feat: add static typed test for consistency

Fixes #71

test/Type.spec.ts

@@ -0,0 +1,344 @@
+import {assert, Has, IsAny, IsNever, NotHas} from 'conditional-type-checks';
+import {SCThing, SCThingWithoutReferences} from '../src/core/Thing';
+import {SCAcademicEvent, SCAcademicEventWithoutReferences} from '../src/core/things/AcademicEvent';
+import {SCArticle, SCArticleWithoutReferences} from '../src/core/things/Article';
+import {SCBook, SCBookWithoutReferences} from '../src/core/things/Book';
+import {SCBuilding, SCBuildingWithoutReferences} from '../src/core/things/Building';
+import {SCCatalog, SCCatalogWithoutReferences} from '../src/core/things/Catalog';
+import {SCCourseOfStudies, SCCourseOfStudiesWithoutReferences} from '../src/core/things/CourseOfStudies';
+import {SCDateSeries, SCDateSeriesWithoutReferences} from '../src/core/things/DateSeries';
+import {SCDiff, SCDiffWithoutReferences} from '../src/core/things/Diff';
+import {SCDish, SCDishWithoutReferences} from '../src/core/things/Dish';
+import {SCFavorite, SCFavoriteWithoutReferences} from '../src/core/things/Favorite';
+import {SCFloor, SCFloorWithoutReferences} from '../src/core/things/Floor';
+import {SCMessage, SCMessageWithoutReferences} from '../src/core/things/Message';
+import {SCOrganization, SCOrganizationWithoutReferences} from '../src/core/things/Organization';
+import {SCPerson, SCPersonWithoutReferences} from '../src/core/things/Person';
+import {SCPointOfInterest, SCPointOfInterestWithoutReferences} from '../src/core/things/PointOfInterest';
+import {SCRoom, SCRoomWithoutReferences} from '../src/core/things/Room';
+import {SCSemester, SCSemesterWithoutReferences} from '../src/core/things/Semester';
+import {SCSetting, SCSettingWithoutReferences} from '../src/core/things/Setting';
+import {SCSportCourse, SCSportCourseWithoutReferences} from '../src/core/things/SportCourse';
+import {SCStudyModule, SCStudyModuleWithoutReferences} from '../src/core/things/StudyModule';
+import {SCTicket, SCTicketWithoutReferences} from '../src/core/things/Ticket';
+import {SCToDo, SCToDoWithoutReferences} from '../src/core/things/ToDo';
+import {SCTour, SCTourWithoutReferences} from '../src/core/things/Tour';
+import {SCVideo, SCVideoWithoutReferences} from '../src/core/things/Video';
+
+/**
+ * Check if E extends T
+ */
+type Extends<E, T> = E extends T ? true : false;
+
+/**
+ * Get type of array elements up to nesting level 3
+ */
+type ElementType<T> = T extends any[] ?
+  (T[0] extends any[] ?
+    (T[0][0] extends any[] ?
+      T[0][0][0] : T[0][0]) : T[0]) : T;
+
+/**
+ * Get types of properties
+ *
+ * - Extracts only the properties which extend object and are not any.
+ * - If type is an array it returns the type of the elements.
+ */
+type PropertyTypes<T> = Extract<ElementType<T extends object ?
+  (IsAny<T[keyof T]> extends true ?
+    never : T[keyof T]) : never>
+  , object>;
+
+/**
+ * Get nested property types
+ */
+type PropertyTypesNested<T> = PropertyTypes<T> extends object ? PropertyTypes<PropertyTypes<T>> : PropertyTypes<T>;
+
+/**
+ * Types of properties of SCDiff
+ */
+type SCDiffPropertyTypes = PropertyTypesNested<SCDiff>;
+assert<NotHas<SCDiffPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCDiffPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCDiffPropertyTypes, SCThing>>(true);
+assert<Has<SCDiffPropertyTypes, SCThing>>(false);
+assert<Extends<SCDiffWithoutReferences, SCThing>>(false);
+assert<Extends<SCDiff, SCThing>>(true);
+
+/**
+ * Types of properties of SCAcademicEvent
+ */
+type SCAcademicEventPropertyTypes = PropertyTypesNested<SCAcademicEvent>;
+assert<NotHas<SCAcademicEventPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCAcademicEventPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCAcademicEventPropertyTypes, SCThing>>(true);
+assert<Has<SCAcademicEventPropertyTypes, SCThing>>(false);
+assert<Extends<SCAcademicEventWithoutReferences, SCThing>>(false);
+assert<Extends<SCAcademicEvent, SCThing>>(true);
+
+/**
+ * Types of properties of SCArticle
+ */
+type SCArticlePropertyTypes = PropertyTypesNested<SCArticle>;
+assert<NotHas<SCArticlePropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCArticlePropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCArticlePropertyTypes, SCThing>>(true);
+assert<Has<SCArticlePropertyTypes, SCThing>>(false);
+assert<Extends<SCArticleWithoutReferences, SCThing>>(false);
+assert<Extends<SCArticle, SCThing>>(true);
+
+/**
+ * Types of properties of SCBook
+ */
+type SCBookPropertyTypes = PropertyTypesNested<SCBook>;
+assert<NotHas<SCBookPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCBookPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCBookPropertyTypes, SCThing>>(true);
+assert<Has<SCBookPropertyTypes, SCThing>>(false);
+assert<Extends<SCBookWithoutReferences, SCThing>>(false);
+assert<Extends<SCBook, SCThing>>(true);
+
+/**
+ * Types of properties of SCBuilding
+ */
+type SCBuildingPropertyTypes = PropertyTypesNested<SCBuilding>;
+assert<NotHas<SCBuildingPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCBuildingPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCBuildingPropertyTypes, SCThing>>(true);
+assert<Has<SCBuildingPropertyTypes, SCThing>>(false);
+assert<Extends<SCBuildingWithoutReferences, SCThing>>(false);
+assert<Extends<SCBuilding, SCThing>>(true);
+
+/**
+ * Types of properties of SCCatalog
+ */
+type SCCatalogPropertyTypes = PropertyTypesNested<SCCatalog>;
+assert<NotHas<SCCatalogPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCCatalogPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCCatalogPropertyTypes, SCThing>>(true);
+assert<Has<SCCatalogPropertyTypes, SCThing>>(false);
+assert<Extends<SCCatalogWithoutReferences, SCThing>>(false);
+assert<Extends<SCCatalog, SCThing>>(true);
+
+/**
+ * Types of properties of SCCourseOfStudies
+ */
+type SCCourseOfStudiesPropertyTypes = PropertyTypesNested<SCCourseOfStudies>;
+assert<NotHas<SCCourseOfStudiesPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCCourseOfStudiesPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCCourseOfStudiesPropertyTypes, SCThing>>(true);
+assert<Has<SCCourseOfStudiesPropertyTypes, SCThing>>(false);
+assert<Extends<SCCourseOfStudiesWithoutReferences, SCThing>>(false);
+assert<Extends<SCCourseOfStudies, SCThing>>(true);
+
+/**
+ * Types of properties of SCDateSeries
+ */
+type SCDateSeriesPropertyTypes = PropertyTypesNested<SCDateSeries>;
+assert<NotHas<SCDateSeriesPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCDateSeriesPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCDateSeriesPropertyTypes, SCThing>>(true);
+assert<Has<SCDateSeriesPropertyTypes, SCThing>>(false);
+assert<Extends<SCDateSeriesWithoutReferences, SCThing>>(false);
+assert<Extends<SCDateSeries, SCThing>>(true);
+
+/**
+ * Types of properties of SCDish
+ */
+type SCDishPropertyTypes = PropertyTypesNested<SCDish>;
+assert<NotHas<SCDishPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCDishPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCDishPropertyTypes, SCThing>>(true);
+assert<Has<SCDishPropertyTypes, SCThing>>(false);
+assert<Extends<SCDishWithoutReferences, SCThing>>(false);
+assert<Extends<SCDish, SCThing>>(true);
+
+/**
+ * Types of properties of SCFavorite
+ */
+type SCFavoritePropertyTypes = PropertyTypesNested<SCFavorite>;
+assert<NotHas<SCFavoritePropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCFavoritePropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCFavoritePropertyTypes, SCThing>>(true);
+assert<Has<SCFavoritePropertyTypes, SCThing>>(false);
+assert<Extends<SCFavoriteWithoutReferences, SCThing>>(false);
+assert<Extends<SCFavorite, SCThing>>(true);
+
+/**
+ * Types of properties of SCFloor
+ */
+type SCFloorPropertyTypes = PropertyTypesNested<SCFloor>;
+assert<NotHas<SCFloorPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCFloorPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCFloorPropertyTypes, SCThing>>(true);
+assert<Has<SCFloorPropertyTypes, SCThing>>(false);
+assert<Extends<SCFloorWithoutReferences, SCThing>>(false);
+assert<Extends<SCFloor, SCThing>>(true);
+
+/**
+ * Types of properties of SCMessage
+ */
+type SCMessagePropertyTypes = PropertyTypesNested<SCMessage>;
+assert<NotHas<SCMessagePropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCMessagePropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCMessagePropertyTypes, SCThing>>(true);
+assert<Has<SCMessagePropertyTypes, SCThing>>(false);
+assert<Extends<SCMessageWithoutReferences, SCThing>>(false);
+assert<Extends<SCMessage, SCThing>>(true);
+
+/**
+ * Types of properties of SCOrganization
+ */
+type SCOrganizationPropertyTypes = PropertyTypesNested<SCOrganization>;
+assert<NotHas<SCOrganizationPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCOrganizationPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCOrganizationPropertyTypes, SCThing>>(true);
+assert<Has<SCOrganizationPropertyTypes, SCThing>>(false);
+assert<Extends<SCOrganizationWithoutReferences, SCThing>>(false);
+assert<Extends<SCOrganization, SCThing>>(true);
+
+/**
+ * Types of properties of SCPerson
+ */
+type SCPersonPropertyTypes = PropertyTypesNested<SCPerson>;
+assert<NotHas<SCPersonPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCPersonPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCPersonPropertyTypes, SCThing>>(true);
+assert<Has<SCPersonPropertyTypes, SCThing>>(false);
+assert<Extends<SCPersonWithoutReferences, SCThing>>(false);
+assert<Extends<SCPerson, SCThing>>(true);
+
+/**
+ * Types of properties of SCPointOfInterest
+ */
+type SCPointOfInterestPropertyTypes = PropertyTypesNested<SCPointOfInterest>;
+assert<NotHas<SCPointOfInterestPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCPointOfInterestPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCPointOfInterestPropertyTypes, SCThing>>(true);
+assert<Has<SCPointOfInterestPropertyTypes, SCThing>>(false);
+assert<Extends<SCPointOfInterestWithoutReferences, SCThing>>(false);
+assert<Extends<SCPointOfInterest, SCThing>>(true);
+
+/**
+ * Types of properties of SCRoom
+ */
+type SCRoomPropertyTypes = PropertyTypesNested<SCRoom>;
+assert<NotHas<SCRoomPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCRoomPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCRoomPropertyTypes, SCThing>>(true);
+assert<Has<SCRoomPropertyTypes, SCThing>>(false);
+assert<Extends<SCRoomWithoutReferences, SCThing>>(false);
+assert<Extends<SCRoom, SCThing>>(true);
+
+/**
+ * Types of properties of SCSemester
+ */
+type SCSemesterPropertyTypes = PropertyTypesNested<SCSemester>;
+assert<NotHas<SCSemesterPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCSemesterPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCSemesterPropertyTypes, SCThing>>(true);
+assert<Has<SCSemesterPropertyTypes, SCThing>>(false);
+assert<Extends<SCSemesterWithoutReferences, SCThing>>(false);
+assert<Extends<SCSemester, SCThing>>(true);
+
+/**
+ * Types of properties of SCSetting
+ */
+type SCSettingPropertyTypes = PropertyTypesNested<SCSetting>;
+assert<NotHas<SCSettingPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCSettingPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCSettingPropertyTypes, SCThing>>(true);
+assert<Has<SCSettingPropertyTypes, SCThing>>(false);
+assert<Extends<SCSettingWithoutReferences, SCThing>>(false);
+assert<Extends<SCSetting, SCThing>>(true);
+
+/**
+ * Types of properties of SCSportCourse
+ */
+type SCSportCoursePropertyTypes = PropertyTypesNested<SCSportCourse>;
+assert<NotHas<SCSportCoursePropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCSportCoursePropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCSportCoursePropertyTypes, SCThing>>(true);
+assert<Has<SCSportCoursePropertyTypes, SCThing>>(false);
+assert<Extends<SCSportCourseWithoutReferences, SCThing>>(false);
+assert<Extends<SCSportCourse, SCThing>>(true);
+
+/**
+ * Types of properties of SCStudyModule
+ */
+type SCStudyModulePropertyTypes = PropertyTypesNested<SCStudyModule>;
+assert<NotHas<SCStudyModulePropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCStudyModulePropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCStudyModulePropertyTypes, SCThing>>(true);
+assert<Has<SCStudyModulePropertyTypes, SCThing>>(false);
+assert<Extends<SCStudyModuleWithoutReferences, SCThing>>(false);
+assert<Extends<SCStudyModule, SCThing>>(true);
+
+/**
+ * Types of properties of SCTicket
+ */
+type SCTicketPropertyTypes = PropertyTypesNested<SCTicket>;
+assert<NotHas<SCTicketPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCTicketPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCTicketPropertyTypes, SCThing>>(true);
+assert<Has<SCTicketPropertyTypes, SCThing>>(false);
+assert<Extends<SCTicketWithoutReferences, SCThing>>(false);
+assert<Extends<SCTicket, SCThing>>(true);
+
+/**
+ * Types of properties of SCToDo
+ */
+type SCToDoPropertyTypes = PropertyTypesNested<SCToDo>;
+assert<NotHas<SCToDoPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCToDoPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCToDoPropertyTypes, SCThing>>(true);
+assert<Has<SCToDoPropertyTypes, SCThing>>(false);
+assert<Extends<SCToDoWithoutReferences, SCThing>>(false);
+assert<Extends<SCToDo, SCThing>>(true);
+
+/**
+ * Types of properties of SCToDo
+ */
+type SCTourPropertyTypes = PropertyTypesNested<SCTour>;
+assert<NotHas<SCTourPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCTourPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCTourPropertyTypes, SCThing>>(true);
+assert<Has<SCTourPropertyTypes, SCThing>>(false);
+assert<Extends<SCTourWithoutReferences, SCThing>>(false);
+assert<Extends<SCTour, SCThing>>(true);
+
+/**
+ * Types of properties of SCVideo
+ */
+type SCVideoPropertyTypes = PropertyTypesNested<SCVideo>;
+assert<NotHas<SCVideoPropertyTypes, SCThingWithoutReferences>>(false);
+assert<Has<SCVideoPropertyTypes, SCThingWithoutReferences>>(true);
+assert<NotHas<SCVideoPropertyTypes, SCThing>>(true);
+assert<Has<SCVideoPropertyTypes, SCThing>>(false);
+assert<Extends<SCVideoWithoutReferences, SCThing>>(false);
+assert<Extends<SCVideo, SCThing>>(true);
+
+/**
+ * Dummy interface, to check if union types still resolve to any if one of the members is any
+ */
+interface Foo {
+  bar: SCPerson;
+  foo: any;
+}
+
+/**
+ * Type that is unfortunately never - blame TypeScript
+ */
+type UnfortunatelyNever = PropertyTypesNested<Foo>;
+assert<IsNever<UnfortunatelyNever>>(true);
+
+/**
+ * Flat property types
+ */
+type FlatPropertyTypes<T> = T[keyof T];
+
+/**
+ * Type that is unfortunately any - blame TypeScript
+ */
+type UnfortunatelyAny = FlatPropertyTypes<Foo>;
+assert<IsAny<UnfortunatelyAny>>(true);