diff --git a/spec/__mocks__/electron.ts b/spec/__mocks__/electron.ts
index 9c65c59c7..2d231defb 100644
--- a/spec/__mocks__/electron.ts
+++ b/spec/__mocks__/electron.ts
@@ -6,11 +6,13 @@ const mockIdleTime: number = 15;
 const appName: string = 'Symphony';
 const executableName: string = '/Symphony.exe';
 const isReady: boolean = true;
+const version: string = '4.0.0';
 interface IApp {
     getAppPath(): string;
     getPath(type: string): string;
     getName(): string;
     isReady(): boolean;
+    getVersion(): string;
 }
 interface IIpcMain {
     on(event: any, cb: any): void;
@@ -38,10 +40,14 @@ const app: IApp = {
         if (type === 'exe') {
             return path.join(pathToConfigDir(), executableName);
         }
+        if (type === 'userData') {
+            return path.join(pathToConfigDir(), '/../config');
+        }
         return pathToConfigDir();
     },
     getName: () => appName,
     isReady: () => isReady,
+    getVersion: () => version,
 };
 
 // simple ipc mocks for render and main process ipc using
diff --git a/spec/config.spec.ts b/spec/config.spec.ts
new file mode 100644
index 000000000..2556e6b88
--- /dev/null
+++ b/spec/config.spec.ts
@@ -0,0 +1,128 @@
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import { IConfig } from '../src/app/config-handler';
+
+describe('config', () => {
+    const configFileName: string = 'Symphony.config';
+    let userConfigDir: string;
+    let globalConfigDir: string;
+    let configInstance: any;
+
+    const createTempGlobalConfig = (fileName: string): string => {
+        const tmpDir = os.tmpdir();
+        return path.join(fs.mkdtempSync(path.join(tmpDir, 'config-')), fileName);
+    };
+
+    const createTempUserConfig = (fileName: string): string => {
+        const tmpDir = os.tmpdir();
+        return path.join(fs.mkdtempSync(path.join(tmpDir, 'user-')), fileName);
+    };
+
+    // write data in global config created
+    const writeConfigFile = (data: object): void => {
+        fs.writeFileSync(globalConfigDir, JSON.stringify(data));
+    };
+
+    // write data in user config created
+    const writeUserFile = (data: object): void => {
+        fs.writeFileSync(userConfigDir, JSON.stringify(data));
+    };
+
+    beforeEach(() => {
+        const { config } = require('../src/app/config-handler');
+
+        globalConfigDir = createTempGlobalConfig(configFileName);
+        userConfigDir = createTempUserConfig(configFileName);
+
+        configInstance = config;
+        jest.resetModules();
+    });
+
+    describe('getConfigFields', () => {
+        it('should fail when field not present in either user or global config', () => {
+            const fieldMock: string[] = ['no-url'];
+            const globalConfig: object = { url: 'test' };
+            const userConfig: object = { configVersion: '4.0.1' };
+
+            // creating temp file
+            writeConfigFile(globalConfig);
+            writeUserFile(userConfig);
+
+            // changing path from /Users/.../SymphonyElectron/config/Symphony.config to temp path
+            configInstance.globalConfigPath = globalConfigDir;
+            configInstance.userConfigPath = userConfigDir;
+            configInstance.readGlobalConfig();
+            configInstance.readUserConfig();
+
+            const configField: IConfig = configInstance.getConfigFields(fieldMock);
+            expect(configField).toEqual({});
+        });
+
+        it('should succeed when only present in user config', () => {
+            const fieldMock: string[] = ['url'];
+            const globalConfig: object = { url: 'something' };
+            const userConfig: object = { configVersion: '4.0.1' };
+
+            writeConfigFile(globalConfig);
+            writeUserFile(userConfig);
+
+            configInstance.globalConfigPath = globalConfigDir;
+            configInstance.userConfigPath = userConfigDir;
+
+            configInstance.readUserConfig();
+            configInstance.readGlobalConfig();
+
+            const configField: IConfig = configInstance.getConfigFields(fieldMock);
+
+            expect(configField.url).toBe('something');
+        });
+
+        it('should fail when config path is invalid', () => {
+            const userConfig: object = { url: 'test' };
+            let isInvalidPath: boolean = false;
+            writeConfigFile(userConfig);
+
+            configInstance.globalConfigPath = '//';
+            try {
+                configInstance.readGlobalConfig();
+            } catch (e) {
+                isInvalidPath = true;
+            }
+            expect(isInvalidPath).toBeTruthy();
+        });
+    });
+
+    describe('updateConfig', () => {
+        it('should overwrite existing field', () => {
+            const userConfig: object = { configVersion: '4.0.0' };
+            const overwriteUserConfig: object = { configVersion: '4.0.1' };
+            writeUserFile(userConfig);
+
+            configInstance.userConfigPath = userConfigDir;
+            configInstance.readUserConfig();
+
+            configInstance.updateUserConfig(overwriteUserConfig);
+            expect(configInstance.userConfig.configVersion).toBe('4.0.1');
+        });
+
+        it('should add new field', () => {
+            const userConfig: object = { configVersion: '4.0.0' };
+            const newValue: object = { test: 'test' };
+
+            writeUserFile(userConfig);
+
+            configInstance.userConfigPath = userConfigDir;
+            configInstance.readUserConfig();
+
+            configInstance.updateUserConfig(newValue);
+            expect(configInstance.userConfig).toEqual({ configVersion: '4.0.0', test: 'test' });
+        });
+
+        it('should fail when invalid path is used', () => {
+            configInstance.userConfigPath = '//';
+
+            return expect(configInstance.readUserConfig()).rejects.toBeTruthy();
+        });
+    });
+});