docs: more explicit description for isPositive/isNegative valida… (#581)

Author: evolkmann

README.md

@@ -819,8 +819,8 @@ isBoolean(value);
 | `@IsEnum(entity: object)`                         | Checks if the value is an valid enum                                                                                           |
 | **Number validation decorators**                                                                                                                                                   |
 | `@IsDivisibleBy(num: number)`                   | Checks if the value is a number that's divisible by another.                                                                     |
-| `@IsPositive()`                                 | Checks if the value is a positive number.                                                                                        |
-| `@IsNegative()`                                 | Checks if the value is a negative number.                                                                                        |
+| `@IsPositive()`                                 | Checks if the value is a positive number greater than zero.                                                                                        |
+| `@IsNegative()`                                 | Checks if the value is a negative number smaller than zero.                                                                                        |
 | `@Min(min: number)`                             | Checks if the given number is greater than or equal to given number.                                                             |
 | `@Max(max: number)`                             | Checks if the given number is less than or equal to given number.                                                                |
 | **Date validation decorators**                                                                                                                                                     |

src/decorator/number/IsNegative.ts

@@ -4,14 +4,14 @@ import { buildMessage, ValidateBy } from "../common/ValidateBy";
 export const IS_NEGATIVE = "isNegative";
 
 /**
- * Checks if the value is a negative number.
+ * Checks if the value is a negative number smaller than zero.
  */
 export function isNegative(value: unknown): boolean {
     return typeof value === "number" && value < 0;
 }
 
 /**
- * Checks if the value is a negative number.
+ * Checks if the value is a negative number smaller than zero.
  */
 export function IsNegative(validationOptions?: ValidationOptions): PropertyDecorator {
     return ValidateBy(

src/decorator/number/IsPositive.ts

@@ -4,14 +4,14 @@ import { buildMessage, ValidateBy } from "../common/ValidateBy";
 export const IS_POSITIVE = "isPositive";
 
 /**
- * Checks if the value is a positive number.
+ * Checks if the value is a positive number greater than zero.
  */
 export function isPositive(value: unknown): boolean {
     return typeof value === "number" && value > 0;
 }
 
 /**
- * Checks if the value is a positive number.
+ * Checks if the value is a positive number greater than zero.
  */
 export function IsPositive(validationOptions?: ValidationOptions): PropertyDecorator {
     return ValidateBy(