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|
// Copyright 2013 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 doc_test
import (
"bytes"
"go/doc"
"go/format"
"go/parser"
"go/token"
"strings"
"testing"
)
const exampleTestFile = `
package foo_test
import (
"fmt"
"log"
"os/exec"
)
func ExampleHello() {
fmt.Println("Hello, world!")
// Output: Hello, world!
}
func ExampleImport() {
out, err := exec.Command("date").Output()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
`
var exampleTestCases = []struct {
Name, Play, Output string
}{
{
Name: "Hello",
Play: exampleHelloPlay,
Output: "Hello, world!\n",
},
{
Name: "Import",
Play: exampleImportPlay,
},
}
const exampleHelloPlay = `package main
import (
"fmt"
)
func main() {
fmt.Println("Hello, world!")
}
`
const exampleImportPlay = `package main
import (
"fmt"
"log"
"os/exec"
)
func main() {
out, err := exec.Command("date").Output()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
`
func TestExamples(t *testing.T) {
fs := token.NewFileSet()
file, err := parser.ParseFile(fs, "test.go", strings.NewReader(exampleTestFile), parser.ParseComments)
if err != nil {
t.Fatal(err)
}
for i, e := range doc.Examples(file) {
c := exampleTestCases[i]
if e.Name != c.Name {
t.Errorf("got Name == %q, want %q", e.Name, c.Name)
}
if w := c.Play; w != "" {
var g string // hah
if e.Play == nil {
g = "<nil>"
} else {
b := new(bytes.Buffer)
if err := format.Node(b, fs, e.Play); err != nil {
t.Fatal(err)
}
g = b.String()
}
if g != w {
t.Errorf("%s: got Play == %q, want %q", c.Name, g, w)
}
}
if g, w := e.Output, c.Output; g != w {
t.Errorf("%s: got Output == %q, want %q", c.Name, g, w)
}
}
}
|
