc/progs appear to have been originally written
for use with the old test driver. At some later point,
they acquired their own test driver.
Both ran tests in serial.

This CL rewrites the current test driver in Go,
runs tests concurrently, and cleans up
historical artifacts from the old drivers.

The primary motivation is to speed up all.bash.
On my laptop, using tip, this CL reduces doc/progs test
wall time from 26s to 7s. The savings will remain
even when the compiler gets faster. Using Go 1.4,
this CL reduces test wall time from 15s to 4s.

Change-Id: Iae945a8490222beee76e8a2118a0d7956092f543
Reviewed-on: https://go-review.googlesource.com/8410
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-07 00:41:59 +00:00

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Go

// Copyright 2012 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 the code snippets included in "The Laws of Reflection."
package main
import (
"bufio"
"bytes"
"io"
"os"
)
type MyInt int
var i int
var j MyInt
// STOP OMIT
// Reader is the interface that wraps the basic Read method.
type Reader interface {
Read(p []byte) (n int, err error)
}
// Writer is the interface that wraps the basic Write method.
type Writer interface {
Write(p []byte) (n int, err error)
}
// STOP OMIT
func readers() { // OMIT
var r io.Reader
r = os.Stdin
r = bufio.NewReader(r)
r = new(bytes.Buffer)
// and so on
// STOP OMIT
}
func typeAssertions() (interface{}, error) { // OMIT
var r io.Reader
tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
if err != nil {
return nil, err
}
r = tty
// STOP OMIT
var w io.Writer
w = r.(io.Writer)
// STOP OMIT
var empty interface{}
empty = w
// STOP OMIT
return empty, err
}
func main() {
}