Adds prefixes to current context AFTER route resolution

[Natan16]

Closes #6

[CLAassistant]

All committers have signed the CLA.

[Natan16]

Test missing for the recently added behavior

[ecarrara]

Suggested change

	assert mock_set_prefix.call_args_list[0].kwargs == {"key": "view_name", "value": "hello_world"}
	assert mock_set_prefix.call_args_list[1].kwargs == {"key": "route", "value": "/hello"}
	assert mock_remove_prefix.call_args_list[0].args[0] == "view_name"
	assert mock_remove_prefix.call_args_list[1].args[0] == "route"
	mock_set_prefix.assert_has_calls(
	[
	mock.call(key="view_name", value=f"test_middlewares.hello_world"),
	mock.call(key="route", value=f"/hello"),
	]
	)
	mock_remove_prefix.assert_has_calls(
	[
	mock.call("view_name"),
	mock.call("route"),
	],
	)