fix: add Unit Tests for Api-Server configuration testing

Unit tests for testing default config behaviour + user-defined
configuration for shutdown hook

Closes: hyperledger-cacti#1619
Signed-off-by: Michael Courtin <michael.courtin@accenture.com>

packages/cactus-cmd-api-server/src/test/typescript/unit/config/api-server-config.test.ts

@@ -0,0 +1,84 @@
+import "jest-extended";
+import {
+  ApiServer,
+  // AuthorizationProtocol,
+  ConfigService,
+} from "../../../../main/typescript/public-api";
+
+describe("api-server shutdown-hook configuration tests", () => {
+  // create a config service as base for the following UTs
+  const configService = new ConfigService();
+
+  it("enables the shutdown hook based on schema-default", async () => {
+    const expectedResult = true;
+    const apiServerOptions = await configService.newExampleConfig();
+    const config = await configService.newExampleConfigConvict(
+      apiServerOptions,
+    );
+
+    const apiServer = new ApiServer({
+      config: config.getProperties(),
+    });
+
+    // check apiServerOptions
+    expect(apiServerOptions).not.toBeUndefined();
+    expect(apiServerOptions.enableShutdownHook).toBe(expectedResult);
+
+    // check apiServer
+    expect(apiServer).toBeTruthy();
+    const result = apiServer["enableShutdownHook"];
+    expect(result).toBe(expectedResult);
+  });
+
+  it("disables the shutdown hook based on the config value set to false", async () => {
+    const expectedResult = false;
+    const apiServerOptions = await configService.newExampleConfig();
+
+    // disable shutdown hook
+    apiServerOptions.enableShutdownHook = false;
+
+    const config = await configService.newExampleConfigConvict(
+      apiServerOptions,
+      true,
+    );
+
+    const apiServer = new ApiServer({
+      config: config.getProperties(),
+    });
+
+    // check apiServerOptions
+    expect(apiServerOptions).not.toBeUndefined();
+    expect(apiServerOptions.enableShutdownHook).toBe(expectedResult);
+
+    // check apiServer
+    expect(apiServer).toBeTruthy();
+    const result = apiServer["enableShutdownHook"];
+    expect(result).toBe(expectedResult);
+  });
+
+  it("enables the shutdown hook based on the config value set to true", async () => {
+    const expectedResult = true;
+    const apiServerOptions = await configService.newExampleConfig();
+
+    // disable shutdown hook
+    apiServerOptions.enableShutdownHook = true;
+
+    const config = await configService.newExampleConfigConvict(
+      apiServerOptions,
+      true,
+    );
+
+    const apiServer = new ApiServer({
+      config: config.getProperties(),
+    });
+
+    // check apiServerOptions
+    expect(apiServerOptions).not.toBeUndefined();
+    expect(apiServerOptions.enableShutdownHook).toBe(expectedResult);
+
+    // check apiServer
+    expect(apiServer).toBeTruthy();
+    const result = apiServer["enableShutdownHook"];
+    expect(result).toBe(expectedResult);
+  });
+});