Hexlet tests and linter status:

Data Validator (Education Project)

Java library that provides a validator object that checks the passed object according to the established rules and returns true or false. Validator can be used for String, Integer and Map objects.

Examples

StringSchema

import hexlet.code.Validator;
import hexlet.code.schemas.StringSchema;

Validator v = new Validator();

StringSchema schema = v.string();

schema.isValid(""); // true
schema.isValid(null); // true

schema.required();

schema.isValid("what does the fox say"); // true
schema.isValid("hexlet"); // true
schema.isValid(null); // false
schema.isValid(5); // false
schema.isValid(""); // false

schema.contains("wh").isValid("what does the fox say"); // true
schema.contains("what").isValid("what does the fox say"); // true
schema.contains("whatthe").isValid("what does the fox say"); // false

schema.isValid("what does the fox say"); // false

NumberSchema

import hexlet.code.Validator;
import hexlet.code.schemas.NumberSchema;

Validator v = new Validator();

NumberSchema schema = v.number();

schema.isValid(null); // true
schema.positive().isValid(null); // true

schema.required();

schema.isValid(null); // false
schema.isValid(10) // true
schema.isValid("5"); // false
schema.isValid(-10); // false
schema.isValid(0); // false

schema.range(5, 10);

schema.isValid(5); // true
schema.isValid(10); // true
schema.isValid(4); // false
schema.isValid(11); // false

MapSchema

import hexlet.code.Validator;
import hexlet.code.schemas.MapSchema;

Validator v = new Validator();

MapSchema schema = v.map();

schema.isValid(null); // true

schema.required();

schema.isValid(null); // false
schema.isValid(new HashMap()); // true
Map<String, String> data = new HashMap<>();
data.put("key1", "value1");
schema.isValid(data); // true

schema.sizeof(2);

schema.isValid(data);  // false
data.put("key2", "value2");
schema.isValid(data); // true