fix: add tests for enums

tests/TimeSpanIncrement.spec.ts

@@ -0,0 +1,53 @@
+import { TimeSpanIncrement } from '../src/enums/TimeSpanIncrement';
+import { expect } from 'chai';
+
+describe('TimeSpanIncrement', function () {
+  describe('Seconds', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Seconds;
+      expect(result).to.equal('Seconds');
+    });
+  });
+
+  describe('Minutes', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Minutes;
+      expect(result).to.equal('Minutes');
+    });
+  });
+
+  describe('Hours', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Hours;
+      expect(result).to.equal('Hours');
+    });
+  });
+
+  describe('Days', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Days;
+      expect(result).to.equal('Days');
+    });
+  });
+
+  describe('Weeks', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Weeks;
+      expect(result).to.equal('Weeks');
+    });
+  });
+
+  describe('Months', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Months;
+      expect(result).to.equal('Months');
+    });
+  });
+
+  describe('Years', function () {
+    it('should return the correct value', function () {
+      const result = TimeSpanIncrement.Years;
+      expect(result).to.equal('Years');
+    });
+  });
+});