Documentation ¶
Overview ¶
Package ghttp supports testing HTTP clients by providing a test server (simply a thin wrapper around httptest's server) that supports registering multiple handlers. Incoming requests are not routed between the different handlers - rather it is merely the order of the handlers that matters. The first request is handled by the first registered handler, the second request by the second handler, etc.
The intent here is to have each handler *verify* that the incoming request is valid. To accomplish, ghttp also provides a collection of bite-size handlers that each perform one aspect of request verification. These can be composed together and registered with a ghttp server. The result is an expressive language for describing the requests generated by the client under test.
Here's a simple example, note that the server handler is only defined in one BeforeEach and then modified, as required, by the nested BeforeEaches. A more comprehensive example is available at https://onsi.github.io/gomega/#_testing_http_clients
var _ = Describe("A Sprockets Client", func() { var server *ghttp.Server var client *SprocketClient BeforeEach(func() { server = ghttp.NewServer() client = NewSprocketClient(server.URL(), "skywalker", "tk427") }) AfterEach(func() { server.Close() }) Describe("fetching sprockets", func() { var statusCode int var sprockets []Sprocket BeforeEach(func() { statusCode = http.StatusOK sprockets = []Sprocket{} server.AppendHandlers(ghttp.CombineHandlers( ghttp.VerifyRequest("GET", "/sprockets"), ghttp.VerifyBasicAuth("skywalker", "tk427"), ghttp.RespondWithJSONEncodedPtr(&statusCode, &sprockets), )) }) Context("when requesting all sprockets", func() { Context("when the response is succesful", func() { BeforeEach(func() { sprockets = []Sprocket{ NewSprocket("Alfalfa"), NewSprocket("Banana"), } }) It("should return the returned sprockets", func() { Ω(client.Sprockets()).Should(Equal(sprockets)) }) }) Context("when the response is missing", func() { BeforeEach(func() { statusCode = http.StatusNotFound }) It("should return an empty list of sprockets", func() { Ω(client.Sprockets()).Should(BeEmpty()) }) }) Context("when the response fails to authenticate", func() { BeforeEach(func() { statusCode = http.StatusUnauthorized }) It("should return an AuthenticationError error", func() { sprockets, err := client.Sprockets() Ω(sprockets).Should(BeEmpty()) Ω(err).Should(MatchError(AuthenticationError)) }) }) Context("when the response is a server failure", func() { BeforeEach(func() { statusCode = http.StatusInternalServerError }) It("should return an InternalError error", func() { sprockets, err := client.Sprockets() Ω(sprockets).Should(BeEmpty()) Ω(err).Should(MatchError(InternalError)) }) }) }) Context("when requesting some sprockets", func() { BeforeEach(func() { sprockets = []Sprocket{ NewSprocket("Alfalfa"), NewSprocket("Banana"), } server.WrapHandler(0, ghttp.VerifyRequest("GET", "/sprockets", "filter=FOOD")) }) It("should make the request with a filter", func() { Ω(client.Sprockets("food")).Should(Equal(sprockets)) }) }) }) })
Index ¶
- func CombineHandlers(handlers ...http.HandlerFunc) http.HandlerFunc
- func RespondWith(statusCode int, body interface{}, optionalHeader ...http.Header) http.HandlerFunc
- func RespondWithJSONEncoded(statusCode int, object interface{}, optionalHeader ...http.Header) http.HandlerFunc
- func RespondWithJSONEncodedPtr(statusCode *int, object interface{}, optionalHeader ...http.Header) http.HandlerFunc
- func RespondWithPtr(statusCode *int, body interface{}, optionalHeader ...http.Header) http.HandlerFunc
- func VerifyBasicAuth(username string, password string) http.HandlerFunc
- func VerifyBody(expectedBody []byte) http.HandlerFunc
- func VerifyContentType(contentType string) http.HandlerFunc
- func VerifyForm(values url.Values) http.HandlerFunc
- func VerifyFormKV(key string, values ...string) http.HandlerFunc
- func VerifyHeader(header http.Header) http.HandlerFunc
- func VerifyHeaderKV(key string, values ...string) http.HandlerFunc
- func VerifyJSON(expectedJSON string) http.HandlerFunc
- func VerifyJSONRepresenting(object interface{}) http.HandlerFunc
- func VerifyRequest(method string, path interface{}, rawQuery ...string) http.HandlerFunc
- type Server
- func (s *Server) Addr() string
- func (s *Server) AppendHandlers(handlers ...http.HandlerFunc)
- func (s *Server) Close()
- func (s *Server) CloseClientConnections()
- func (s *Server) GetHandler(index int) http.HandlerFunc
- func (s *Server) ReceivedRequests() []*http.Request
- func (s *Server) Reset()
- func (s *Server) RouteToHandler(method string, path interface{}, handler http.HandlerFunc)
- func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request)
- func (s *Server) SetHandler(index int, handler http.HandlerFunc)
- func (s *Server) Start()
- func (s *Server) URL() string
- func (s *Server) WrapHandler(index int, handler http.HandlerFunc)
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func CombineHandlers ¶
func CombineHandlers(handlers ...http.HandlerFunc) http.HandlerFunc
CombineHandler takes variadic list of handlers and produces one handler that calls each handler in order.
func RespondWith ¶
func RespondWith(statusCode int, body interface{}, optionalHeader ...http.Header) http.HandlerFunc
RespondWith returns a handler that responds to a request with the specified status code and body
Body may be a string or []byte
Also, RespondWith can be given an optional http.Header. The headers defined therein will be added to the response headers.
func RespondWithJSONEncoded ¶
func RespondWithJSONEncoded(statusCode int, object interface{}, optionalHeader ...http.Header) http.HandlerFunc
RespondWithJSONEncoded returns a handler that responds to a request with the specified status code and a body containing the JSON-encoding of the passed in object
Also, RespondWithJSONEncoded can be given an optional http.Header. The headers defined therein will be added to the response headers.
func RespondWithJSONEncodedPtr ¶
func RespondWithJSONEncodedPtr(statusCode *int, object interface{}, optionalHeader ...http.Header) http.HandlerFunc
RespondWithJSONEncodedPtr behaves like RespondWithJSONEncoded but takes a pointer to a status code and object.
This allows different tests to share the same setup but specify different status codes and JSON-encoded objects.
Also, RespondWithJSONEncodedPtr can be given an optional http.Header. The headers defined therein will be added to the response headers. Since the http.Header can be mutated after the fact you don't need to pass in a pointer.
func RespondWithPtr ¶
func RespondWithPtr(statusCode *int, body interface{}, optionalHeader ...http.Header) http.HandlerFunc
RespondWithPtr returns a handler that responds to a request with the specified status code and body
Unlike RespondWith, you pass RepondWithPtr a pointer to the status code and body allowing different tests to share the same setup but specify different status codes and bodies.
Also, RespondWithPtr can be given an optional http.Header. The headers defined therein will be added to the response headers. Since the http.Header can be mutated after the fact you don't need to pass in a pointer.
func VerifyBasicAuth ¶
func VerifyBasicAuth(username string, password string) http.HandlerFunc
VerifyBasicAuth returns a handler that verifies the request contains a BasicAuth Authorization header matching the passed in username and password
func VerifyBody ¶
func VerifyBody(expectedBody []byte) http.HandlerFunc
VerifyBody returns a handler that verifies that the body of the request matches the passed in byte array. It does this using Equal().
func VerifyContentType ¶
func VerifyContentType(contentType string) http.HandlerFunc
VerifyContentType returns a handler that verifies that a request has a Content-Type header set to the specified value
func VerifyForm ¶
func VerifyForm(values url.Values) http.HandlerFunc
VerifyForm returns a handler that verifies a request contains the specified form values.
The request must contain *all* of the specified values, but it is allowed to have additional form values beyond the passed in set.
func VerifyFormKV ¶
func VerifyFormKV(key string, values ...string) http.HandlerFunc
VerifyFormKV returns a handler that verifies a request contains a form key with the specified values.
It is a convenience wrapper around `VerifyForm` that lets you avoid having to create a `url.Values` object.
func VerifyHeader ¶
func VerifyHeader(header http.Header) http.HandlerFunc
VerifyHeader returns a handler that verifies the request contains the passed in headers. The passed in header keys are first canonicalized via http.CanonicalHeaderKey.
The request must contain *all* the passed in headers, but it is allowed to have additional headers beyond the passed in set.
func VerifyHeaderKV ¶
func VerifyHeaderKV(key string, values ...string) http.HandlerFunc
VerifyHeaderKV returns a handler that verifies the request contains a header matching the passed in key and values (recall that a `http.Header` is a mapping from string (key) to []string (values)) It is a convenience wrapper around `VerifyHeader` that allows you to avoid having to create an `http.Header` object.
func VerifyJSON ¶
func VerifyJSON(expectedJSON string) http.HandlerFunc
VerifyJSON returns a handler that verifies that the body of the request is a valid JSON representation matching the passed in JSON string. It does this using Gomega's MatchJSON method
VerifyJSON also verifies that the request's content type is application/json
func VerifyJSONRepresenting ¶
func VerifyJSONRepresenting(object interface{}) http.HandlerFunc
VerifyJSONRepresenting is similar to VerifyJSON. Instead of taking a JSON string, however, it takes an arbitrary JSON-encodable object and verifies that the requests's body is a JSON representation that matches the object
func VerifyRequest ¶
func VerifyRequest(method string, path interface{}, rawQuery ...string) http.HandlerFunc
VerifyRequest returns a handler that verifies that a request uses the specified method to connect to the specified path You may also pass in an optional rawQuery string which is tested against the request's `req.URL.RawQuery`
For path, you may pass in a string, in which case strict equality will be applied Alternatively you can pass in a matcher (ContainSubstring("/foo") and MatchRegexp("/foo/[a-f0-9]+") for example)
Types ¶
type Server ¶
type Server struct { //The underlying httptest server HTTPTestServer *httptest.Server //Defaults to false. If set to true, the Server will allow more requests than there are registered handlers. AllowUnhandledRequests bool //The status code returned when receiving an unhandled request. //Defaults to http.StatusInternalServerError. //Only applies if AllowUnhandledRequests is true UnhandledRequestStatusCode int //If provided, ghttp will log about each request received to the provided io.Writer //Defaults to nil //If you're using Ginkgo, set this to GinkgoWriter to get improved output during failures Writer io.Writer // contains filtered or unexported fields }
func NewServer ¶
func NewServer() *Server
NewServer returns a new `*ghttp.Server` that wraps an `httptest` server. The server is started automatically.
func NewTLSServer ¶
func NewTLSServer() *Server
NewTLSServer returns a new `*ghttp.Server` that wraps an `httptest` TLS server. The server is started automatically.
func NewUnstartedServer ¶
func NewUnstartedServer() *Server
NewUnstartedServer return a new, unstarted, `*ghttp.Server`. Useful for specifying a custom listener on `server.HTTPTestServer`.
func (*Server) AppendHandlers ¶
func (s *Server) AppendHandlers(handlers ...http.HandlerFunc)
AppendHandlers will appends http.HandlerFuncs to the server's list of registered handlers. The first incoming request is handled by the first handler, the second by the second, etc...
func (*Server) Close ¶
func (s *Server) Close()
Close() should be called at the end of each test. It spins down and cleans up the test server.
func (*Server) CloseClientConnections ¶
func (s *Server) CloseClientConnections()
func (*Server) GetHandler ¶
func (s *Server) GetHandler(index int) http.HandlerFunc
GetHandler returns the handler registered at the passed in index.
func (*Server) ReceivedRequests ¶
ReceivedRequests is an array containing all requests received by the server (both handled and unhandled requests)
func (*Server) RouteToHandler ¶
func (s *Server) RouteToHandler(method string, path interface{}, handler http.HandlerFunc)
RouteToHandler can be used to register handlers that will always handle requests that match the passed in method and path.
The path may be either a string object or a *regexp.Regexp.
func (*Server) ServeHTTP ¶
func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request)
ServeHTTP() makes Server an http.Handler When the server receives a request it handles the request in the following order:
- If the request matches a handler registered with RouteToHandler, that handler is called.
- Otherwise, if there are handlers registered via AppendHandlers, those handlers are called in order.
- If all registered handlers have been called then: a) If AllowUnhandledRequests is true, the request will be handled with response code of UnhandledRequestStatusCode b) If AllowUnhandledRequests is false, the request will not be handled and the current test will be marked as failed.
func (*Server) SetHandler ¶
func (s *Server) SetHandler(index int, handler http.HandlerFunc)
SetHandler overrides the registered handler at the passed in index with the passed in handler This is useful, for example, when a server has been set up in a shared context, but must be tweaked for a particular test.
func (*Server) Start ¶
func (s *Server) Start()
Start() starts an unstarted ghttp server. It is a catastrophic error to call Start more than once (thanks, httptest).
func (*Server) WrapHandler ¶
func (s *Server) WrapHandler(index int, handler http.HandlerFunc)
WrapHandler combines the passed in handler with the handler registered at the passed in index. This is useful, for example, when a server has been set up in a shared context but must be tweaked for a particular test.
If the currently registered handler is A, and the new passed in handler is B then WrapHandler will generate a new handler that first calls A, then calls B, and assign it to index