github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/context/withtimeout_test.go (about)

     1  // Copyright 2014 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  package context_test
     6  
     7  import (
     8  	"fmt"
     9  	"time"
    10  
    11  	"golang.org/x/net/context"
    12  )
    13  
    14  func ExampleWithTimeout() {
    15  	// Pass a context with a timeout to tell a blocking function that it
    16  	// should abandon its work after the timeout elapses.
    17  	ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond)
    18  	select {
    19  	case <-time.After(200 * time.Millisecond):
    20  		fmt.Println("overslept")
    21  	case <-ctx.Done():
    22  		fmt.Println(ctx.Err()) // prints "context deadline exceeded"
    23  	}
    24  	// Output:
    25  	// context deadline exceeded
    26  }