Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php  | 
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| 9 | class Test_Terms_Of_Service extends TestCase { | 
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| 10 | |||
| 11 | /**  | 
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| 12 | * Test setup.  | 
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| 13 | */  | 
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| 14 | 	public function setUp() { | 
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| 15 | $this->terms_of_service = $this->createPartialMock( __NAMESPACE__ .'\\Terms_Of_Service',  | 
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| 16 | array( 'get_raw_has_agreed', 'is_development_mode', 'is_active', 'set_agree', 'set_reject' )  | 
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| 17 | )  | 
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| 18 | }  | 
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| 19 | |||
| 20 | /**  | 
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| 21 | * Test teardown.  | 
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| 22 | */  | 
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| 23 | 	public function tearDown() { | 
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| 24 | Mock::disableAll();  | 
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| 25 | }  | 
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| 26 | |||
| 27 | /**  | 
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| 28 | * @covers Automattic\Jetpack\Terms_Of_Service->agree  | 
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| 29 | */  | 
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| 30 | 	public function test_agree() { | 
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| 31 | $this->mock_function( 'do_action', null, 'jetpack_agreed_to_terms_of_service' );  | 
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| 32 | $this->terms_of_service->expects( $this->once() )->method( 'set_agree' )->willReturn( null );  | 
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| 33 | |||
| 34 | $this->terms_of_service->agree();  | 
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| 35 | }  | 
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| 36 | |||
| 37 | /**  | 
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| 38 | * @covers Automattic\Jetpack\Terms_Of_Service->revoke  | 
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| 39 | */  | 
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| 40 | 	public function test_revoke() { | 
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| 41 | $this->mock_function( 'do_action', null, 'jetpack_reject_to_terms_of_service' );  | 
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| 42 | $this->terms_of_service->expects( $this->once() )->method( 'set_reject' )->willReturn( null );  | 
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| 43 | |||
| 44 | $this->terms_of_service->reject();  | 
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| 45 | }  | 
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| 46 | |||
| 47 | /**  | 
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| 48 | * @covers Automattic\Jetpack\Terms_Of_Service->has_agreed  | 
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| 49 | */  | 
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| 50 | 	public function test_has_agreed_before_the_site_agrees() { | 
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| 51 | $this->terms_of_service->expects( $this->once() )->method( 'get_raw_has_agreed' )->willReturn( false );  | 
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| 52 | $this->assertFalse( $this->terms_of_service->has_agreed() );  | 
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| 53 | }  | 
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| 54 | |||
| 55 | /**  | 
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| 56 | * @covers Automattic\Jetpack\Terms_Of_Service->has_agreed  | 
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| 57 | */  | 
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| 58 | 	public function test_has_agreed_is_development_mode() { | 
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| 59 | $this->terms_of_service->expects( $this->once() )->method( 'get_raw_has_agreed' )->willReturn( true );  | 
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| 60 | // is_development_mode  | 
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| 61 | $this->terms_of_service->expects( $this->once() )->method( 'is_development_mode' )->willReturn( true );  | 
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| 62 | $this->assertFalse( $this->terms_of_service->has_agreed() );  | 
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| 63 | }  | 
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| 64 | |||
| 65 | /**  | 
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| 66 | * @covers Automattic\Jetpack\Terms_Of_Service->has_agreed  | 
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| 67 | */  | 
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| 68 | 	public function test_has_agreed_is_active_mode() { | 
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| 69 | $this->terms_of_service->expects( $this->once() )->method( 'get_raw_has_agreed' )->willReturn( true );  | 
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| 70 | // Not in dev mode...  | 
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| 71 | $this->terms_of_service->expects( $this->once() )->method( 'is_development_mode' )->willReturn( false );  | 
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| 72 | |||
| 73 | // Jetpack is active  | 
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| 74 | $this->terms_of_service->expects( $this->once() )->method( 'is_active' )->willReturn( true );  | 
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| 75 | |||
| 76 | $this->assertTrue( $this->terms_of_service->has_agreed() );  | 
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| 77 | }  | 
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| 78 | |||
| 79 | /**  | 
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| 80 | * @covers Automattic\Jetpack\Terms_Of_Service->has_agreed  | 
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| 81 | */  | 
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| 82 | 	public function test_has_agreed_is_not_active_mode() { | 
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| 83 | $this->terms_of_service->expects( $this->once() )->method( 'get_raw_has_agreed' )->willReturn( true );  | 
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| 84 | // not in dev mode...  | 
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| 85 | $this->terms_of_service->expects( $this->once() )->method( 'is_development_mode' )->willReturn( false );  | 
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| 86 | |||
| 87 | // Jetpack is not active  | 
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| 88 | $this->terms_of_service->expects( $this->once() )->method( 'is_active' )->willReturn( false );  | 
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| 89 | |||
| 90 | $this->assertFalse( $this->terms_of_service->has_agreed() );  | 
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| 91 | }  | 
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| 92 | |||
| 93 | /**  | 
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| 94 | * Mock a global function and make it return a certain value.  | 
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| 95 | *  | 
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| 96 | * @param string $function_name Name of the function.  | 
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| 97 | * @param mixed $return_value Return value of the function.  | 
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| 98 | * @return phpmock\Mock The mock object.  | 
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| 99 | */  | 
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| 100 | 	protected function mock_function( $function_name, $return_value = null, $called_with = null ) { | 
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| 101 | $builder = new MockBuilder();  | 
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| 102 | $builder->setNamespace( __NAMESPACE__ )  | 
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| 103 | ->setName( $function_name )  | 
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| 104 | 		        ->setFunction( function( $VALUE ) use ( &$return_value, $called_with ) { | 
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| 105 | 		        	if ( $called_with ) { | 
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| 106 | $this->assertEquals( $VALUE, $called_with );  | 
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| 107 | }  | 
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| 108 | return $return_value;  | 
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| 109 | } );  | 
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| 110 | return $builder->build()->enable();  | 
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| 113 |