Complex classes like EuroTest 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 EuroTest, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 16 | class EuroTest extends TestCase { |
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| 17 | |||
| 18 | /** |
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| 19 | * @dataProvider unsignedIntegerProvider |
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| 20 | */ |
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| 21 | public function testGetCentsReturnsConstructorArgument( int $unsignedInteger ) { |
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| 25 | |||
| 26 | public function unsignedIntegerProvider() { |
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| 32 | |||
| 33 | public function testGivenZero_getEuroFloatReturnsZeroFloat() { |
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| 38 | |||
| 39 | private function assertExactFloat( float $expected, $actual ) { |
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| 43 | |||
| 44 | public function testGivenOneEuro_getEuroFloatReturnsOne() { |
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| 48 | |||
| 49 | public function testGivenOneCent_getEuroFloatReturnsPointZeroOne() { |
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| 53 | |||
| 54 | public function testGiven33cents_getEuroFloatReturnsPointThreeThree() { |
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| 58 | |||
| 59 | public function testGivenNegativeAmount_constructorThrowsException() { |
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| 63 | |||
| 64 | public function testGivenZero_getEuroStringReturnsZeroString() { |
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| 68 | |||
| 69 | public function testGivenOneEuro_getEuroStringReturnsOnePointZeroZero() { |
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| 73 | |||
| 74 | public function testGivenTwoEuros_getEuroStringReturnsTwoPointZeroZero() { |
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| 78 | |||
| 79 | public function testGivenOneCent_getEuroStringReturnsZeroPointZeroOne() { |
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| 83 | |||
| 84 | public function testGivenTenCents_getEuroStringReturnsZeroPointOneZero() { |
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| 88 | |||
| 89 | public function testGiven1234Cents_getEuroStringReturns12euro34() { |
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| 93 | |||
| 94 | public function testOneEuroString_getsTurnedInto100cents() { |
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| 97 | |||
| 98 | public function testOneCentString_getsTurnedInto1cents() { |
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| 101 | |||
| 102 | public function testTenCentString_getsTurnedInto10cents() { |
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| 105 | |||
| 106 | public function testShortTenCentString_getsTurnedInto10cents() { |
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| 109 | |||
| 110 | public function testShortOneEuroString_getsTurnedInto100cents() { |
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| 113 | |||
| 114 | public function testOneDecimalOneEuroString_getsTurnedInto100cents() { |
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| 117 | |||
| 118 | public function testMultiDecimalOneEuroString_getsTurnedInto100cents() { |
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| 121 | |||
| 122 | public function testHandlingOfLargeEuroString() { |
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| 125 | |||
| 126 | public function testEuroStringThatCausedRoundingError_doesNotCauseRoundingError() { |
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| 131 | |||
| 132 | public function testEuroStringWithRoundingError_getsRoundedAppropriately() { |
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| 148 | |||
| 149 | public function testGivenNegativeAmountString_exceptionIsThrown() { |
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| 153 | |||
| 154 | public function testGivenStringWithComma_exceptionIsThrown() { |
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| 158 | |||
| 159 | public function testGivenStringWithMultipleDots_ExceptionIsThrown() { |
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| 163 | |||
| 164 | public function testGivenNonNumber_exceptionIsThrown() { |
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| 168 | |||
| 169 | public function testGivenNegativeFloatAmount_exceptionIsThrown() { |
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| 173 | |||
| 174 | public function testOneEuroFloat_getsTurnedInto100cents() { |
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| 177 | |||
| 178 | public function testOneCentFloat_getsTurnedInto1cent() { |
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| 181 | |||
| 182 | public function testTenCentFloat_getsTurnedInto10cents() { |
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| 185 | |||
| 186 | public function testHandlingOfLargeEuroFloat() { |
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| 189 | |||
| 190 | public function testFloatWithRoundingError_getsRoundedAppropriately() { |
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| 201 | |||
| 202 | public function testZeroEuroIntegers_isZeroCents() { |
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| 205 | |||
| 206 | public function testOneEuroIntegers_is100cents() { |
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| 209 | |||
| 210 | public function test1337EuroIntegers_is133700cents() { |
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| 213 | |||
| 214 | public function testGivenNegativeIntegerAmount_exceptionIsThrown() { |
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| 218 | |||
| 219 | /** |
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| 220 | * @dataProvider euroProvider |
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| 221 | * @param Euro $euro |
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| 222 | */ |
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| 223 | public function testEuroEqualsItself( Euro $euro ) { |
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| 226 | |||
| 227 | public function euroProvider() { |
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| 236 | |||
| 237 | public function testOneCentDoesNotEqualOneEuro() { |
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| 240 | |||
| 241 | public function testOneCentDoesNotEqualTwoCents() { |
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| 244 | |||
| 245 | public function testOneCentDoesNotEqualOneEuroAndOneCent() { |
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| 248 | |||
| 249 | public function test9001centsDoesNotEqual9000cents() { |
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| 252 | |||
| 253 | } |
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| 254 |