[PM-5972] add subaddress generator strategy (#7897)

libs/common/src/tools/generator/username/subaddress-generator-strategy.spec.ts

@@ -0,0 +1,83 @@
+import { mock } from "jest-mock-extended";
+
+import { PolicyType } from "../../../admin-console/enums";
+// FIXME: use index.ts imports once policy abstractions and models
+// implement ADR-0002
+import { Policy } from "../../../admin-console/models/domain/policy";
+import { DefaultPolicyEvaluator } from "../default-policy-evaluator";
+import { SUBADDRESS_SETTINGS } from "../key-definitions";
+
+import { SubaddressGeneratorStrategy, UsernameGenerationServiceAbstraction } from ".";
+
+describe("Email subaddress list generation strategy", () => {
+  describe("evaluator()", () => {
+    it("should throw if the policy type is incorrect", () => {
+      const strategy = new SubaddressGeneratorStrategy(null);
+      const policy = mock<Policy>({
+        type: PolicyType.DisableSend,
+      });
+
+      expect(() => strategy.evaluator(policy)).toThrow(new RegExp("Mismatched policy type\\. .+"));
+    });
+
+    it("should map to the policy evaluator", () => {
+      const strategy = new SubaddressGeneratorStrategy(null);
+      const policy = mock<Policy>({
+        type: PolicyType.PasswordGenerator,
+        data: {
+          minLength: 10,
+        },
+      });
+
+      const evaluator = strategy.evaluator(policy);
+
+      expect(evaluator).toBeInstanceOf(DefaultPolicyEvaluator);
+      expect(evaluator.policy).toMatchObject({});
+    });
+  });
+
+  describe("disk", () => {
+    it("should use password settings key", () => {
+      const legacy = mock<UsernameGenerationServiceAbstraction>();
+      const strategy = new SubaddressGeneratorStrategy(legacy);
+
+      expect(strategy.disk).toBe(SUBADDRESS_SETTINGS);
+    });
+  });
+
+  describe("cache_ms", () => {
+    it("should be a positive non-zero number", () => {
+      const legacy = mock<UsernameGenerationServiceAbstraction>();
+      const strategy = new SubaddressGeneratorStrategy(legacy);
+
+      expect(strategy.cache_ms).toBeGreaterThan(0);
+    });
+  });
+
+  describe("policy", () => {
+    it("should use password generator policy", () => {
+      const legacy = mock<UsernameGenerationServiceAbstraction>();
+      const strategy = new SubaddressGeneratorStrategy(legacy);
+
+      expect(strategy.policy).toBe(PolicyType.PasswordGenerator);
+    });
+  });
+
+  describe("generate()", () => {
+    it("should call the legacy service with the given options", async () => {
+      const legacy = mock<UsernameGenerationServiceAbstraction>();
+      const strategy = new SubaddressGeneratorStrategy(legacy);
+      const options = {
+        type: "website-name" as const,
+        email: "someone@example.com",
+      };
+
+      await strategy.generate(options);
+
+      expect(legacy.generateSubaddress).toHaveBeenCalledWith({
+        subaddressType: "website-name" as const,
+        subaddressEmail: "someone@example.com",
+      });
+    });
+  });
+});