tests: Switch to openapi-core 0.13.x

We've done the necessary work here already so this is a relatively easy
switchover. However, we do have to work around an issue whereby the
first possible matching route is used rather than the best one [1]. In
addition, we have to install from master since there are fixes missing
from the latest release, 0.13.3. Hopefully both issues will be resolved
in a future release.

[1] https://github.com/p1c2u/openapi-core/issues/226

Signed-off-by: Stephen Finucane <stephen@that.guru>

2 files changed, 20 insertions, 175 deletions

diff --git a/patchwork/tests/api/validator.py b/patchwork/tests/api/validator.py
index b046f4e..8ae8918 100644
--- a/patchwork/tests/api/validator.py
+++ b/patchwork/tests/api/validator.py
@@ -7,15 +7,15 @@ import os
 import re
 
 from django.urls import resolve
-from django.urls.resolvers import get_resolver
 import openapi_core
+from openapi_core.contrib.django import DjangoOpenAPIResponseFactory
+from openapi_core.contrib.django import DjangoOpenAPIRequestFactory
 from openapi_core.schema.schemas.models import Format
-from openapi_core.wrappers.base import BaseOpenAPIResponse
-from openapi_core.wrappers.base import BaseOpenAPIRequest
 from openapi_core.validation.request.validators import RequestValidator
 from openapi_core.validation.response.validators import ResponseValidator
 from openapi_core.schema.parameters.exceptions import OpenAPIParameterError
 from openapi_core.schema.media_types.exceptions import OpenAPIMediaTypeError
+from openapi_core.templating import util
 from rest_framework import status
 import yaml
 
@@ -24,13 +24,23 @@ SCHEMAS_DIR = os.path.join(
     os.path.dirname(os.path.abspath(__file__)), os.pardir, os.pardir,
     os.pardir, 'docs', 'api', 'schemas')
 
-HEADER_REGEXES = (
-    re.compile(r'^HTTP_.+$'), re.compile(r'^CONTENT_TYPE$'),
-    re.compile(r'^CONTENT_LENGTH$'))
-
 _LOADED_SPECS = {}
 
 
+# HACK! Workaround for https://github.com/p1c2u/openapi-core/issues/226
+def search(path_pattern, full_url_pattern):
+    p = util.Parser(path_pattern)
+    p._expression = p._expression + '$'
+    result = p.search(full_url_pattern)
+    if not result or any('/' in arg for arg in result.named.values()):
+        return None
+
+    return result
+
+
+util.search = search
+
+
 class RegexValidator(object):
 
     def __init__(self, regex):
@@ -61,113 +71,6 @@ CUSTOM_FORMATTERS = {
 }
 
 
-def _extract_headers(request):
-    request_headers = {}
-    for header in request.META:
-        for regex in HEADER_REGEXES:
-            if regex.match(header):
-                request_headers[header] = request.META[header]
-
-    return request_headers
-
-
-def _resolve(path, resolver=None):
-    """Resolve a given path to its matching regex (Django 2.x).
-
-    This is essentially a re-implementation of ``URLResolver.resolve`` that
-    builds and returns the matched regex instead of the view itself.
-
-    >>> _resolve('/api/1.0/patches/1/checks/')
-    "^api/(?:(?P<version>(1.0|1.1))/)patches/(?P<patch_id>[^/]+)/checks/$"
-    """
-    from django.urls.resolvers import URLResolver  # noqa
-    from django.urls.resolvers import RegexPattern  # noqa
-
-    resolver = resolver or get_resolver()
-    match = resolver.pattern.match(path)
-
-    # we dont handle any other type of pattern at the moment
-    assert isinstance(resolver.pattern, RegexPattern)
-
-    if not match:
-        return
-
-    if isinstance(resolver, URLResolver):
-        sub_path, args, kwargs = match
-        for sub_resolver in resolver.url_patterns:
-            sub_match = _resolve(sub_path, sub_resolver)
-            if not sub_match:
-                continue
-
-            kwargs.update(sub_match[2])
-            args += sub_match[1]
-
-            regex = resolver.pattern._regex + sub_match[0].lstrip('^')
-
-            return regex, args, kwargs
-    else:
-        _, args, kwargs = match
-        return resolver.pattern._regex, args, kwargs
-
-
-def _resolve_path_to_kwargs(path):
-    """Convert a path to the kwargs used to resolve it.
-
-    >>> resolve_path_to_kwargs('/api/1.0/patches/1/checks/')
-    {"patch_id": 1}
-    """
-    # TODO(stephenfin): Handle definition by args
-    _, _, kwargs = _resolve(path)
-
-    results = {}
-    for key, value in kwargs.items():
-        if key == 'version':
-            continue
-
-        if key == 'pk':
-            key = 'id'
-
-        results[key] = value
-
-    return results
-
-
-def _resolve_path_to_template(path):
-    """Convert a path to a template string.
-
-    >>> resolve_path_to_template('/api/1.0/patches/1/checks/')
-    "/api/{version}/patches/{patch_id}/checks/"
-    """
-    regex, _, _ = _resolve(path)
-    regex = re.match(regex, path)
-
-    result = ''
-    prev_index = 0
-    for index, group in enumerate(regex.groups(), 1):
-        if not group:  # group didn't match anything
-            continue
-
-        result += path[prev_index:regex.start(index)]
-        prev_index = regex.end(index)
-        # groupindex keys by name, not index. Switch that.
-        for name, index_ in regex.re.groupindex.items():
-            if index_ == (index):
-                # special-case version group
-                if name == 'version':
-                    result += group
-                    break
-
-                if name == 'pk':
-                    name = 'id'
-
-                result += '{%s}' % name
-                break
-
-    result += path[prev_index:]
-
-    return result
-
-
 def _load_spec(version):
     global _LOADED_SPECS
 
@@ -186,72 +89,14 @@ def _load_spec(version):
     return _LOADED_SPECS[version]
 
 
-class DRFOpenAPIRequest(BaseOpenAPIRequest):
-
-    def __init__(self, request):
-        self.request = request
-
-    @property
-    def host_url(self):
-        return self.request.get_host()
-
-    @property
-    def path(self):
-        return self.request.path
-
-    @property
-    def method(self):
-        return self.request.method.lower()
-
-    @property
-    def path_pattern(self):
-        return _resolve_path_to_template(self.request.path_info)
-
-    @property
-    def parameters(self):
-        return {
-            'path': _resolve_path_to_kwargs(self.request.path_info),
-            'query': self.request.GET,
-            'header': _extract_headers(self.request),
-            'cookie': self.request.COOKIES,
-        }
-
-    @property
-    def body(self):
-        return self.request.body.decode('utf-8')
-
-    @property
-    def mimetype(self):
-        return self.request.content_type
-
-
-class DRFOpenAPIResponse(BaseOpenAPIResponse):
-
-    def __init__(self, response):
-        self.response = response
-
-    @property
-    def data(self):
-        return self.response.content.decode('utf-8')
-
-    @property
-    def status_code(self):
-        return self.response.status_code
-
-    @property
-    def mimetype(self):
-        # TODO(stephenfin): Why isn't this populated?
-        return 'application/json'
-
-
 def validate_data(path, request, response, validate_request,
                   validate_response):
     if response.status_code == status.HTTP_405_METHOD_NOT_ALLOWED:
         return
 
     spec = _load_spec(resolve(path).kwargs.get('version'))
-    request = DRFOpenAPIRequest(request)
-    response = DRFOpenAPIResponse(response)
+    request = DjangoOpenAPIRequestFactory.create(request)
+    response = DjangoOpenAPIResponseFactory.create(response)
 
     # request
     if validate_request:
diff --git a/requirements-test.txt b/requirements-test.txt
index 4235f37..5afe243 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -2,4 +2,4 @@ mysqlclient~=1.4.4
 psycopg2-binary~=2.8.0
 sqlparse~=0.3.0
 python-dateutil~=2.8.0
-openapi-core~=0.8.0
+https://github.com/p1c2u/openapi-core/archive/97ec8c796746f72ef3298fe92078b5f80e1f66f7.tar.gz