feat: Split up IDP HTML, routing, and handler behaviour

test/unit/identity/interaction/PromptHandler.test.ts

@@ -0,0 +1,37 @@
+import type { Operation } from '../../../../src/http/Operation';
+import type { Interaction } from '../../../../src/identity/interaction/InteractionHandler';
+import { PromptHandler } from '../../../../src/identity/interaction/PromptHandler';
+import type { InteractionRoute } from '../../../../src/identity/interaction/routing/InteractionRoute';
+import { BadRequestHttpError } from '../../../../src/util/errors/BadRequestHttpError';
+
+describe('A PromptHandler', (): void => {
+  const operation: Operation = { target: { path: 'http://example.com/test/' }} as any;
+  let oidcInteraction: Interaction;
+  let promptRoutes: Record<string, jest.Mocked<InteractionRoute>>;
+  let handler: PromptHandler;
+
+  beforeEach(async(): Promise<void> => {
+    oidcInteraction = { prompt: { name: 'login' }} as any;
+    promptRoutes = {
+      login: { getPath: jest.fn().mockReturnValue('http://example.com/idp/login/') } as any,
+    };
+    handler = new PromptHandler(promptRoutes);
+  });
+
+  it('errors if there is no interaction.', async(): Promise<void> => {
+    await expect(handler.handle({ operation })).rejects.toThrow(BadRequestHttpError);
+  });
+
+  it('errors if the prompt is unsupported.', async(): Promise<void> => {
+    oidcInteraction.prompt.name = 'unsupported';
+    await expect(handler.handle({ operation, oidcInteraction })).rejects.toThrow(BadRequestHttpError);
+  });
+
+  it('throws a redirect error with the correct location.', async(): Promise<void> => {
+    const error = expect.objectContaining({
+      statusCode: 302,
+      location: 'http://example.com/idp/login/',
+    });
+    await expect(handler.handle({ operation, oidcInteraction })).rejects.toThrow(error);
+  });
+});