284 lines
16 KiB
Markdown
284 lines
16 KiB
Markdown
|
Webmozart Assert
|
||
|
|
================
|
||
|
|
|
||
|
|
[](https://travis-ci.org/webmozart/assert)
|
||
|
|
[](https://ci.appveyor.com/project/webmozart/assert/branch/master)
|
||
|
|
[](https://scrutinizer-ci.com/g/webmozart/assert/?branch=master)
|
||
|
|
[](https://packagist.org/packages/webmozart/assert)
|
||
|
|
[](https://packagist.org/packages/webmozart/assert)
|
||
|
|
|
||
|
|
This library contains efficient assertions to test the input and output of
|
||
|
|
your methods. With these assertions, you can greatly reduce the amount of coding
|
||
|
|
needed to write a safe implementation.
|
||
|
|
|
||
|
|
All assertions in the [`Assert`] class throw an `\InvalidArgumentException` if
|
||
|
|
they fail.
|
||
|
|
|
||
|
|
FAQ
|
||
|
|
---
|
||
|
|
|
||
|
|
**What's the difference to [beberlei/assert]?**
|
||
|
|
|
||
|
|
This library is heavily inspired by Benjamin Eberlei's wonderful [assert package],
|
||
|
|
but fixes a usability issue with error messages that can't be fixed there without
|
||
|
|
breaking backwards compatibility.
|
||
|
|
|
||
|
|
This package features usable error messages by default. However, you can also
|
||
|
|
easily write custom error messages:
|
||
|
|
|
||
|
|
```
|
||
|
|
Assert::string($path, 'The path is expected to be a string. Got: %s');
|
||
|
|
```
|
||
|
|
|
||
|
|
In [beberlei/assert], the ordering of the `%s` placeholders is different for
|
||
|
|
every assertion. This package, on the contrary, provides consistent placeholder
|
||
|
|
ordering for all assertions:
|
||
|
|
|
||
|
|
* `%s`: The tested value as string, e.g. `"/foo/bar"`.
|
||
|
|
* `%2$s`, `%3$s`, ...: Additional assertion-specific values, e.g. the
|
||
|
|
minimum/maximum length, allowed values, etc.
|
||
|
|
|
||
|
|
Check the source code of the assertions to find out details about the additional
|
||
|
|
available placeholders.
|
||
|
|
|
||
|
|
Installation
|
||
|
|
------------
|
||
|
|
|
||
|
|
Use [Composer] to install the package:
|
||
|
|
|
||
|
|
```
|
||
|
|
$ composer require webmozart/assert
|
||
|
|
```
|
||
|
|
|
||
|
|
Example
|
||
|
|
-------
|
||
|
|
|
||
|
|
```php
|
||
|
|
use Webmozart\Assert\Assert;
|
||
|
|
|
||
|
|
class Employee
|
||
|
|
{
|
||
|
|
public function __construct($id)
|
||
|
|
{
|
||
|
|
Assert::integer($id, 'The employee ID must be an integer. Got: %s');
|
||
|
|
Assert::greaterThan($id, 0, 'The employee ID must be a positive integer. Got: %s');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
If you create an employee with an invalid ID, an exception is thrown:
|
||
|
|
|
||
|
|
```php
|
||
|
|
new Employee('foobar');
|
||
|
|
// => InvalidArgumentException:
|
||
|
|
// The employee ID must be an integer. Got: string
|
||
|
|
|
||
|
|
new Employee(-10);
|
||
|
|
// => InvalidArgumentException:
|
||
|
|
// The employee ID must be a positive integer. Got: -10
|
||
|
|
```
|
||
|
|
|
||
|
|
Assertions
|
||
|
|
----------
|
||
|
|
|
||
|
|
The [`Assert`] class provides the following assertions:
|
||
|
|
|
||
|
|
### Type Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
-------------------------------------------------------- | --------------------------------------------------
|
||
|
|
`string($value, $message = '')` | Check that a value is a string
|
||
|
|
`stringNotEmpty($value, $message = '')` | Check that a value is a non-empty string
|
||
|
|
`integer($value, $message = '')` | Check that a value is an integer
|
||
|
|
`integerish($value, $message = '')` | Check that a value casts to an integer
|
||
|
|
`float($value, $message = '')` | Check that a value is a float
|
||
|
|
`numeric($value, $message = '')` | Check that a value is numeric
|
||
|
|
`natural($value, $message= ''')` | Check that a value is a non-negative integer
|
||
|
|
`boolean($value, $message = '')` | Check that a value is a boolean
|
||
|
|
`scalar($value, $message = '')` | Check that a value is a scalar
|
||
|
|
`object($value, $message = '')` | Check that a value is an object
|
||
|
|
`resource($value, $type = null, $message = '')` | Check that a value is a resource
|
||
|
|
`isCallable($value, $message = '')` | Check that a value is a callable
|
||
|
|
`isArray($value, $message = '')` | Check that a value is an array
|
||
|
|
`isTraversable($value, $message = '')` (deprecated) | Check that a value is an array or a `\Traversable`
|
||
|
|
`isIterable($value, $message = '')` | Check that a value is an array or a `\Traversable`
|
||
|
|
`isCountable($value, $message = '')` | Check that a value is an array or a `\Countable`
|
||
|
|
`isInstanceOf($value, $class, $message = '')` | Check that a value is an `instanceof` a class
|
||
|
|
`isInstanceOfAny($value, array $classes, $message = '')` | Check that a value is an `instanceof` at least one class on the array of classes
|
||
|
|
`notInstanceOf($value, $class, $message = '')` | Check that a value is not an `instanceof` a class
|
||
|
|
`isAOf($value, $class, $message = '')` | Check that a value is of the class or has one of its parents
|
||
|
|
`isAnyOf($value, array $classes, $message = '')` | Check that a value is of at least one of the classes or has one of its parents
|
||
|
|
`isNotA($value, $class, $message = '')` | Check that a value is not of the class or has not one of its parents
|
||
|
|
`isArrayAccessible($value, $message = '')` | Check that a value can be accessed as an array
|
||
|
|
`uniqueValues($values, $message = '')` | Check that the given array contains unique values
|
||
|
|
|
||
|
|
### Comparison Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
----------------------------------------------- | ------------------------------------------------------------------
|
||
|
|
`true($value, $message = '')` | Check that a value is `true`
|
||
|
|
`false($value, $message = '')` | Check that a value is `false`
|
||
|
|
`notFalse($value, $message = '')` | Check that a value is not `false`
|
||
|
|
`null($value, $message = '')` | Check that a value is `null`
|
||
|
|
`notNull($value, $message = '')` | Check that a value is not `null`
|
||
|
|
`isEmpty($value, $message = '')` | Check that a value is `empty()`
|
||
|
|
`notEmpty($value, $message = '')` | Check that a value is not `empty()`
|
||
|
|
`eq($value, $value2, $message = '')` | Check that a value equals another (`==`)
|
||
|
|
`notEq($value, $value2, $message = '')` | Check that a value does not equal another (`!=`)
|
||
|
|
`same($value, $value2, $message = '')` | Check that a value is identical to another (`===`)
|
||
|
|
`notSame($value, $value2, $message = '')` | Check that a value is not identical to another (`!==`)
|
||
|
|
`greaterThan($value, $value2, $message = '')` | Check that a value is greater than another
|
||
|
|
`greaterThanEq($value, $value2, $message = '')` | Check that a value is greater than or equal to another
|
||
|
|
`lessThan($value, $value2, $message = '')` | Check that a value is less than another
|
||
|
|
`lessThanEq($value, $value2, $message = '')` | Check that a value is less than or equal to another
|
||
|
|
`range($value, $min, $max, $message = '')` | Check that a value is within a range
|
||
|
|
`inArray($value, array $values, $message = '')` | Check that a value is one of a list of values
|
||
|
|
`oneOf($value, array $values, $message = '')` | Check that a value is one of a list of values (alias of `inArray`)
|
||
|
|
|
||
|
|
### String Assertions
|
||
|
|
|
||
|
|
You should check that a value is a string with `Assert::string()` before making
|
||
|
|
any of the following assertions.
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
--------------------------------------------------- | -----------------------------------------------------------------
|
||
|
|
`contains($value, $subString, $message = '')` | Check that a string contains a substring
|
||
|
|
`notContains($value, $subString, $message = '')` | Check that a string does not contain a substring
|
||
|
|
`startsWith($value, $prefix, $message = '')` | Check that a string has a prefix
|
||
|
|
`notStartsWith($value, $prefix, $message = '')` | Check that a string does not have a prefix
|
||
|
|
`startsWithLetter($value, $message = '')` | Check that a string starts with a letter
|
||
|
|
`endsWith($value, $suffix, $message = '')` | Check that a string has a suffix
|
||
|
|
`notEndsWith($value, $suffix, $message = '')` | Check that a string does not have a suffix
|
||
|
|
`regex($value, $pattern, $message = '')` | Check that a string matches a regular expression
|
||
|
|
`notRegex($value, $pattern, $message = '')` | Check that a string does not match a regular expression
|
||
|
|
`unicodeLetters($value, $message = '')` | Check that a string contains Unicode letters only
|
||
|
|
`alpha($value, $message = '')` | Check that a string contains letters only
|
||
|
|
`digits($value, $message = '')` | Check that a string contains digits only
|
||
|
|
`alnum($value, $message = '')` | Check that a string contains letters and digits only
|
||
|
|
`lower($value, $message = '')` | Check that a string contains lowercase characters only
|
||
|
|
`upper($value, $message = '')` | Check that a string contains uppercase characters only
|
||
|
|
`length($value, $length, $message = '')` | Check that a string has a certain number of characters
|
||
|
|
`minLength($value, $min, $message = '')` | Check that a string has at least a certain number of characters
|
||
|
|
`maxLength($value, $max, $message = '')` | Check that a string has at most a certain number of characters
|
||
|
|
`lengthBetween($value, $min, $max, $message = '')` | Check that a string has a length in the given range
|
||
|
|
`uuid($value, $message = '')` | Check that a string is a valid UUID
|
||
|
|
`ip($value, $message = '')` | Check that a string is a valid IP (either IPv4 or IPv6)
|
||
|
|
`ipv4($value, $message = '')` | Check that a string is a valid IPv4
|
||
|
|
`ipv6($value, $message = '')` | Check that a string is a valid IPv6
|
||
|
|
`email($value, $message = '')` | Check that a string is a valid e-mail address
|
||
|
|
`notWhitespaceOnly($value, $message = '')` | Check that a string contains at least one non-whitespace character
|
||
|
|
|
||
|
|
### File Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
----------------------------------- | --------------------------------------------------
|
||
|
|
`fileExists($value, $message = '')` | Check that a value is an existing path
|
||
|
|
`file($value, $message = '')` | Check that a value is an existing file
|
||
|
|
`directory($value, $message = '')` | Check that a value is an existing directory
|
||
|
|
`readable($value, $message = '')` | Check that a value is a readable path
|
||
|
|
`writable($value, $message = '')` | Check that a value is a writable path
|
||
|
|
|
||
|
|
### Object Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
----------------------------------------------------- | --------------------------------------------------
|
||
|
|
`classExists($value, $message = '')` | Check that a value is an existing class name
|
||
|
|
`subclassOf($value, $class, $message = '')` | Check that a class is a subclass of another
|
||
|
|
`interfaceExists($value, $message = '')` | Check that a value is an existing interface name
|
||
|
|
`implementsInterface($value, $class, $message = '')` | Check that a class implements an interface
|
||
|
|
`propertyExists($value, $property, $message = '')` | Check that a property exists in a class/object
|
||
|
|
`propertyNotExists($value, $property, $message = '')` | Check that a property does not exist in a class/object
|
||
|
|
`methodExists($value, $method, $message = '')` | Check that a method exists in a class/object
|
||
|
|
`methodNotExists($value, $method, $message = '')` | Check that a method does not exist in a class/object
|
||
|
|
|
||
|
|
### Array Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
-------------------------------------------------- | ------------------------------------------------------------------
|
||
|
|
`keyExists($array, $key, $message = '')` | Check that a key exists in an array
|
||
|
|
`keyNotExists($array, $key, $message = '')` | Check that a key does not exist in an array
|
||
|
|
`validArrayKey($key, $message = '')` | Check that a value is a valid array key (int or string)
|
||
|
|
`count($array, $number, $message = '')` | Check that an array contains a specific number of elements
|
||
|
|
`minCount($array, $min, $message = '')` | Check that an array contains at least a certain number of elements
|
||
|
|
`maxCount($array, $max, $message = '')` | Check that an array contains at most a certain number of elements
|
||
|
|
`countBetween($array, $min, $max, $message = '')` | Check that an array has a count in the given range
|
||
|
|
`isList($array, $message = '')` | Check that an array is a non-associative list
|
||
|
|
`isNonEmptyList($array, $message = '')` | Check that an array is a non-associative list, and not empty
|
||
|
|
`isMap($array, $message = '')` | Check that an array is associative and has strings as keys
|
||
|
|
`isNonEmptyMap($array, $message = '')` | Check that an array is associative and has strings as keys, and is not empty
|
||
|
|
|
||
|
|
### Function Assertions
|
||
|
|
|
||
|
|
Method | Description
|
||
|
|
------------------------------------------- | -----------------------------------------------------------------------------------------------------
|
||
|
|
`throws($closure, $class, $message = '')` | Check that a function throws a certain exception. Subclasses of the exception class will be accepted.
|
||
|
|
|
||
|
|
### Collection Assertions
|
||
|
|
|
||
|
|
All of the above assertions can be prefixed with `all*()` to test the contents
|
||
|
|
of an array or a `\Traversable`:
|
||
|
|
|
||
|
|
```php
|
||
|
|
Assert::allIsInstanceOf($employees, 'Acme\Employee');
|
||
|
|
```
|
||
|
|
|
||
|
|
### Nullable Assertions
|
||
|
|
|
||
|
|
All of the above assertions can be prefixed with `nullOr*()` to run the
|
||
|
|
assertion only if it the value is not `null`:
|
||
|
|
|
||
|
|
```php
|
||
|
|
Assert::nullOrString($middleName, 'The middle name must be a string or null. Got: %s');
|
||
|
|
```
|
||
|
|
|
||
|
|
### Extending Assert
|
||
|
|
|
||
|
|
The `Assert` class comes with a few methods, which can be overridden to change the class behaviour. You can also extend it to
|
||
|
|
add your own assertions.
|
||
|
|
|
||
|
|
#### Overriding methods
|
||
|
|
|
||
|
|
Overriding the following methods in your assertion class allows you to change the behaviour of the assertions:
|
||
|
|
|
||
|
|
* `public static function __callStatic($name, $arguments)`
|
||
|
|
* This method is used to 'create' the `nullOr` and `all` versions of the assertions.
|
||
|
|
* `protected static function valueToString($value)`
|
||
|
|
* This method is used for error messages, to convert the value to a string value for displaying. You could use this for representing a value object with a `__toString` method for example.
|
||
|
|
* `protected static function typeToString($value)`
|
||
|
|
* This method is used for error messages, to convert the a value to a string representing its type.
|
||
|
|
* `protected static function strlen($value)`
|
||
|
|
* This method is used to calculate string length for relevant methods, using the `mb_strlen` if available and useful.
|
||
|
|
* `protected static function reportInvalidArgument($message)`
|
||
|
|
* This method is called when an assertion fails, with the specified error message. Here you can throw your own exception, or log something.
|
||
|
|
|
||
|
|
|
||
|
|
Authors
|
||
|
|
-------
|
||
|
|
|
||
|
|
* [Bernhard Schussek] a.k.a. [@webmozart]
|
||
|
|
* [The Community Contributors]
|
||
|
|
|
||
|
|
Contribute
|
||
|
|
----------
|
||
|
|
|
||
|
|
Contributions to the package are always welcome!
|
||
|
|
|
||
|
|
* Report any bugs or issues you find on the [issue tracker].
|
||
|
|
* You can grab the source code at the package's [Git repository].
|
||
|
|
|
||
|
|
License
|
||
|
|
-------
|
||
|
|
|
||
|
|
All contents of this package are licensed under the [MIT license].
|
||
|
|
|
||
|
|
[beberlei/assert]: https://github.com/beberlei/assert
|
||
|
|
[assert package]: https://github.com/beberlei/assert
|
||
|
|
[Composer]: https://getcomposer.org
|
||
|
|
[Bernhard Schussek]: https://webmozarts.com
|
||
|
|
[The Community Contributors]: https://github.com/webmozart/assert/graphs/contributors
|
||
|
|
[issue tracker]: https://github.com/webmozart/assert/issues
|
||
|
|
[Git repository]: https://github.com/webmozart/assert
|
||
|
|
[@webmozart]: https://twitter.com/webmozart
|
||
|
|
[MIT license]: LICENSE
|
||
|
|
[`Assert`]: src/Assert.php
|