feat(api): add support for get for a MR approval rule

JohnVillalovos · JohnVillalovos · commit 89c18c6255ec · 2022-06-27T20:42:17.000-07:00
In GitLab 14.10 they added support to get a single merge request approval rule [1] Add support for it to ProjectMergeRequestApprovalRuleManager [1] https://docs.gitlab.com/ee/api/merge_request_approvals.html#get-a-single-merge-request-level-rule
diff --git a/docs/gl_objects/merge_request_approvals.rst b/docs/gl_objects/merge_request_approvals.rst
@@ -78,6 +78,11 @@ List MR-level MR approval rules::
 
 	mr.approval_rules.list()
 
+Get a single MR approval rule::
+
+    approval_rule_id = 123
+    mr_approvalrule = mr.approval_rules.get(approval_rule_id)
+
 Delete MR-level MR approval rule::
 
     rules = mr.approval_rules.list()
diff --git a/gitlab/v4/objects/merge_request_approvals.py b/gitlab/v4/objects/merge_request_approvals.py
@@ -1,9 +1,10 @@
-from typing import Any, cast, Dict, List, Optional, TYPE_CHECKING
+from typing import Any, cast, Dict, List, Optional, TYPE_CHECKING, Union
 
 from gitlab import exceptions as exc
 from gitlab.base import RESTManager, RESTObject
 from gitlab.mixins import (
     CreateMixin,
+    CRUDMixin,
     DeleteMixin,
     GetWithoutIdMixin,
     ListMixin,
@@ -189,9 +190,7 @@ def save(self, **kwargs: Any) -> None:
         SaveMixin.save(self, **kwargs)
 
 
-class ProjectMergeRequestApprovalRuleManager(
-    ListMixin, UpdateMixin, CreateMixin, DeleteMixin, RESTManager
-):
+class ProjectMergeRequestApprovalRuleManager(CRUDMixin, RESTManager):
     _path = "/projects/{project_id}/merge_requests/{mr_iid}/approval_rules"
     _obj_cls = ProjectMergeRequestApprovalRule
     _from_parent_attrs = {"project_id": "project_id", "mr_iid": "iid"}
@@ -214,6 +213,13 @@ class ProjectMergeRequestApprovalRuleManager(
         optional=("approval_project_rule_id", "user_ids", "group_ids"),
     )
 
+    def get(
+        self, id: Union[str, int], lazy: bool = False, **kwargs: Any
+    ) -> ProjectMergeRequestApprovalRule:
+        return cast(
+            ProjectMergeRequestApprovalRule, super().get(id=id, lazy=lazy, **kwargs)
+        )
+
     def create(
         self, data: Optional[Dict[str, Any]] = None, **kwargs: Any
     ) -> RESTObject:
diff --git a/tests/unit/objects/test_project_merge_request_approvals.py b/tests/unit/objects/test_project_merge_request_approvals.py
@@ -100,6 +100,13 @@ def resp_mr_approval_rules():
             content_type="application/json",
             status=200,
         )
+        rsps.add(
+            method=responses.GET,
+            url="http://localhost/api/v4/projects/1/merge_requests/1/approval_rules/1",
+            json=mr_ars_content[0],
+            content_type="application/json",
+            status=200,
+        )
         rsps.add(
             method=responses.GET,
             url="http://localhost/api/v4/projects/1/merge_requests/1/approval_state",
@@ -243,6 +250,17 @@ def test_update_merge_request_approval_rule(project, resp_mr_approval_rules):
     assert ar_1.eligible_approvers[0]["id"] == updated_approval_rule_user_ids[0]
 
 
+def test_get_merge_request_approval_rule(project, resp_mr_approval_rules):
+    merge_request = project.mergerequests.get(1, lazy=True)
+    approval_rule = merge_request.approval_rules.get(approval_rule_id)
+    assert isinstance(
+        approval_rule,
+        gitlab.v4.objects.merge_request_approvals.ProjectMergeRequestApprovalRule,
+    )
+    assert approval_rule.name == approval_rule_name
+    assert approval_rule.id == approval_rule_id
+
+
 def test_get_merge_request_approval_state(project, resp_mr_approval_rules):
     merge_request = project.mergerequests.get(1, lazy=True)
     approval_state = merge_request.approval_state.get()
