diff --git a/spec/utils.spec.ts b/spec/utils.spec.ts
new file mode 100644
index 00000000..7cf04143
--- /dev/null
+++ b/spec/utils.spec.ts
@@ -0,0 +1,122 @@
+import { compareVersions, formatString, getCommandLineArgs, getGuid, throttle } from '../src/common/utils';
+
+describe('utils', () => {
+    describe('`compareVersions`', () => {
+        it('should return -1 when v1 and v2 are invalid values', () => {
+            expect(compareVersions('1.0-1-1-', '2.1-1-1-')).toBe(-1);
+        });
+
+        it('should return -1 when v1 < v2', () => {
+            expect(compareVersions('v1.0', 'v2.1')).toBe(-1);
+        });
+
+        it('should return 1 when v1 > v2', () => {
+            expect(compareVersions('v1.8', 'v1.1')).toBe(1);
+        });
+
+        it('should return 0 when v1 is equal to v2', () => {
+            expect(compareVersions('v1.0', 'v1.0')).toBe(0);
+        });
+
+        describe('`compareVersions` using dash', () => {
+            it('should return 0 when v1 is equal to v2', () => {
+                expect(compareVersions('v1.0.8-beta1', 'v1.0.8-beta1')).toBe(0);
+            });
+
+            it('should return 1 when v1 is `string` and v2 is `number`', () => {
+                expect(compareVersions('v1.0.8-beta', 'v1.0.8-1')).toBe(1);
+            });
+
+            it('should return -1 when v1 is `number` and v2 is `string`', () => {
+                expect(compareVersions('v1.0.8-9', 'v1.0.8-beta')).toBe(-1);
+            });
+
+            it('should return -1 when v1 < v2', () => {
+                expect(compareVersions('v1.0.0-beta1', 'v1.0.0-beta2')).toBe(-1);
+            });
+
+            it('should return 1 when v1 > v2', () => {
+                expect(compareVersions('v1.0.0-beta5', 'v1.0.0-beta1')).toBe(1);
+            });
+
+             it('should return -1 when v1 is dashed and v2 is not', () => {
+                 expect(compareVersions('v1.0.0-beta5', 'v1.0.0')).toBe(-1);
+             });
+        });
+    });
+    describe('`getGuid`', () => {
+        it('should call `getGuid` correctly', () => {
+            const valueFirst = getGuid();
+            const valueSecond = getGuid();
+            expect(valueFirst).not.toEqual(valueSecond);
+        });
+
+        it('should return 4 dashes when `getGuid` is called', () => {
+            const dashCountGui = getGuid().split('-').length - 1;
+            expect(dashCountGui).toBe(4);
+        });
+
+        it('should return 36 length when `getGuid` is called', () => {
+            const lengthGui = getGuid().length;
+            expect(lengthGui).toBe(36);
+        });
+    });
+
+    describe('`getCommandLineArgs`', () => {
+        const argName = '--url=';
+        it('should call `getCommandLineArgs` correctly', () => {
+            const myCustomArgs = process.argv;
+            myCustomArgs.push(`--url='https://corporate.symphony.com'`);
+            const expectedValue = `--url='https://corporate.symphony.com'`;
+            expect(getCommandLineArgs(myCustomArgs, argName, false)).toBe(expectedValue);
+        });
+
+        it('should fail when the argv is invalid', () => {
+            const fakeValue: any = 'null';
+            const expectedValue = `get-command-line-args: TypeError invalid func arg, must be an array: ${fakeValue}`;
+            expect(() => {
+                getCommandLineArgs(fakeValue as string[], argName, false);
+            }).toThrow(expectedValue);
+        });
+    });
+
+    describe('`formatString', () => {
+        const str = 'this will log {time}';
+        const data = [{time: '1234'}];
+        it('should return `str` when data is empty', () => {
+            expect(formatString(str)).toEqual(str);
+        });
+
+        it('should replace key to dynamics values when `formatString` is used', () => {
+            const expectedValue = 'this will log 1234';
+            expect(formatString(str, data)).toBe(expectedValue);
+        });
+
+        it('should return `str` when `data` not match', () => {
+            const dataTest = [{test: 123}];
+            expect(formatString(str, dataTest)).toBe(str);
+        });
+    });
+
+    describe('`throttle`', () => {
+        beforeEach(() => {
+            jest.useFakeTimers();
+        });
+
+        it('should fail when wait is invalid', () => {
+            const functionMock = jest.fn();
+            const invalidTime = -1;
+            const expectedValue = `throttle: invalid throttleTime arg, must be a number: ${invalidTime}`;
+            expect(() => {
+                throttle(functionMock, invalidTime);
+            }).toThrow(expectedValue);
+        });
+
+        it('should call `throttle` correctly', () => {
+            const validTime = 3;
+            const tempFn = throttle(jest.fn(), validTime);
+            tempFn();
+            expect(setTimeout).toBeCalledWith(expect.any(Function), validTime);
+        });
+    });
+});
diff --git a/src/common/utils.ts b/src/common/utils.ts
index 5a102751..52276978 100644
--- a/src/common/utils.ts
+++ b/src/common/utils.ts
@@ -182,7 +182,7 @@ export const throttle = (func: (...args) => void, wait: number): (...args) => vo
  * @param data {Object} - Data to be added
  *
  * @example
- * StringFormat(this will log {time}`, { time: '1234' })
+ * StringFormat('this will log {time}', [{ time: '1234' }])
  *
  * result:
  * this will log 1234