// The generalized form of ExpectThat. depth is the distance on the stack
// between the caller's frame and the user's frame. Returns passed iff the
// match succeeded.
func expectThat(
x interface{},
m oglematchers.Matcher,
depth int,
errorParts []interface{}) (passed bool) {
// Check whether the value matches. If it does, we are finished.
matcherErr := m.Matches(x)
if matcherErr == nil {
passed = true
return
}
var r FailureRecord
// Get information about the call site.
var ok bool
if _, r.FileName, r.LineNumber, ok = runtime.Caller(depth + 1); !ok {
panic("expectThat: runtime.Caller")
}
r.FileName = path.Base(r.FileName)
// Create an appropriate failure message. Make sure that the expected and
// actual values align properly.
relativeClause := ""
if matcherErr.Error() != "" {
relativeClause = fmt.Sprintf(", %s", matcherErr.Error())
}
r.Error = fmt.Sprintf(
"Expected: %s\nActual: %v%s",
m.Description(),
x,
relativeClause)
// Add the user error, if any.
if len(errorParts) != 0 {
v := reflect.ValueOf(errorParts[0])
if v.Kind() != reflect.String {
panic(fmt.Sprintf("ExpectThat: invalid format string type %v", v.Kind()))
}
r.Error = fmt.Sprintf(
"%s\n%s",
r.Error,
fmt.Sprintf(v.String(), errorParts[1:]...))
}
// Report the failure.
AddFailureRecord(r)
return
}
func matches(matcher ogle.Matcher, o interface{}) bool {
err := matcher.Matches(o)
return err == nil
}