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| 1 | +import { EventPublisher, Sender } from 'utils'; |
| 2 | +import { ISenderManagement } from 'sender-management'; |
| 3 | +import { GenerateReport } from 'digital-letters-events'; |
| 4 | +import { createHandler } from 'apis/scheduled-event-handler'; |
| 5 | +import GenerateReportValidator from 'digital-letters-events/GenerateReport.js'; |
| 6 | + |
| 7 | +describe('scheduled-event-handler', () => { |
| 8 | + let mockSenderManagement: jest.Mocked<ISenderManagement>; |
| 9 | + let mockEventPublisher: jest.Mocked<EventPublisher>; |
| 10 | + |
| 11 | + beforeEach(() => { |
| 12 | + mockSenderManagement = { |
| 13 | + listSenders: jest.fn(), |
| 14 | + } as unknown as jest.Mocked<ISenderManagement>; |
| 15 | + |
| 16 | + mockEventPublisher = { |
| 17 | + sendEvents: jest.fn(), |
| 18 | + } as unknown as jest.Mocked<EventPublisher>; |
| 19 | + |
| 20 | + jest.useFakeTimers(); |
| 21 | + }); |
| 22 | + |
| 23 | + afterEach(() => { |
| 24 | + jest.useRealTimers(); |
| 25 | + }); |
| 26 | + |
| 27 | + describe('createHandler', () => { |
| 28 | + it('should retrieve senders from sender management', async () => { |
| 29 | + mockSenderManagement.listSenders.mockResolvedValue([]); |
| 30 | + mockEventPublisher.sendEvents.mockResolvedValue([]); |
| 31 | + |
| 32 | + const handler = createHandler({ |
| 33 | + senderManagement: mockSenderManagement, |
| 34 | + eventPublisher: mockEventPublisher, |
| 35 | + }); |
| 36 | + |
| 37 | + await handler(); |
| 38 | + |
| 39 | + expect(mockSenderManagement.listSenders).toHaveBeenCalledTimes(1); |
| 40 | + }); |
| 41 | + |
| 42 | + it('should publish generate report events for each sender', async () => { |
| 43 | + const mockDate = new Date('2024-01-15T12:00:00.000Z'); |
| 44 | + jest.setSystemTime(mockDate); |
| 45 | + |
| 46 | + const mockSenders = [ |
| 47 | + { senderId: 'sender-1' }, |
| 48 | + { senderId: 'sender-2' }, |
| 49 | + { senderId: 'sender-3' }, |
| 50 | + ] as unknown as Sender[]; |
| 51 | + |
| 52 | + mockSenderManagement.listSenders.mockResolvedValue(mockSenders); |
| 53 | + mockEventPublisher.sendEvents.mockResolvedValue([]); |
| 54 | + |
| 55 | + const handler = createHandler({ |
| 56 | + senderManagement: mockSenderManagement, |
| 57 | + eventPublisher: mockEventPublisher, |
| 58 | + }); |
| 59 | + |
| 60 | + await handler(); |
| 61 | + |
| 62 | + expect(mockEventPublisher.sendEvents).toHaveBeenCalledTimes(1); |
| 63 | + const [[events, validator]] = mockEventPublisher.sendEvents.mock.calls; |
| 64 | + |
| 65 | + expect(events).toHaveLength(3); |
| 66 | + expect(validator).toBeDefined(); |
| 67 | + }); |
| 68 | + |
| 69 | + it('should create events with correct structure for each sender', async () => { |
| 70 | + const mockDate = new Date('2024-01-15T12:00:00.000Z'); |
| 71 | + jest.setSystemTime(mockDate); |
| 72 | + |
| 73 | + const mockSenders = [ |
| 74 | + { senderId: 'test-sender-123' }, |
| 75 | + ] as unknown as Sender[]; |
| 76 | + |
| 77 | + mockSenderManagement.listSenders.mockResolvedValue(mockSenders); |
| 78 | + mockEventPublisher.sendEvents.mockResolvedValue([]); |
| 79 | + |
| 80 | + const handler = createHandler({ |
| 81 | + senderManagement: mockSenderManagement, |
| 82 | + eventPublisher: mockEventPublisher, |
| 83 | + }); |
| 84 | + |
| 85 | + await handler(); |
| 86 | + |
| 87 | + const [[events]] = mockEventPublisher.sendEvents.mock.calls; |
| 88 | + const event = events[0] as GenerateReport; |
| 89 | + |
| 90 | + expect(event.data.senderId).toBe('test-sender-123'); |
| 91 | + expect(event.data.reportDate).toBe('2024-01-14'); |
| 92 | + expect(event.specversion).toBe('1.0'); |
| 93 | + expect(event.id).toBeDefined(); |
| 94 | + expect(event.source).toBe( |
| 95 | + '/nhs/england/notify/production/primary/data-plane/digitalletters/reporting', |
| 96 | + ); |
| 97 | + expect(event.subject).toBe('customer/test-sender-123'); |
| 98 | + expect(event.type).toBe( |
| 99 | + 'uk.nhs.notify.digital.letters.reporting.generate.report.v1', |
| 100 | + ); |
| 101 | + expect(event.time).toBe('2024-01-15T12:00:00.000Z'); |
| 102 | + expect(event.severitynumber).toBe(2); |
| 103 | + |
| 104 | + const isEventValid = GenerateReportValidator(event); |
| 105 | + expect(GenerateReportValidator.errors).toBeNull(); |
| 106 | + expect(isEventValid).toBe(true); |
| 107 | + }); |
| 108 | + |
| 109 | + it('should handle empty sender list', async () => { |
| 110 | + mockSenderManagement.listSenders.mockResolvedValue([]); |
| 111 | + mockEventPublisher.sendEvents.mockResolvedValue([]); |
| 112 | + |
| 113 | + const handler = createHandler({ |
| 114 | + senderManagement: mockSenderManagement, |
| 115 | + eventPublisher: mockEventPublisher, |
| 116 | + }); |
| 117 | + |
| 118 | + await handler(); |
| 119 | + |
| 120 | + const [[events]] = mockEventPublisher.sendEvents.mock.calls; |
| 121 | + expect(events).toHaveLength(0); |
| 122 | + }); |
| 123 | + |
| 124 | + it('should handle event publisher errors', async () => { |
| 125 | + const mockSenders = [{ senderId: 'sender-1' }] as unknown as Sender[]; |
| 126 | + const error = new Error('Failed to publish events'); |
| 127 | + |
| 128 | + mockSenderManagement.listSenders.mockResolvedValue(mockSenders); |
| 129 | + mockEventPublisher.sendEvents.mockRejectedValue(error); |
| 130 | + |
| 131 | + const handler = createHandler({ |
| 132 | + senderManagement: mockSenderManagement, |
| 133 | + eventPublisher: mockEventPublisher, |
| 134 | + }); |
| 135 | + |
| 136 | + await expect(handler()).rejects.toThrow('Failed to publish events'); |
| 137 | + }); |
| 138 | + |
| 139 | + it('should generate unique event IDs for multiple senders', async () => { |
| 140 | + const mockSenders = [ |
| 141 | + { senderId: 'sender-1' }, |
| 142 | + { senderId: 'sender-2' }, |
| 143 | + ] as unknown as Sender[]; |
| 144 | + |
| 145 | + mockSenderManagement.listSenders.mockResolvedValue(mockSenders); |
| 146 | + mockEventPublisher.sendEvents.mockResolvedValue([]); |
| 147 | + |
| 148 | + const handler = createHandler({ |
| 149 | + senderManagement: mockSenderManagement, |
| 150 | + eventPublisher: mockEventPublisher, |
| 151 | + }); |
| 152 | + |
| 153 | + await handler(); |
| 154 | + |
| 155 | + const [[events]] = mockEventPublisher.sendEvents.mock.calls; |
| 156 | + const eventIds = events.map((e) => e.id); |
| 157 | + |
| 158 | + expect(new Set(eventIds).size).toBe(eventIds.length); |
| 159 | + }); |
| 160 | + }); |
| 161 | +}); |
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