Improving testing docs

1 files changed, 0 insertions, 93 deletions

diff --git a/docs/backends/testing.rst b/docs/backends/testing.rst
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-Testing
-=======
-
-If you need a stub backend for use in tests instead of a "real" backend (you probably don't want to make HTTP calls during unit tests), you can use the ``SttpBackendStub`` class. It allows specifying how the backend should respond to requests matching given predicates.
-
-A backend stub can be created using an instance of a "real" backend, or by explicitly giving the response wrapper monad and supported streams type.
-
-For example::
-
-  implicit val testingBackend = SttpBackendStub(HttpURLConnectionBackend())
-    .whenRequestMatches(_.uri.path.startsWith(List("a", "b")))
-    .thenRespond("Hello there!")
-    .whenRequestMatches(_.method == Method.POST)
-    .thenRespondServerError()
-      
-  val response1 = sttp.get(uri"http://example.org/a/b/c").send()
-  // response1.body will be Right("Hello there")
-  
-  val response2 = sttp.post(uri"http://example.org/d/e").send()
-  // response2.code will be 500
-
-It is also possible to match request by partial function, returning a response. E.g.::
-
-  implicit val testingBackend = SttpBackendStub(HttpURLConnectionBackend())
-    .whenRequestMatchesPartial({
-      case r if r.uri.path.endsWith(List("partial10")) => Response(Right(10), 200, Nil, Nil)
-      case r if r.uri.path.endsWith(List("partialAda")) => Response(Right("Ada"), 200, Nil, Nil)
-    })
-
-  val response1 = sttp.get(uri"http://example.org/partial10").send()
-  // response1.body will be Right(10)
-
-  val response2 = sttp.post(uri"http://example.org/partialAda").send()
-  // response2.body will be Right("Ada")
-
-However, this approach has one caveat: the responses are not type-safe. That is, the backend cannot match on or verify that the type included in the response matches the response type requested.
-
-Simulating exceptions
----------------------
-
-If you want to simulate an exception being thrown by a backend, e.g. a socket timeout exception, you can do so by throwing the appropriate exception instead of the response, e.g.::
-
-  implicit val testingBackend = SttpBackendStub(HttpURLConnectionBackend())
-    .whenRequestMatches(_ => true)
-    .thenRespond(throw new TimeoutException())
-
-Adjusting the response body type
---------------------------------
-
-If the type of the response body returned by the stub's rules (as specified using the ``.when...`` methods) doesn't match what was specified in the request, the stub will attempt to convert the body to the desired type. This might be useful when:
-
-* testing code which maps a basic response body to a custom type, e.g. mapping a raw json string using a decoder to a domain type
-* reading a classpath resource (which results in an ``InputStream``) and requesting a response of e.g. type ``String``
-
-The following conversions are supported:
-
-* anything to ``()`` (unit), when the response is ignored
-* ``InputStream`` and ``Array[Byte]`` to ``String``
-* ``InputStream`` and ``String`` to ``Array[Byte]``
-* ``InputStream``, ``String`` and ``Array[Byte]`` to custom types through mapped response specifications
-
-For example::
-
-  implicit val testingBackend = SttpBackendStub(HttpURLConnectionBackend())
-    .whenRequestMatches(_ => true)
-    .thenRespond(""" {"username": "john", "age": 65 } """)
-
-  def parseUserJson(a: Array[Byte]): User = ...
-
-  val response = sttp.get(uri"http://example.com")
-    .response(asByteArray.map(parseUserJson))
-    .send()
-
-In the example above, the stub's rules specify that a response with a ``String``-body should be returned for any request; the request, on the other hand, specifies that responses should be parsed from a byte array to a custom ``User`` type. These type don't match, so the ``SttpBackendStub`` will in this case convert the body to the desired type.
-
-Note that no conversions will be attempted for streaming response bodies.
-
-Delegating to another backend
------------------------------
-
-It is also possible to create a stub backend which delegates calls to another (possibly "real") backend if none of the specified predicates match a request. This can be useful during development, to partially stub a yet incomplete API with which we integrate::
-
-  implicit val testingBackend =
-    SttpBackendStub.withFallback(HttpURLConnectionBackend())
-      .whenRequestMatches(_.uri.path.startsWith(List("a")))
-      .thenRespond("I'm a STUB!")
-      
-  val response1 = sttp.get(uri"http://api.internal/a").send()
-  // response1.body will be Right("I'm a STUB")
-  
-  val response2 = sttp.post(uri"http://api.internal/b").send()
-  // response2 will be whatever a "real" network call to api.internal/b returns
-