Sen descrición

This is the PHP port of Hamcrest Matchers

Hamcrest is a matching library originally written for Java, but subsequently ported to many other languages. hamcrest-php is the official PHP port of Hamcrest and essentially follows a literal translation of the original Java API for Hamcrest, with a few Exceptions, mostly down to PHP language barriers:

instanceOf($theClass) is actually anInstanceOf($theClass)
both(containsString('a'))->and(containsString('b')) is actually both(containsString('a'))->andAlso(containsString('b'))
either(containsString('a'))->or(containsString('b')) is actually either(containsString('a'))->orElse(containsString('b'))
Unless it would be non-semantic for a matcher to do so, hamcrest-php allows dynamic typing for it's input, in "the PHP way". Exception are where semantics surrounding the type itself would suggest otherwise, such as stringContains() and greaterThan().
Several official matchers have not been ported because they don't make sense or don't apply in PHP:
- typeCompatibleWith($theClass)
- eventFrom($source)
- hasProperty($name) **
- samePropertyValuesAs($obj) **
When most of the collections matchers are finally ported, PHP-specific aliases will probably be created due to a difference in naming conventions between Java's Arrays, Collections, Sets and Maps compared with PHP's Arrays.

** [Unless we consider POPO's (Plain Old PHP Objects) akin to JavaBeans]

 - The POPO thing is a joke.  Java devs coin the term POJO's (Plain Old
   Java Objects).

Usage

Hamcrest matchers are easy to use as:

Hamcrest_MatcherAssert::assertThat('a', Hamcrest_Matchers::equalToIgnoringCase('A'));

Alternatively, you can use the global proxy-functions:

$result = true;
// with an identifier
assertThat("result should be true", $result, equalTo(true));

// without an identifier
assertThat($result, equalTo(true));

// evaluate a boolean expression
assertThat($result === true);

// with syntactic sugar is()
assertThat(true, is(true));

:warning: NOTE: the global proxy-functions aren't autoloaded by default, so you will need to load them first:

\Hamcrest\Util::registerGlobalFunctions();

For brevity, all of the examples below use the proxy-functions.

Documentation

A tutorial can be found on the Hamcrest site.

Available Matchers

Array

anArray - evaluates an array
```
assertThat([], anArray());
```

hasItemInArray - check if item exists in array

$list = range(2, 7, 2);
$item = 4;
assertThat($list, hasItemInArray($item));

hasValue - alias of hasItemInArray

arrayContainingInAnyOrder - check if array contains elements in any order

assertThat([2, 4, 6], arrayContainingInAnyOrder([6, 4, 2]));
assertThat([2, 4, 6], arrayContainingInAnyOrder([4, 2, 6]));

containsInAnyOrder - alias of arrayContainingInAnyOrder

arrayContaining - An array with elements that match the given matchers in the same order.

assertThat([2, 4, 6], arrayContaining([2, 4, 6]));
assertthat([2, 4, 6], not(arrayContaining([6, 4, 2])));

contains - check array in same order

assertThat([2, 4, 6], contains([2, 4, 6]));

hasKeyInArray - check if array has given key

assertThat(['name'=> 'foobar'], hasKeyInArray('name'));

hasKey - alias of hasKeyInArray

hasKeyValuePair - check if arary has given key, value pair

assertThat(['name'=> 'foobar'], hasKeyValuePair('name', 'foobar'));

hasEntry - same as hasKeyValuePair

arrayWithSize - check array has given size

assertthat([2, 4, 6], arrayWithSize(3));

emptyArray - check if array is emtpy
```
assertThat([], emptyArray());
```
nonEmptyArray
```
assertThat([1], nonEmptyArray());
```

Collection

emptyTraversable - check if traversable is empty

$empty_it = new EmptyIterator;
assertThat($empty_it, emptyTraversable());

nonEmptyTraversable - check if traversable isn't empty

$non_empty_it = new ArrayIterator(range(1, 10));
assertThat($non_empty_it, nonEmptyTraversable());
a

traversableWithSize

$non_empty_it = new ArrayIterator(range(1, 10));
assertThat($non_empty_it, traversableWithSize(count(range(1, 10))));
`

Core

allOf - Evaluates to true only if ALL of the passed in matchers evaluate to true.
```
assertThat([2,4,6], allOf(hasValue(2), arrayWithSize(3)));
```
anyOf - Evaluates to true if ANY of the passed in matchers evaluate to true.
```
assertThat([2, 4, 6], anyOf(hasValue(8), hasValue(2)));
```
noneOf - Evaluates to false if ANY of the passed in matchers evaluate to true.
```
assertThat([2, 4, 6], noneOf(hasValue(1), hasValue(3)));
```
both + andAlso - This is useful for fluently combining matchers that must both pass.
```
assertThat([2, 4, 6], both(hasValue(2))->andAlso(hasValue(4)));
```
either + orElse - This is useful for fluently combining matchers where either may pass,
```
assertThat([2, 4, 6], either(hasValue(2))->orElse(hasValue(4)));
```

describedAs - Wraps an existing matcher and overrides the description when it fails.

$expected = "Dog";
$found = null;
// this assertion would result error message as Expected: is not null but: was null
//assertThat("Expected {$expected}, got {$found}", $found, is(notNullValue()));
// and this assertion would result error message as Expected: Dog but: was null
//assertThat($found, describedAs($expected, notNullValue()));

everyItem - A matcher to apply to every element in an array.
```
assertThat([2, 4, 6], everyItem(notNullValue()));
```
hasItem - check array has given item, it can take a matcher argument
```
assertThat([2, 4, 6], hasItem(equalTo(2)));
```
hasItems - check array has givem items, it can take multiple matcher as arguments
```
assertThat([1, 3, 5], hasItems(equalTo(1), equalTo(3)));
```

Object

hasToString - check __toString or toString method

class Foo {
public $name = null;

public function __toString() {
    return "[Foo]Instance";
}
}
$foo = new Foo;
assertThat($foo, hasToString(equalTo("[Foo]Instance")));

equalTo - compares two instances using comparison operator '=='

$foo = new Foo;
$foo2 = new Foo;
assertThat($foo, equalTo($foo2));

identicalTo - compares two instances using identity operator '==='
```
assertThat($foo, is(not(identicalTo($foo2))));
```
anInstanceOf - check instance is an instance|sub-class of given class
```
assertThat($foo, anInstanceOf(Foo::class));
```
any - alias of anInstanceOf
nullValue check null
```
assertThat(null, is(nullValue()));
```
notNullValue check not null
```
assertThat("", notNullValue());
```

sameInstance - check for same instance

assertThat($foo, is(not(sameInstance($foo2))));
assertThat($foo, is(sameInstance($foo)));

typeOf- check type
```
assertThat(1, typeOf("integer"));
```
notSet - check if instance property is not set
```
assertThat($foo, notSet("name"));
```

set - check if instance property is set

$foo->name = "bar";
assertThat($foo, set("name"));

Numbers

closeTo - check value close to a range
```
assertThat(3, closeTo(3, 0.5));
```
comparesEqualTo - check with '=='
```
assertThat(2, comparesEqualTo(2));
```
greaterThan - check '>'
```
assertThat(2, greaterThan(1));
```

greaterThanOrEqualTo

assertThat(2, greaterThanOrEqualTo(2));

atLeast - The value is >= given value
```
assertThat(3, atLeast(2));
```
lessThan
```
assertThat(2, lessThan(3));
```
lessThanOrEqualTo
```
assertThat(2, lessThanOrEqualTo(3));
```
atMost - The value is <= given value
```
assertThat(2, atMost(3));
```

String

emptyString - check for empty string
```
assertThat("", emptyString());
```

isEmptyOrNullString

assertThat(null, isEmptyOrNullString());

nullOrEmptyString
```
assertThat("", nullOrEmptyString());
```
isNonEmptyString
```
assertThat("foo", isNonEmptyString());
```
nonEmptyString
```
assertThat("foo", nonEmptyString());
```

equalToIgnoringCase

assertThat("Foo", equalToIgnoringCase("foo"));

equalToIgnoringWhiteSpace

assertThat(" Foo ", equalToIgnoringWhiteSpace("Foo"));

matchesPattern - matches with regex pattern

assertThat("foobarbaz", matchesPattern('/(foo)(bar)(baz)/'));

containsString - check for substring

assertThat("foobar", containsString("foo"));

containsStringIgnoringCase

assertThat("fooBar", containsStringIgnoringCase("bar"));

stringContainsInOrder

assertThat("foo", stringContainsInOrder("foo"));

endsWith - check string that ends with given value
```
assertThat("foo", endsWith("oo"));
```
startsWith - check string that starts with given value
```
assertThat("bar", startsWith("ba"));
```

Type-checking

arrayValue - check array type
```
assertThat([], arrayValue());
```
booleanValue
```
assertThat(true, booleanValue());
```
boolValue - alias of booleanValue

callableValue - check if value is callable

$func = function () {};
assertThat($func, callableValue());

doubleValue
```
assertThat(3.14, doubleValue());
```
floatValue
```
assertThat(3.14, floatValue());
```
integerValue
```
assertThat(1, integerValue());
```
intValue - alias of integerValue
numericValue - check if value is numeric
```
assertThat("123", numericValue());
```

objectValue - check for object

$obj = new stdClass;
assertThat($obj, objectValue());

anObject
```
assertThat($obj, anObject());
```

resourceValue - check resource type

$fp = fopen("/tmp/foo", "w+");
assertThat($fp, resourceValue());

scalarValue - check for scaler value
```
assertThat(1, scalarValue());
```
stringValue
```
assertThat("", stringValue());
```

XML

hasXPath - check xml with a xpath ```php $xml = << 1
2
XML;

$doc = new DOMDocument; $doc->loadXML($xml); assertThat($doc, hasXPath("book", 2)); ```

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