Merge pull request #1 from zwenza/feature/djoech/added-number-validator

added number validator

Author: dsumer

.eslintrc.js

@@ -27,7 +27,7 @@ module.exports = {
         'dot-location': [ERROR, 'property'],
         'dot-notation': ERROR,
         'eqeqeq': [ERROR, 'allow-null'],
-        'indent': [ERROR, 4],
+        'indent': [ERROR, 4, {"SwitchCase": 1}],
         'jsx-quotes': [ERROR, 'prefer-double'],
         'keyword-spacing': [ERROR, {after: true, before: true}],
         'no-bitwise': OFF,

src/validationRules.js

@@ -28,6 +28,16 @@ const rules = {
             }
         }
         return allValid;
+    },
+    isNumber: (values, value) => {
+        switch (typeof value) {
+            case 'string': 
+                return rules.matchRegexp(values, value, /^-?\d+\.?\d*$/);
+            case 'number': 
+                return true;
+            default: 
+                return false;
+        }
     }
 };
 // TODO: add more basic rules

tests/validationRules.spec.js

@@ -104,5 +104,56 @@ describe('Validation Rules', () => {
             let valid = rules.minLength(null, 'abcde', 6);
             expect(valid).toBe(false);
         });
-    })
+    });
+
+    describe('number', () => {
+        it('should validate a whole number strings successfully', () => {
+            let valid = rules.isNumber(null, '10');
+            expect(valid).toBe(true);
+        });
+        it('should validate a negative number strings successfully', () => {
+            let valid = rules.isNumber(null, '-50');
+            expect(valid).toBe(true);
+        });
+        it('should validate a decimal number strings successfully', () => {
+            let valid = rules.isNumber(null, '10.50');
+            expect(valid).toBe(true);
+        });
+        it('should invalidate the invalid number strings', () => {
+            let valid = rules.isNumber(null, '1A0');
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, '');
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, 'abcde');
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, '10.a1');
+            expect(valid).toBe(false);
+        });
+        it('should validate a whole number successfully', () => {
+            let valid = rules.isNumber(null, 10);
+            expect(valid).toBe(true);
+        });
+        it('should validate a negative number successfully', () => {
+            let valid = rules.isNumber(null, -50);
+            expect(valid).toBe(true);
+        });
+        it('should validate a decimal number successfully', () => {
+            let valid = rules.isNumber(null, 10.50);
+            expect(valid).toBe(true);
+        });
+        it('should invalidate the invalid numbers', () => {
+            let valid = rules.isNumber(null, {});
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, '');
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, null);
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, undefined);
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, true);
+            expect(valid).toBe(false);
+            valid = rules.isNumber(null, () => {});
+            expect(valid).toBe(false);
+        });
+    });
 });