Complex classes like Expectation often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Expectation, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 26 | class Expectation implements ExpectationInterface  | 
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| 27 | { | 
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| 28 | /**  | 
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| 29 | * Mock object to which this expectation belongs  | 
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| 30 | *  | 
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| 31 | * @var object  | 
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| 32 | */  | 
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| 33 | protected $_mock = null;  | 
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| 34 | |||
| 35 | /**  | 
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| 36 | * Method name  | 
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| 37 | *  | 
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| 38 | * @var string  | 
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| 39 | */  | 
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| 40 | protected $_name = null;  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * Arguments expected by this expectation  | 
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| 44 | *  | 
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| 45 | * @var array  | 
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| 46 | */  | 
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| 47 | protected $_expectedArgs = array();  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * Count validator store  | 
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| 51 | *  | 
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| 52 | * @var array  | 
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| 53 | */  | 
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| 54 | protected $_countValidators = array();  | 
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| 55 | |||
| 56 | /**  | 
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| 57 | * The count validator class to use  | 
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| 58 | *  | 
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| 59 | * @var string  | 
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| 60 | */  | 
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| 61 | protected $_countValidatorClass = 'Mockery\CountValidator\Exact';  | 
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| 62 | |||
| 63 | /**  | 
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| 64 | * Actual count of calls to this expectation  | 
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| 65 | *  | 
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| 66 | * @var int  | 
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| 67 | */  | 
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| 68 | protected $_actualCount = 0;  | 
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| 69 | |||
| 70 | /**  | 
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| 71 | * Value to return from this expectation  | 
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| 72 | *  | 
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| 73 | * @var mixed  | 
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| 74 | */  | 
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| 75 | protected $_returnValue = null;  | 
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| 76 | |||
| 77 | /**  | 
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| 78 | * Array of return values as a queue for multiple return sequence  | 
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| 79 | *  | 
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| 80 | * @var array  | 
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| 81 | */  | 
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| 82 | protected $_returnQueue = array();  | 
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| 83 | |||
| 84 | /**  | 
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| 85 | * Array of closures executed with given arguments to generate a result  | 
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| 86 | * to be returned  | 
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| 87 | *  | 
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| 88 | * @var array  | 
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| 89 | */  | 
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| 90 | protected $_closureQueue = array();  | 
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| 91 | |||
| 92 | /**  | 
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| 93 | * Array of values to be set when this expectation matches  | 
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| 94 | *  | 
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| 95 | * @var array  | 
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| 96 | */  | 
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| 97 | protected $_setQueue = array();  | 
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| 98 | |||
| 99 | /**  | 
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| 100 | * Integer representing the call order of this expectation  | 
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| 101 | *  | 
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| 102 | * @var int  | 
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| 103 | */  | 
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| 104 | protected $_orderNumber = null;  | 
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| 105 | |||
| 106 | /**  | 
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| 107 | * Integer representing the call order of this expectation on a global basis  | 
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| 108 | *  | 
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| 109 | * @var int  | 
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| 110 | */  | 
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| 111 | protected $_globalOrderNumber = null;  | 
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| 112 | |||
| 113 | /**  | 
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| 114 | * Flag indicating that an exception is expected to be throw (not returned)  | 
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| 115 | *  | 
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| 116 | * @var bool  | 
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| 117 | */  | 
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| 118 | protected $_throw = false;  | 
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| 119 | |||
| 120 | /**  | 
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| 121 | * Flag indicating whether the order of calling is determined locally or  | 
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| 122 | * globally  | 
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| 123 | *  | 
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| 124 | * @var bool  | 
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| 125 | */  | 
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| 126 | protected $_globally = false;  | 
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| 127 | |||
| 128 | /**  | 
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| 129 | * Flag indicating we expect no arguments  | 
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| 130 | *  | 
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| 131 | * @var bool  | 
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| 132 | */  | 
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| 133 | protected $_noArgsExpectation = false;  | 
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| 134 | |||
| 135 | /**  | 
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| 136 | * Flag indicating if the return value should be obtained from the original  | 
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| 137 | * class method instead of returning predefined values from the return queue  | 
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| 138 | *  | 
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| 139 | * @var bool  | 
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| 140 | */  | 
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| 141 | protected $_passthru = false;  | 
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| 142 | |||
| 143 | /**  | 
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| 144 | * Constructor  | 
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| 145 | *  | 
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| 146 | * @param \Mockery\MockInterface $mock  | 
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| 147 | * @param string $name  | 
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| 148 | */  | 
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| 149 | 306 | public function __construct(\Mockery\MockInterface $mock, $name)  | 
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| 154 | |||
| 155 | /**  | 
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| 156 | * Return a string with the method name and arguments formatted  | 
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| 157 | *  | 
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| 158 | * @param string $name Name of the expected method  | 
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| 159 | * @param array $args List of arguments to the method  | 
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| 160 | * @return string  | 
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| 161 | */  | 
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| 162 | 45 | public function __toString()  | 
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| 166 | |||
| 167 | /**  | 
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| 168 | * Verify the current call, i.e. that the given arguments match those  | 
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| 169 | * of this expectation  | 
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| 170 | *  | 
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| 171 | * @param array $args  | 
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| 172 | * @return mixed  | 
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| 173 | */  | 
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| 174 | 235 | public function verifyCall(array $args)  | 
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| 175 |     { | 
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| 176 | 235 | $this->validateOrder();  | 
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| 177 | 235 | $this->_actualCount++;  | 
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| 178 | 235 |         if (true === $this->_passthru) { | 
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| 179 | 3 | return $this->_mock->mockery_callSubjectMethod($this->_name, $args);  | 
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| 180 | }  | 
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| 181 | |||
| 182 | 233 | $return = $this->_getReturnValue($args);  | 
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| 183 | 233 | $this->throwAsNecessary($return);  | 
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| 184 | 227 | $this->_setValues();  | 
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| 185 | |||
| 186 | 227 | return $return;  | 
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| 187 | }  | 
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| 188 | |||
| 189 | /**  | 
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| 190 | * Throws an exception if the expectation has been configured to do so  | 
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| 191 | *  | 
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| 192 | * @throws \Exception|\Throwable  | 
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| 193 | * @return void  | 
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| 194 | */  | 
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| 195 | 233 | private function throwAsNecessary($return)  | 
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| 196 |     { | 
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| 197 | 233 |         if (!$this->_throw) { | 
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| 198 | 227 | return;  | 
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| 199 | }  | 
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| 200 | |||
| 201 | 7 | $type = version_compare(PHP_VERSION, '7.0.0') >= 0  | 
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| 202 | 7 | ? "\Throwable"  | 
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| 203 | 7 | : "\Exception";  | 
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| 204 | |||
| 205 | 7 |         if ($return instanceof $type) { | 
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| 206 | 7 | throw $return;  | 
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| 207 | }  | 
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| 208 | |||
| 209 | return;  | 
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| 210 | }  | 
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| 211 | |||
| 212 | /**  | 
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| 213 | * Sets public properties with queued values to the mock object  | 
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| 214 | *  | 
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| 215 | * @param array $args  | 
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| 216 | * @return mixed  | 
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| 217 | */  | 
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| 218 | 227 | protected function _setValues()  | 
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| 219 |     { | 
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| 220 | 227 |         foreach ($this->_setQueue as $name => &$values) { | 
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| 221 | 8 |             if (count($values) > 0) { | 
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| 222 | 8 | $value = array_shift($values);  | 
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| 223 | 8 |                 $this->_mock->{$name} = $value; | 
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| 224 | 8 | }  | 
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| 225 | 227 | }  | 
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| 226 | 227 | }  | 
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| 227 | |||
| 228 | /**  | 
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| 229 | * Fetch the return value for the matching args  | 
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| 230 | *  | 
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| 231 | * @param array $args  | 
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| 232 | * @return mixed  | 
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| 233 | */  | 
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| 234 | 233 | protected function _getReturnValue(array $args)  | 
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| 235 |     { | 
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| 236 | 233 |         if (count($this->_closureQueue) > 1) { | 
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| 237 | return call_user_func_array(array_shift($this->_closureQueue), $args);  | 
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| 238 | 233 |         } elseif (count($this->_closureQueue) > 0) { | 
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| 239 | 1 | return call_user_func_array(current($this->_closureQueue), $args);  | 
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| 240 | 232 |         } elseif (count($this->_returnQueue) > 1) { | 
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| 241 | 5 | return array_shift($this->_returnQueue);  | 
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| 242 | 231 |         } elseif (count($this->_returnQueue) > 0) { | 
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| 243 | 93 | return current($this->_returnQueue);  | 
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| 244 | }  | 
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| 245 | |||
| 246 | 139 | return $this->_mock->mockery_returnValueForMethod($this->_name);  | 
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| 247 | }  | 
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| 248 | |||
| 249 | /**  | 
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| 250 | * Checks if this expectation is eligible for additional calls  | 
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| 251 | *  | 
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| 252 | * @return bool  | 
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| 253 | */  | 
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| 254 | 273 | public function isEligible()  | 
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| 263 | |||
| 264 | /**  | 
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| 265 | * Check if there is a constraint on call count  | 
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| 266 | *  | 
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| 267 | * @return bool  | 
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| 268 | */  | 
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| 269 | public function isCallCountConstrained()  | 
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| 273 | |||
| 274 | /**  | 
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| 275 | * Verify call order  | 
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| 276 | *  | 
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| 277 | * @return void  | 
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| 278 | */  | 
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| 279 | 235 | public function validateOrder()  | 
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| 289 | |||
| 290 | /**  | 
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| 291 | * Verify this expectation  | 
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| 292 | *  | 
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| 293 | * @return bool  | 
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| 294 | */  | 
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| 295 | 144 | public function verify()  | 
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| 301 | |||
| 302 | /**  | 
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| 303 | * Check if the registered expectation is a MultiArgumentClosureExpectation.  | 
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| 304 | * @return bool  | 
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| 305 | */  | 
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| 306 | 116 | private function isMultiArgumentClosureExpectation()  | 
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| 310 | |||
| 311 | /**  | 
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| 312 | * Check if passed arguments match an argument expectation  | 
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| 313 | *  | 
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| 314 | * @param array $args  | 
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| 315 | * @return bool  | 
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| 316 | */  | 
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| 317 | 279 | public function matchArgs(array $args)  | 
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| 338 | |||
| 339 | /**  | 
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| 340 | * Check if passed argument matches an argument expectation  | 
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| 341 | *  | 
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| 342 | * @param mixed $expected  | 
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| 343 | * @param mixed &$actual  | 
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| 344 | * @return bool  | 
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| 345 | */  | 
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| 346 | 108 | protected function _matchArg($expected, &$actual)  | 
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| 379 | |||
| 380 | /**  | 
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| 381 | * Expected argument setter for the expectation  | 
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| 382 | *  | 
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| 383 | * @param mixed ...  | 
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| 384 | * @return self  | 
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| 385 | */  | 
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| 386 | 130 | public function with()  | 
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| 390 | |||
| 391 | /**  | 
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| 392 | * Expected arguments for the expectation passed as an array  | 
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| 393 | *  | 
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| 394 | * @param array $arguments  | 
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| 395 | * @return self  | 
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| 396 | */  | 
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| 397 | 139 | private function withArgsInArray(array $arguments)  | 
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| 406 | |||
| 407 | /**  | 
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| 408 | * Expected arguments have to be matched by the given closure.  | 
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| 409 | *  | 
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| 410 | * @param Closure $closure  | 
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| 411 | * @return self  | 
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| 412 | */  | 
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| 413 | 6 | private function withArgsMatchedByClosure(Closure $closure)  | 
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| 419 | |||
| 420 | /**  | 
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| 421 | * Expected arguments for the expectation passed as an array or a closure that matches each passed argument on  | 
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| 422 | * each function call.  | 
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| 423 | *  | 
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| 424 | * @param array|Closure $argsOrClosure  | 
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| 425 | * @return self  | 
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| 426 | */  | 
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| 427 | 146 | public function withArgs($argsOrClosure)  | 
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| 439 | |||
| 440 | /**  | 
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| 441 | * Set with() as no arguments expected  | 
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| 442 | *  | 
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| 443 | * @return self  | 
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| 444 | */  | 
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| 445 | 7 | public function withNoArgs()  | 
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| 451 | |||
| 452 | /**  | 
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| 453 | * Set expectation that any arguments are acceptable  | 
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| 454 | *  | 
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| 455 | * @return self  | 
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| 456 | */  | 
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| 457 | 3 | public function withAnyArgs()  | 
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| 463 | |||
| 464 | /**  | 
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| 465 | * Set a return value, or sequential queue of return values  | 
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| 466 | *  | 
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| 467 | * @param mixed ...  | 
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| 468 | * @return self  | 
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| 469 | */  | 
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| 470 | 106 | public function andReturn()  | 
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| 475 | |||
| 476 | /**  | 
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| 477 | * Set a return value, or sequential queue of return values  | 
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| 478 | *  | 
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| 479 | * @param mixed ...  | 
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| 480 | * @return self  | 
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| 481 | */  | 
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| 482 | public function andReturns()  | 
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| 486 | |||
| 487 | /**  | 
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| 488 | * Return this mock, like a fluent interface  | 
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| 489 | *  | 
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| 490 | * @return self  | 
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| 491 | */  | 
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| 492 | 1 | public function andReturnSelf()  | 
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| 496 | |||
| 497 | /**  | 
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| 498 | * Set a sequential queue of return values with an array  | 
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| 499 | *  | 
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| 500 | * @param array $values  | 
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| 501 | * @return self  | 
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| 502 | */  | 
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| 503 | 2 | public function andReturnValues(array $values)  | 
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| 508 | |||
| 509 | /**  | 
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| 510 | * Set a closure or sequence of closures with which to generate return  | 
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| 511 | * values. The arguments passed to the expected method are passed to the  | 
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| 512 | * closures as parameters.  | 
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| 513 | *  | 
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| 514 | * @param callable ...  | 
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| 515 | * @return self  | 
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| 516 | */  | 
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| 517 | 1 | public function andReturnUsing()  | 
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| 522 | |||
| 523 | /**  | 
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| 524 | * Return a self-returning black hole object.  | 
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| 525 | *  | 
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| 526 | * @return self  | 
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| 527 | */  | 
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| 528 | 1 | public function andReturnUndefined()  | 
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| 533 | |||
| 534 | /**  | 
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| 535 | * Return null. This is merely a language construct for Mock describing.  | 
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| 536 | *  | 
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| 537 | * @return self  | 
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| 538 | */  | 
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| 539 | 1 | public function andReturnNull()  | 
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| 543 | |||
| 544 | 1 | public function andReturnFalse()  | 
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| 548 | |||
| 549 | 1 | public function andReturnTrue()  | 
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| 553 | |||
| 554 | /**  | 
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| 555 | * Set Exception class and arguments to that class to be thrown  | 
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| 556 | *  | 
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| 557 | * @param string|\Exception $exception  | 
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| 558 | * @param string $message  | 
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| 559 | * @param int $code  | 
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| 560 | * @param \Exception $previous  | 
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| 561 | * @return self  | 
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| 562 | */  | 
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| 563 | 6 | public function andThrow($exception, $message = '', $code = 0, \Exception $previous = null)  | 
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| 573 | |||
| 574 | /**  | 
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| 575 | * Set Exception classes to be thrown  | 
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| 576 | *  | 
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| 577 | * @param array $exceptions  | 
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| 578 | * @return self  | 
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| 579 | */  | 
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| 580 | 2 | public function andThrowExceptions(array $exceptions)  | 
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| 590 | |||
| 591 | /**  | 
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| 592 | * Register values to be set to a public property each time this expectation occurs  | 
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| 593 | *  | 
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| 594 | * @param string $name  | 
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| 595 | * @param mixed $value  | 
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| 596 | * @return self  | 
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| 597 | */  | 
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| 598 | 8 | public function andSet($name, $value)  | 
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| 605 | |||
| 606 | /**  | 
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| 607 | * Alias to andSet(). Allows the natural English construct  | 
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| 608 |      * - set('foo', 'bar')->andReturn('bar') | 
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| 609 | *  | 
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| 610 | * @param string $name  | 
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| 611 | * @param mixed $value  | 
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| 612 | * @return self  | 
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| 613 | */  | 
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| 614 | 3 | public function set($name, $value)  | 
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| 618 | |||
| 619 | /**  | 
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| 620 | * Indicates this expectation should occur zero or more times  | 
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| 621 | *  | 
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| 622 | * @return self  | 
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| 623 | */  | 
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| 624 | 2 | public function zeroOrMoreTimes()  | 
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| 628 | |||
| 629 | /**  | 
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| 630 | * Indicates the number of times this expectation should occur  | 
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| 631 | *  | 
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| 632 | * @param int $limit  | 
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| 633 | * @throws InvalidArgumentException  | 
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| 634 | * @return self  | 
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| 635 | */  | 
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| 636 | 158 | public function times($limit = null)  | 
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| 648 | |||
| 649 | /**  | 
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| 650 | * Indicates that this expectation is never expected to be called  | 
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| 651 | *  | 
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| 652 | * @return self  | 
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| 653 | */  | 
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| 654 | 38 | public function never()  | 
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| 658 | |||
| 659 | /**  | 
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| 660 | * Indicates that this expectation is expected exactly once  | 
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| 661 | *  | 
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| 662 | * @return self  | 
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| 663 | */  | 
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| 664 | 108 | public function once()  | 
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| 668 | |||
| 669 | /**  | 
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| 670 | * Indicates that this expectation is expected exactly twice  | 
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| 671 | *  | 
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| 672 | * @return self  | 
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| 673 | */  | 
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| 674 | 19 | public function twice()  | 
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| 678 | |||
| 679 | /**  | 
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| 680 | * Sets next count validator to the AtLeast instance  | 
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| 681 | *  | 
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| 682 | * @return self  | 
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| 683 | */  | 
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| 684 | 14 | public function atLeast()  | 
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| 689 | |||
| 690 | /**  | 
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| 691 | * Sets next count validator to the AtMost instance  | 
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| 692 | *  | 
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| 693 | * @return self  | 
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| 694 | */  | 
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| 695 | 7 | public function atMost()  | 
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| 700 | |||
| 701 | /**  | 
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| 702 | * Shorthand for setting minimum and maximum constraints on call counts  | 
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| 703 | *  | 
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| 704 | * @param int $minimum  | 
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| 705 | * @param int $maximum  | 
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| 706 | */  | 
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| 707 | public function between($minimum, $maximum)  | 
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| 711 | |||
| 712 | /**  | 
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| 713 | * Indicates that this expectation must be called in a specific given order  | 
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| 714 | *  | 
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| 715 | * @param string $group Name of the ordered group  | 
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| 716 | * @return self  | 
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| 717 | */  | 
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| 718 | 17 | public function ordered($group = null)  | 
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| 728 | |||
| 729 | /**  | 
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| 730 | * Indicates call order should apply globally  | 
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| 731 | *  | 
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| 732 | * @return self  | 
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| 733 | */  | 
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| 734 | 1 | public function globally()  | 
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| 739 | |||
| 740 | /**  | 
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| 741 | * Setup the ordering tracking on the mock or mock container  | 
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| 742 | *  | 
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| 743 | * @param string $group  | 
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| 744 | * @param object $ordering  | 
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| 745 | * @return int  | 
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| 746 | */  | 
            ||
| 747 | 17 | protected function _defineOrdered($group, $ordering)  | 
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| 760 | |||
| 761 | /**  | 
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| 762 | * Return order number  | 
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| 763 | *  | 
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| 764 | * @return int  | 
            ||
| 765 | */  | 
            ||
| 766 | 1 | public function getOrderNumber()  | 
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| 770 | |||
| 771 | /**  | 
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| 772 | * Mark this expectation as being a default  | 
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| 773 | *  | 
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| 774 | * @return self  | 
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| 775 | */  | 
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| 776 | 25 | public function byDefault()  | 
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| 784 | |||
| 785 | /**  | 
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| 786 | * Return the parent mock of the expectation  | 
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| 787 | *  | 
            ||
| 788 | * @return \Mockery\MockInterface  | 
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| 789 | */  | 
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| 790 | 29 | public function getMock()  | 
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| 794 | |||
| 795 | /**  | 
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| 796 | * Flag this expectation as calling the original class method with the  | 
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| 797 | * any provided arguments instead of using a return value queue.  | 
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| 798 | *  | 
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| 799 | * @return self  | 
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| 800 | */  | 
            ||
| 801 | 3 | public function passthru()  | 
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| 812 | |||
| 813 | /**  | 
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| 814 | * Cloning logic  | 
            ||
| 815 | *  | 
            ||
| 816 | */  | 
            ||
| 817 | 9 | public function __clone()  | 
            |
| 826 | |||
| 827 | 6 | public function getName()  | 
            |
| 831 | }  | 
            ||
| 832 |