feat: Add total slowest test + percent change resolvers in API (#896)

Author: ajay-sentry

graphql_api/tests/test_test_results_headers.py

@@ -137,3 +137,30 @@ def test_fetch_test_result_skipped_tests(self) -> None:
             ]
             == 29
         )
+
+    def test_fetch_test_result_slow_tests(self) -> None:
+        query = """
+            query {
+            owner(username: "%s") {
+                    repository(name: "%s") {
+                        ... on Repository {
+                            testAnalytics {
+                                testResultsAggregates {
+                                    totalSlowTests
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        """ % (self.owner.username, self.repository.name)
+
+        result = self.gql_request(query, owner=self.owner)
+
+        assert "errors" not in result
+        assert (
+            result["owner"]["repository"]["testAnalytics"]["testResultsAggregates"][
+                "totalSlowTests"
+            ]
+            == 1
+        )

graphql_api/types/test_results_aggregates/test_results_aggregates.py

@@ -11,6 +11,8 @@ class TestResultsAggregates(TypedDict):
     total_duration_percent_change: float | None
     slowest_tests_duration: float
     slowest_tests_duration_percent_change: float | None
+    total_slow_tests: int
+    total_slow_tests_percent_change: float | None
     fails: int
     fails_percent_change: float | None
     skips: int
@@ -43,6 +45,18 @@ def resolve_slowest_tests_duration_percent_change(
     return obj.get("slowest_tests_duration_percent_change")
 
 
+@test_results_aggregates_bindable.field("totalSlowTests")
+def resolve_total_slow_tests(obj: TestResultsAggregates, _: GraphQLResolveInfo) -> int:
+    return obj["total_slow_tests"]
+
+
+@test_results_aggregates_bindable.field("totalSlowTestsPercentChange")
+def resolve_total_slow_tests_percent_change(
+    obj: TestResultsAggregates, _: GraphQLResolveInfo
+) -> float | None:
+    return obj.get("total_slow_tests_percent_change")
+
+
 @test_results_aggregates_bindable.field("totalFails")
 def resolve_total_fails(obj: TestResultsAggregates, _: GraphQLResolveInfo) -> int:
     return obj["fails"]