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Add MI schema validation tests and example event JSON files
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‎internal/events/jest.config.ts‎

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export default {
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import type { Config } from "jest";
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export const baseJestConfig: Config = {
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preset: "ts-jest",
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testEnvironment: "node",
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testMatch: ["**/__tests__/**/*.ts", "**/?(*.)+(spec|test).ts"],
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testPathIgnorePatterns: ["<rootDir>/dist/"],
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moduleFileExtensions: ["ts", "js", "json", "node"],
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transform: {
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"^.+\\.ts$": ["ts-jest", { tsconfig: "<rootDir>/tsconfig.jest.json" }],
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// Automatically clear mock calls, instances, contexts and results before every test
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clearMocks: true,
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// Indicates whether the coverage information should be collected while executing the test
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collectCoverage: true,
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// The directory where Jest should output its coverage files
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coverageDirectory: "./.reports/unit/coverage",
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// Indicates which provider should be used to instrument code for coverage
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coverageProvider: "babel",
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coverageThreshold: {
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global: {
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branches: 100,
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functions: 100,
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lines: 100,
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statements: -10,
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},
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},
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coveragePathIgnorePatterns: ["/__tests__/"],
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transform: { "^.+\\.ts$": "ts-jest" },
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testPathIgnorePatterns: [".build"],
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testMatch: ["**/?(*.)+(spec|test).[jt]s?(x)"],
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// Use this configuration option to add custom reporters to Jest
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reporters: [
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"default",
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[
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"jest-html-reporter",
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{
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pageTitle: "Test Report",
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outputPath: "./.reports/unit/test-report.html",
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includeFailureMsg: true,
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},
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],
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],
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// The test environment that will be used for testing
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testEnvironment: "jsdom",
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};
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export default baseJestConfig;

‎internal/events/src/domain/__tests__/mi.test.ts‎

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import {
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$MI,
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MI,
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} from "@nhsdigital/nhs-notify-event-schemas-supplier-api/src/domain/mi";
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describe("MI schema validation", () => {
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const validMIEvent: MI = {
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id: "mi-001",
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lineItem: "LETTER_PRINT_A4",
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timestamp: "2025-11-16T10:30:00.000Z",
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quantity: 150,
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specificationId: "spec-123",
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groupId: "group-456",
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stockRemaining: 1000,
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supplierId: "supplier-789",
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createdAt: "2025-11-16T10:30:00.000Z",
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updatedAt: "2025-11-16T10:30:00.000Z",
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};
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describe("basic validation", () => {
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it("should validate a valid MI event with all fields", () => {
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const result = $MI.safeParse(validMIEvent);
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expect(result.success).toBe(true);
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expect(result.error).toBeUndefined();
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expect(result.data).toEqual(validMIEvent);
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});
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it("should validate an MI event without optional fields", () => {
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const minimalMI = {
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id: "mi-002",
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lineItem: "LETTER_PRINT_A5",
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timestamp: "2025-11-16T11:00:00.000Z",
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quantity: 75,
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supplierId: "supplier-101",
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createdAt: "2025-11-16T11:00:00.000Z",
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updatedAt: "2025-11-16T11:00:00.000Z",
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};
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const result = $MI.safeParse(minimalMI);
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expect(result.success).toBe(true);
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const data = result.data as MI;
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expect(data.specificationId).toBeUndefined();
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expect(data.groupId).toBeUndefined();
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expect(data.stockRemaining).toBeUndefined();
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});
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});
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describe("field validation", () => {
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it("should reject MI event missing required field 'id'", () => {
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const invalidMI = { ...validMIEvent };
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delete (invalidMI as any).id;
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event missing required field 'lineItem'", () => {
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const invalidMI = { ...validMIEvent };
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delete (invalidMI as any).lineItem;
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event missing required field 'timestamp'", () => {
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const invalidMI = { ...validMIEvent };
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delete (invalidMI as any).timestamp;
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event missing required field 'quantity'", () => {
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const invalidMI = { ...validMIEvent };
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delete (invalidMI as any).quantity;
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event missing required field 'supplierId'", () => {
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const invalidMI = { ...validMIEvent };
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delete (invalidMI as any).supplierId;
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event with invalid quantity type", () => {
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const invalidMI = {
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...validMIEvent,
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quantity: "not-a-number",
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};
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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it("should reject MI event with invalid stockRemaining type", () => {
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const invalidMI = {
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...validMIEvent,
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stockRemaining: "not-a-number",
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};
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const result = $MI.safeParse(invalidMI);
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expect(result.success).toBe(false);
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});
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});
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describe("testData examples", () => {
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it("should parse a letter print MI event", () => {
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const letterPrintMI = {
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id: "mi-letter-001",
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lineItem: "LETTER_PRINT_A4_COLOR",
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timestamp: "2025-11-16T14:00:00.000Z",
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quantity: 250,
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specificationId: "letter-spec-001",
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groupId: "batch-001",
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supplierId: "supplier-abc",
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createdAt: "2025-11-16T14:00:00.000Z",
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updatedAt: "2025-11-16T14:00:00.000Z",
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};
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const result = $MI.safeParse(letterPrintMI);
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expect(result.success).toBe(true);
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});
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it("should parse an envelope usage MI event", () => {
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const envelopeMI = {
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id: "mi-envelope-001",
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lineItem: "ENVELOPE_DL",
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timestamp: "2025-11-16T15:00:00.000Z",
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quantity: 300,
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stockRemaining: 2500,
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supplierId: "supplier-xyz",
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createdAt: "2025-11-16T15:00:00.000Z",
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updatedAt: "2025-11-16T15:00:00.000Z",
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};
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const result = $MI.safeParse(envelopeMI);
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expect(result.success).toBe(true);
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const data = result.data as MI;
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expect(data.stockRemaining).toBe(2500);
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});
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it("should parse a postage MI event", () => {
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const postageMI = {
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id: "mi-postage-001",
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lineItem: "POSTAGE_FIRST_CLASS",
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timestamp: "2025-11-16T16:00:00.000Z",
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quantity: 500,
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groupId: "daily-batch-16-11-2025",
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supplierId: "supplier-123",
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createdAt: "2025-11-16T16:00:00.000Z",
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updatedAt: "2025-11-16T16:00:00.000Z",
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};
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const result = $MI.safeParse(postageMI);
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expect(result.success).toBe(true);
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const data = result.data as MI;
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expect(data.lineItem).toBe("POSTAGE_FIRST_CLASS");
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expect(data.groupId).toBe("daily-batch-16-11-2025");
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});
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});
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});

‎internal/events/src/events/__tests__/mi-events.test.ts‎

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import fs from "node:fs";
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import path from "node:path";
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import { $MISubmittedEvent } from "@nhsdigital/nhs-notify-event-schemas-supplier-api/src/events/mi-events";
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function readJson(filename: string): unknown {
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const filePath = path.resolve(__dirname, "./testData/", filename);
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return JSON.parse(fs.readFileSync(filePath, "utf8"));
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}
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describe("MI event validations", () => {
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it("should parse mi.SUBMITTED event successfully", () => {
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const json = readJson("mi.SUBMITTED.json");
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const { data: event, error } = $MISubmittedEvent.safeParse(json);
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expect(error).toBeUndefined();
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expect(event).toBeDefined();
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expect(event).toEqual(
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expect.objectContaining({
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type: "uk.nhs.notify.supplier-api.mi.SUBMITTED.v1",
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specversion: "1.0",
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source: "/data-plane/supplier-api/prod/submit-mi",
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id: "8f2c3b44-4e65-5b1b-a678-1f0bf3d4d222",
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time: "2025-11-16T10:30:00.000Z",
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datacontenttype: "application/json",
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dataschema:
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"https://notify.nhs.uk/cloudevents/schemas/supplier-api/mi.SUBMITTED.1.0.0.schema.json",
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subject: "mi/mi-test-001",
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data: expect.objectContaining({
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id: "mi-test-001",
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lineItem: "LETTER_PRINT_A4",
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timestamp: "2025-11-16T10:30:00.000Z",
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quantity: 150,
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specificationId: "spec-123",
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groupId: "group-456",
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stockRemaining: 1000,
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supplierId: "supplier-789",
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}),
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}),
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);
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});
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it("should parse minimal mi.SUBMITTED event successfully", () => {
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const json = readJson("mi.SUBMITTED-minimal.json");
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const event = $MISubmittedEvent.parse(json);
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expect(event).toBeDefined();
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expect(event.data).toEqual(
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expect.objectContaining({
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id: "mi-envelope-001",
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lineItem: "ENVELOPE_DL",
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quantity: 300,
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stockRemaining: 2500,
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supplierId: "supplier-xyz",
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}),
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);
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expect(event.data.specificationId).toBeUndefined();
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expect(event.data.groupId).toBeUndefined();
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});
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it("should parse MI data fields correctly", () => {
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const json = readJson("mi.SUBMITTED.json");
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const event = $MISubmittedEvent.parse(json);
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expect(event).toBeDefined();
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expect(event.data.id).toBe("mi-test-001");
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expect(event.data.lineItem).toBe("LETTER_PRINT_A4");
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expect(event.data.quantity).toBe(150);
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expect(event.data.stockRemaining).toBe(1000);
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expect(event.data.supplierId).toBe("supplier-789");
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expect(event.data.specificationId).toBe("spec-123");
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expect(event.data.groupId).toBe("group-456");
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});
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it("should throw error for mi.SUBMITTED event with missing subject", () => {
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const json = readJson("mi.SUBMITTED-with-missing-subject.json");
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expect(() => $MISubmittedEvent.parse(json)).toThrow("subject");
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});
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it("should throw error for mi.SUBMITTED event with invalid major schema version", () => {
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const json = readJson("mi.SUBMITTED-with-invalid-major-version.json");
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expect(() => $MISubmittedEvent.parse(json)).toThrow("dataschema");
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});
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});

‎internal/events/src/events/__tests__/testData/mi.SUBMITTED-minimal.json‎

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{
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"data": {
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"createdAt": "2025-11-16T15:00:00.000Z",
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"id": "mi-envelope-001",
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"lineItem": "ENVELOPE_DL",
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"quantity": 300,
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"stockRemaining": 2500,
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"supplierId": "supplier-xyz",
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"timestamp": "2025-11-16T15:00:00.000Z",
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"updatedAt": "2025-11-16T15:00:00.000Z"
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},
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"datacontenttype": "application/json",
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"dataschema": "https://notify.nhs.uk/cloudevents/schemas/supplier-api/mi.SUBMITTED.1.0.0.schema.json",
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"id": "9a3d4c55-5f76-6c2c-b789-2f1cf4e5e333",
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"recordedtime": "2025-11-16T15:00:00.250Z",
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"severitynumber": 2,
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"severitytext": "INFO",
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"source": "/data-plane/supplier-api/prod/submit-mi",
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"specversion": "1.0",
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"subject": "mi/mi-envelope-001",
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"time": "2025-11-16T15:00:00.000Z",
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"traceparent": "00-2cf9873938ef65ff0660fd433e02541e-d9cf8d9380415553-01",
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"type": "uk.nhs.notify.supplier-api.mi.SUBMITTED.v1"
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}

‎internal/events/src/events/__tests__/testData/mi.SUBMITTED-with-invalid-major-version.json‎

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{
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"data": {
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"createdAt": "2025-11-16T10:30:00.000Z",
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"groupId": "group-456",
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"id": "mi-test-001",
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"lineItem": "LETTER_PRINT_A4",
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"quantity": 150,
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"specificationId": "spec-123",
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"stockRemaining": 1000,
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"supplierId": "supplier-789",
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"timestamp": "2025-11-16T10:30:00.000Z",
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"updatedAt": "2025-11-16T10:30:00.000Z"
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},
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"datacontenttype": "application/json",
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"dataschema": "https://notify.nhs.uk/cloudevents/schemas/supplier-api/mi.SUBMITTED.2.0.0.schema.json",
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"id": "8f2c3b44-4e65-5b1b-a678-1f0bf3d4d222",
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"recordedtime": "2025-11-16T10:30:00.250Z",
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"severitynumber": 2,
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"severitytext": "INFO",
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"source": "/data-plane/supplier-api/prod/submit-mi",
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"specversion": "1.0",
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"subject": "mi/mi-test-001",
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"time": "2025-11-16T10:30:00.000Z",
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"traceparent": "00-1bf8762827de54ee9559fc322d91430d-c8be7c8279304442-01",
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"type": "uk.nhs.notify.supplier-api.mi.SUBMITTED.v1"
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}

‎internal/events/src/events/__tests__/testData/mi.SUBMITTED-with-missing-subject.json‎

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{
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"data": {
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"createdAt": "2025-11-16T10:30:00.000Z",
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"id": "mi-invalid-001",
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"lineItem": "LETTER_PRINT_A4",
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"quantity": 150,
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"supplierId": "supplier-789",
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"timestamp": "2025-11-16T10:30:00.000Z",
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"updatedAt": "2025-11-16T10:30:00.000Z"
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},
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"datacontenttype": "application/json",
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"dataschema": "https://notify.nhs.uk/cloudevents/schemas/supplier-api/mi.SUBMITTED.1.0.0.schema.json",
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"id": "8f2c3b44-4e65-5b1b-a678-1f0bf3d4d222",
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"recordedtime": "2025-11-16T10:30:00.250Z",
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"severitynumber": 2,
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"severitytext": "INFO",
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"source": "/data-plane/supplier-api/prod/submit-mi",
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"specversion": "1.0",
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"time": "2025-11-16T10:30:00.000Z",
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"traceparent": "00-1bf8762827de54ee9559fc322d91430d-c8be7c8279304442-01",
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"type": "uk.nhs.notify.supplier-api.mi.SUBMITTED.v1"
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}

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