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schemes_test.go
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schemes_test.go
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// Copyright 2017-2018 the u-root 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 pxe
import (
"errors"
"fmt"
"io"
"io/ioutil"
"net/url"
"path"
"reflect"
"strings"
"testing"
"github.com/u-root/u-root/pkg/uio"
)
type MockScheme struct {
// scheme is the scheme name.
scheme string
// hosts is a map of host -> relative filename to host -> file contents.
hosts map[string]map[string]string
// numCalled is a map of URL string -> number of times GetFile has been
// called on that URL.
numCalled map[string]uint
}
func NewMockScheme(scheme string) *MockScheme {
return &MockScheme{
scheme: scheme,
hosts: make(map[string]map[string]string),
numCalled: make(map[string]uint),
}
}
func (m *MockScheme) Add(host string, p string, content string) {
_, ok := m.hosts[host]
if !ok {
m.hosts[host] = make(map[string]string)
}
m.hosts[host][path.Clean(p)] = content
}
func (m *MockScheme) NumCalled(u *url.URL) uint {
url := u.String()
if c, ok := m.numCalled[url]; ok {
return c
}
return 0
}
var (
errWrongScheme = errors.New("wrong scheme")
errNoSuchHost = errors.New("no such host exists")
errNoSuchFile = errors.New("no such file exists on this host")
)
func (m *MockScheme) GetFile(u *url.URL) (io.ReaderAt, error) {
url := u.String()
if _, ok := m.numCalled[url]; ok {
m.numCalled[url]++
} else {
m.numCalled[url] = 1
}
if u.Scheme != m.scheme {
return nil, errWrongScheme
}
files, ok := m.hosts[u.Host]
if !ok {
return nil, errNoSuchHost
}
content, ok := files[path.Clean(u.Path)]
if !ok {
return nil, errNoSuchFile
}
return strings.NewReader(content), nil
}
func TestGetFile(t *testing.T) {
for i, tt := range []struct {
scheme func() *MockScheme
url *url.URL
err error
want string
}{
{
scheme: func() *MockScheme {
s := NewMockScheme("fooftp")
s.Add("192.168.0.1", "/foo/pxelinux.cfg/default", "haha")
return s
},
want: "haha",
url: &url.URL{
Scheme: "fooftp",
Host: "192.168.0.1",
Path: "/foo/pxelinux.cfg/default",
},
},
{
scheme: func() *MockScheme {
s := NewMockScheme("fooftp")
return s
},
url: &url.URL{
Scheme: "nosuch",
},
err: ErrNoSuchScheme,
},
{
scheme: func() *MockScheme {
s := NewMockScheme("fooftp")
return s
},
url: &url.URL{
Scheme: "fooftp",
Host: "someotherplace",
},
err: errNoSuchHost,
},
{
scheme: func() *MockScheme {
s := NewMockScheme("fooftp")
s.Add("somehost", "somefile", "somecontent")
return s
},
url: &url.URL{
Scheme: "fooftp",
Host: "somehost",
Path: "/someotherfile",
},
err: errNoSuchFile,
},
} {
t.Run(fmt.Sprintf("Test #%02d", i), func(t *testing.T) {
fs := tt.scheme()
s := make(Schemes)
s.Register(fs.scheme, fs)
// Test both GetFile and LazyGetFile.
for _, f := range []func(url *url.URL) (io.ReaderAt, error){
s.GetFile,
s.LazyGetFile,
} {
r, err := f(tt.url)
if uErr, ok := err.(*URLError); ok && uErr.Err != tt.err {
t.Errorf("GetFile() = %v, want %v", uErr.Err, tt.err)
} else if !ok && err != tt.err {
t.Errorf("GetFile() = %v, want %v", err, tt.err)
}
if err != nil {
return
}
content, err := ioutil.ReadAll(uio.Reader(r))
if err != nil {
t.Errorf("bytes.Buffer read returned an error? %v", err)
}
if got, want := string(content), tt.want; got != want {
t.Errorf("GetFile() = %v, want %v", got, want)
}
}
})
}
}
func TestParseURL(t *testing.T) {
for i, tt := range []struct {
url string
wd *url.URL
err bool
want *url.URL
}{
{
url: "default",
wd: &url.URL{
Scheme: "tftp",
Host: "192.168.1.1",
Path: "/foobar/pxelinux.cfg",
},
want: &url.URL{
Scheme: "tftp",
Host: "192.168.1.1",
Path: "/foobar/pxelinux.cfg/default",
},
},
{
url: "http://192.168.2.1/configs/your-machine.cfg",
wd: &url.URL{
Scheme: "tftp",
Host: "192.168.1.1",
Path: "/foobar/pxelinux.cfg",
},
want: &url.URL{
Scheme: "http",
Host: "192.168.2.1",
Path: "/configs/your-machine.cfg",
},
},
} {
t.Run(fmt.Sprintf("Test #%02d", i), func(t *testing.T) {
got, err := parseURL(tt.url, tt.wd)
if (err != nil) != tt.err {
t.Errorf("Wanted error (%v), but got %v", tt.err, err)
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("parseURL() = %#v, want %#v", got, tt.want)
}
})
}
}