go/format: move example to external test file

Per #11257 all examples should be in external test files.

Additionally, doing so makes this example playable.

Updates #24352. (Albeit tangentially).

Change-Id: I77ab4655107f61db2e9d21a608b73ace3a230fb2
Reviewed-on: https://go-review.googlesource.com/101285
Reviewed-by: Robert Griesemer <gri@golang.org>

diff --git a/src/go/format/example_test.go b/src/go/format/example_test.go
new file mode 100644 (file)
index 0000000..5b6789a
--- /dev/null
+++ b/src/go/format/example_test.go
@@ -0,0 +1,39 @@
+// Copyright 2018 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 format_test
+
+import (
+       "bytes"
+       "fmt"
+       "go/format"
+       "go/parser"
+       "go/token"
+       "log"
+)
+
+func ExampleNode() {
+       const expr = "(6+2*3)/4"
+
+       // parser.ParseExpr parses the argument and returns the
+       // corresponding ast.Node.
+       node, err := parser.ParseExpr(expr)
+       if err != nil {
+               log.Fatal(err)
+       }
+
+       // Create a FileSet for node. Since the node does not come
+       // from a real source file, fset will be empty.
+       fset := token.NewFileSet()
+
+       var buf bytes.Buffer
+       err = format.Node(&buf, fset, node)
+       if err != nil {
+               log.Fatal(err)
+       }
+
+       fmt.Println(buf.String())
+
+       // Output: (6 + 2*3) / 4
+}

diff --git a/src/go/format/format_test.go b/src/go/format/format_test.go
index 72b8d5aeeb583c3d2a06f15f38d3ebff09bd897d..b5817a5dd183ab4b79191f6aca4ab38f27ddf3f1 100644 (file)
--- a/src/go/format/format_test.go
+++ b/src/go/format/format_test.go
@@ -6,11 +6,9 @@ package format
 
 import (
        "bytes"
-       "fmt"
        "go/parser"
        "go/token"
        "io/ioutil"
-       "log"
        "strings"
        "testing"
 )
@@ -145,28 +143,3 @@ func TestPartial(t *testing.T) {
                }
        }
 }
-
-func ExampleNode() {
-       const expr = "(6+2*3)/4"
-
-       // parser.ParseExpr parses the argument and returns the
-       // corresponding ast.Node.
-       node, err := parser.ParseExpr(expr)
-       if err != nil {
-               log.Fatal(err)
-       }
-
-       // Create a FileSet for node. Since the node does not come
-       // from a real source file, fset will be empty.
-       fset := token.NewFileSet()
-
-       var buf bytes.Buffer
-       err = Node(&buf, fset, node)
-       if err != nil {
-               log.Fatal(err)
-       }
-
-       fmt.Println(buf.String())
-
-       // Output: (6 + 2*3) / 4
-}