Merge pull request #10 from fullstacksjs/feat/regex-validation

feat: regex validation

src/Schema/StringSchema.spec.ts

@@ -79,4 +79,15 @@ describe('String Schema', () => {
 
     expect(() => schema.validate()).not.toThrow();
   });
+
+  it('should throw when regex does not match', () => {
+    const schema = new StringSchema().regex(/\d+/).setValue('a');
+    schema.key = 'port';
+
+    expect(() => schema.validate()).toThrow(
+      new TypeError(
+        `Invalid configuration: The "port" expected to follow "${String(/\d+/)}" regex but received "a"`,
+      ),
+    );
+  });
 });

src/Schema/StringSchema.ts

@@ -25,6 +25,17 @@ class MaxLengthGuard implements Guard<string> {
   }
 }
 
+class RegExGuard implements Guard<string> {
+  constructor(private regex: RegExp) {}
+
+  validate(input: string, field: string) {
+    if (!this.regex.test(input))
+      throw new RangeError(
+        `Invalid configuration: The "${field}" expected to follow "${this.regex}" regex but received "${input}"`,
+      );
+  }
+}
+
 export class StringSchema<TInput = any> extends Schema<TInput, string> {
   protected type = 'string';
 
@@ -45,4 +56,9 @@ export class StringSchema<TInput = any> extends Schema<TInput, string> {
     this.guards.push(new MaxLengthGuard(max));
     return this;
   }
+
+  public regex(regex: RegExp) {
+    this.guards.push(new RegExGuard(regex));
+    return this;
+  }
 }