
        let invalid = Validator.validate(input: "p@ssword", rule: rule)
        XCTAssertFalse(invalid.isValid)
    }
    
    func test_validate_staticNumber_valid() {
        
        let rule = ValidationRuleEquality<Double>(target: 1.0, error: "💣")

        let valid = Validator.validate(input: 1.0, rule: rule)
        XCTAssertTrue(valid.isValid)
    }