[test] Get rid of mockldap

Mockldap dependency is not supported for a long time. It can't be
installed to the latest Ubuntu versions, due to some of its old version
implicit dependencies (funcparserlib). For this reason the usage of
mockldap module has been eliminated and a simplified mock class has been
introduced instead with hardcoded return values.

This error could be reproduced by "make venv_dev" command which emitted
this error message:
"error in funcparserlib setup command: use_2to3 is invalid."

Fixes #3892

.github/workflows/test.yml

@@ -164,6 +164,7 @@ jobs:
           export PGPASSFILE=$HOME/.pgpass
 
           make pip_dev_deps
+          pip3 install -r web/requirements_py/auth/requirements.txt
           BUILD_UI_DIST=NO make package
 
           make -C web test_matrix_${{ matrix.database }}

web/requirements_py/dev/requirements.txt

@@ -8,7 +8,6 @@ psutil==5.8.0
 portalocker==2.2.1
 pylint==2.8.2
 nose==1.3.7
-mockldap==0.3.0
 mkdocs==1.2.3
 mypy_extensions==0.4.3
 coverage==5.5.0

web/server/tests/unit/test_ccldap.py

@@ -11,12 +11,51 @@
 
 
 import unittest
-
-from mockldap import MockLdap
+from unittest.mock import patch
 
 from codechecker_server.auth import cc_ldap
 
 
+class MockLdap:
+    def __init__(self, directory) -> None:
+        self.directory = directory
+
+    def simple_bind_s(
+        self,
+        who=None,
+        cred=None,
+        serverctrls=None,
+        clientctrls=None
+    ):
+        success = False
+
+        if not who and not cred:
+            success = True
+        elif cred in self.directory[who.lower()]['userPassword']:
+            success = True
+
+        return 42 if success else None
+
+    def unbind(self):
+        pass
+
+    def whoami_s(self):
+        return "Joe"
+
+    def search_s(
+        self,
+        base,
+        scope,
+        filterstr='(objectClass=*)',
+        attrlist=None,
+        attrsonly=0
+    ):
+        if base == 'ou=other,o=test' and filterstr == '(cn=user2)':
+            return [(
+                'cn=user2,ou=other,o=test',
+                {'cn': ['user2'], 'userPassword': ['user2pw']})]
+
+
 class CCLDAPTest(unittest.TestCase):
 
     top = ('o=test', {'o': ['test']})
@@ -46,19 +85,10 @@ class CCLDAPTest(unittest.TestCase):
                    "groupNameAttr": ""
                    }
 
-    @classmethod
-    def setup_class(cls):
-        cls.mockldap = MockLdap(cls.directory)
-
     def setUp(self):
-        # Patch ldap.initialize
-        self.mockldap.start()
-        self.ldapobj = self.mockldap['ldap://localhost/']
-
-    def tearDown(self):
-        # Stop patching ldap.initialize and reset state.
-        self.mockldap.stop()
-        del self.ldapobj
+        self.ldap_patcher = patch('ldap.initialize')
+        self.mock_ldap = self.ldap_patcher.start()
+        self.mock_ldap.return_value = MockLdap(self.directory)
 
     def test_empty_config(self):
         """