test: add unit test verifying the whoami endpoint will be called only once per process

Author: Fatme

test/services/ip-service.ts

@@ -135,5 +135,25 @@ describe("ipService", () => {
 			assert.isTrue(logger.traceOutput.indexOf(errMsgForMyipCom) !== -1, `Trace output\n'${logger.traceOutput}'\ndoes not contain expected message:\n${errMsgForMyipCom}`);
 			assert.isTrue(logger.traceOutput.indexOf(errMsgForIpifyOrg) !== -1, `Trace output\n'${logger.traceOutput}'\ndoes not contain expected message:\n${errMsgForMyipCom}`);
 		});
+
+		it("is called only once per process", async () => {
+			const testInjector = createTestInjector();
+			const httpClient = testInjector.resolve<Server.IHttpClient>("httpClient");
+			let httpRequestCounter = 0;
+			httpClient.httpRequest = async (options: any, proxySettings?: IProxySettings): Promise<Server.IResponse> => {
+				httpRequestCounter++;
+				return <any>{ body: JSON.stringify({ ip }) };
+			};
+
+			const ipService = testInjector.resolve<IIPService>("ipService");
+
+			const ipAddress = await ipService.getCurrentIPv4Address();
+			assert.equal(httpRequestCounter, 1);
+			assert.equal(ipAddress, ip);
+
+			const ipAddress2 = await ipService.getCurrentIPv4Address();
+			assert.equal(httpRequestCounter, 1);
+			assert.equal(ipAddress2, ip);
+		});
 	});
 });