test(config): add unit testing

test: add unhappy path

packages/system-api/jest.config.cjs

@@ -7,7 +7,7 @@ module.exports = {
   setupFiles: ['<rootDir>/src/test/dotenv-config.ts'],
   setupFilesAfterEnv: ['<rootDir>/src/test/jest-setup.ts'],
   collectCoverage: true,
-  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/**/migrations/**/*.{ts,tsx}', '!**/config/**/*.{ts,tsx}', '!**/__tests__/**'],
+  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/**/migrations/**/*.{ts,tsx}', '!**/src/config/**/*.{ts,tsx}', '!**/__tests__/**'],
   passWithNoTests: true,
   transform: {
     '^.+\\.graphql$': 'graphql-import-node/jest',

packages/system-api/src/core/config/__tests__/TipiConfig.test.ts

@@ -0,0 +1,83 @@
+import { faker } from '@faker-js/faker';
+import fs from 'fs-extra';
+import { applyJsonConfig, getConfig, setConfig } from '../TipiConfig';
+
+jest.mock('fs-extra');
+
+beforeEach(async () => {
+  jest.resetModules();
+  jest.resetAllMocks();
+});
+
+describe('Test: getConfig', () => {
+  it('It should return config from .env', () => {
+    const config = getConfig();
+
+    expect(config).toBeDefined();
+    expect(config.NODE_ENV).toBe('test');
+    expect(config.logs.LOGS_FOLDER).toBe('logs');
+    expect(config.logs.LOGS_APP).toBe('app.log');
+    expect(config.logs.LOGS_ERROR).toBe('error.log');
+    expect(config.dnsIp).toBe('9.9.9.9');
+    expect(config.rootFolder).toBe('/runtipi');
+    expect(config.internalIp).toBe('192.168.1.10');
+  });
+});
+
+describe('Test: setConfig', () => {
+  it('It should be able set config', () => {
+    const randomWord = faker.random.word();
+    setConfig('appsRepoUrl', randomWord);
+    const config = getConfig();
+
+    expect(config).toBeDefined();
+    expect(config.appsRepoUrl).toBe(randomWord);
+  });
+
+  it('Should not be able to set invalid NODE_ENV', () => {
+    expect(() => setConfig('NODE_ENV', 'invalid')).toThrow();
+  });
+});
+
+describe('Test: applyJsonConfig', () => {
+  it('It should be able to apply json config', () => {
+    const settingsJson = {
+      appsRepoUrl: faker.random.word(),
+      appsRepoId: faker.random.word(),
+      domain: faker.random.word(),
+    };
+
+    const MockFiles = {
+      '/runtipi/state/settings.json': JSON.stringify(settingsJson),
+    };
+
+    // @ts-ignore
+    fs.__createMockFiles(MockFiles);
+
+    applyJsonConfig();
+    const config = getConfig();
+
+    expect(config).toBeDefined();
+
+    expect(config.appsRepoUrl).toBe(settingsJson.appsRepoUrl);
+    expect(config.appsRepoId).toBe(settingsJson.appsRepoId);
+    expect(config.domain).toBe(settingsJson.domain);
+  });
+
+  it('Should not be able to apply an invalid value from json config', () => {
+    const settingsJson = {
+      appsRepoUrl: faker.random.word(),
+      appsRepoId: faker.random.word(),
+      domain: 10,
+    };
+
+    const MockFiles = {
+      '/runtipi/state/settings.json': JSON.stringify(settingsJson),
+    };
+
+    // @ts-ignore
+    fs.__createMockFiles(MockFiles);
+
+    expect(() => applyJsonConfig()).toThrow();
+  });
+});