feat: Create a RoutingResourceStore that takes routing rules

test/unit/storage/routing/ConvertingRouterRule.test.ts

@@ -0,0 +1,81 @@
+import type { Readable } from 'stream';
+import type { Representation } from '../../../../src/ldp/representation/Representation';
+import { RepresentationMetadata } from '../../../../src/ldp/representation/RepresentationMetadata';
+import type { ResourceStore } from '../../../../src/storage/ResourceStore';
+import { ConvertingRouterRule } from '../../../../src/storage/routing/ConvertingRouterRule';
+import type { PreferenceSupport } from '../../../../src/storage/routing/PreferenceSupport';
+import { InternalServerError } from '../../../../src/util/errors/InternalServerError';
+import { NotFoundHttpError } from '../../../../src/util/errors/NotFoundHttpError';
+
+describe('A ConvertingRouterRule', (): void => {
+  let store1: ResourceStore;
+  let store2: ResourceStore;
+  let defaultStore: ResourceStore;
+  let checker1: PreferenceSupport;
+  let checker2: PreferenceSupport;
+  let rule: ConvertingRouterRule;
+  let representation: Representation;
+  let metadata: RepresentationMetadata;
+
+  beforeEach(async(): Promise<void> => {
+    store1 = { name: 'turtleStore' } as any;
+    store2 = { name: 'textStore' } as any;
+    defaultStore = { name: 'defaultStore' } as any;
+
+    checker1 = {
+      async supports(input: { representation: Representation }): Promise<boolean> {
+        return input.representation.metadata.contentType === 'text/turtle';
+      },
+    } as any;
+    checker2 = {
+      async supports(input: { representation: Representation }): Promise<boolean> {
+        return input.representation.metadata.contentType === 'application/ld+json';
+      },
+    } as any;
+
+    rule = new ConvertingRouterRule([{ store: store1, supportChecker: checker1 },
+      { store: store2, supportChecker: checker2 }], defaultStore);
+
+    metadata = new RepresentationMetadata();
+    representation = { binary: true, data: 'data!' as any, metadata };
+  });
+
+  it('returns the corresponding store if it supports the input.', async(): Promise<void> => {
+    metadata.contentType = 'text/turtle';
+    await expect(rule.handle({ identifier: { path: 'identifier' }, representation })).resolves.toBe(store1);
+
+    metadata.contentType = 'application/ld+json';
+    await expect(rule.handle({ identifier: { path: 'identifier' }, representation })).resolves.toBe(store2);
+  });
+
+  it('returns the defaultStore if the converter does not support the input.', async(): Promise<void> => {
+    await expect(rule.handle({ identifier: { path: 'identifier' }, representation })).resolves.toBe(defaultStore);
+  });
+
+  it('checks if the stores contain the identifier if there is no data.', async(): Promise<void> => {
+    const data: Readable = { destroy: jest.fn() } as any;
+    store1.getRepresentation = (): any => {
+      throw new NotFoundHttpError();
+    };
+    store2.getRepresentation = async(): Promise<Representation> => ({ data } as any);
+    await expect(rule.handle({ identifier: { path: 'identifier' }})).resolves.toBe(store2);
+    expect(data.destroy).toHaveBeenCalledTimes(1);
+  });
+
+  it('returns the defaultStore if no other store has the resource.', async(): Promise<void> => {
+    store1.getRepresentation = (): any => {
+      throw new NotFoundHttpError();
+    };
+    store2.getRepresentation = (): any => {
+      throw new NotFoundHttpError();
+    };
+    await expect(rule.handle({ identifier: { path: 'identifier' }})).resolves.toBe(defaultStore);
+  });
+
+  it('throws the error if a store had a non-404 error.', async(): Promise<void> => {
+    store1.getRepresentation = (): any => {
+      throw new InternalServerError();
+    };
+    await expect(rule.handle({ identifier: { path: 'identifier' }})).rejects.toThrow(InternalServerError);
+  });
+});