go/src/net/http/httptest/httptest.go

// NewRequest wraps NewRequestWithContext using context.Background.
func NewRequest(method, target string, body io.Reader) *http.Request { … }

// NewRequestWithContext returns a new incoming server Request, suitable
// for passing to an [http.Handler] for testing.
//
// The target is the RFC 7230 "request-target": it may be either a
// path or an absolute URL. If target is an absolute URL, the host name
// from the URL is used. Otherwise, "example.com" is used.
//
// The TLS field is set to a non-nil dummy value if target has scheme
// "https".
//
// The Request.Proto is always HTTP/1.1.
//
// An empty method means "GET".
//
// The provided body may be nil. If the body is of type *bytes.Reader,
// *strings.Reader, or *bytes.Buffer, the Request.ContentLength is
// set.
//
// NewRequest panics on error for ease of use in testing, where a
// panic is acceptable.
//
// To generate a client HTTP request instead of a server request, see
// the NewRequest function in the net/http package.
func NewRequestWithContext(ctx context.Context, method, target string, body io.Reader) *http.Request { … }