// Renders the example content including support for context sensitive
// text substitution.
func (c *exampleContent) Write(w io.Writer) (int, error) {
e := c.Example
wwwURL := fburl.URL{
Env: c.Context.Env,
}
tpl, err := template.New("example-" + e.URL).Parse(string(e.Content))
if err != nil {
// if template parsing fails, we ignore it. it's probably malformed html
return w.Write(e.Content)
}
countingW := counting.NewWriter(w)
err = tpl.Execute(countingW,
struct {
Rand string // a random token
RellFBNS string // the OG namespace
RellURL string // local http://www.fbrell.com/ URL
WwwURL string // server specific http://www.facebook.com/ URL
}{
Rand: randString(10),
RellFBNS: c.Context.AppNamespace(),
RellURL: context.Default().AbsoluteURL("/").String(),
WwwURL: wwwURL.String(),
})
if err != nil {
// if template execution fails, we ignore it. it's probably malformed html
return w.Write(e.Content)
}
return countingW.Count(), err
}
func TestParseBase64(t *testing.T) {
t.Parallel()
const song1 = "W1sib2c6dGl0bGUiLCJzb25nMSJdLFsib2c6dHlwZSIsInNvbmciXV0"
expected := &Object{Pairs: []Pair{
{"og:title", "song1"},
{"og:type", "song"},
{"og:url", "http://www.fbrell.com/rog/" + song1},
{"og:image", "http://www.fbrell.com/public/images/" + stockImages[8]},
{"og:description", stockDescriptions[0]},
}}
object, err := NewFromBase64(context.Default(), song1)
if err != nil {
t.Fatal(err)
}
assertSubset(t, expected, object)
}
func TestParseValues(t *testing.T) {
t.Parallel()
const ogType = "article"
const ogTitle = "foo"
values := url.Values{}
values.Set("og:type", ogType)
values.Set("og:title", ogTitle)
expected := &Object{Pairs: []Pair{
{"og:type", ogType},
{"og:title", ogTitle},
{"og:url", "http://www.fbrell.com/og/" + ogType + "/" + ogTitle},
{"og:image", "http://www.fbrell.com/public/images/" + stockImages[8]},
{"og:description", stockDescriptions[6]},
}}
object, err := NewFromValues(context.Default(), values)
if err != nil {
t.Fatal(err)
}
assertSubset(t, expected, object)
}
func TestDefaultContext(t *testing.T) {
t.Parallel()
ctx := fromValues(t, url.Values{})
subset.Assert(t, context.Default(), ctx)
}