SiroDiaz /
DataStructures
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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| 8 | class TrieTreeTest extends TestCase { |
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| 9 | private $tree; |
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| 10 | |||
| 11 | public function setUp() { |
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| 12 | $this->tree = new TrieTree(); |
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| 13 | } |
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| 14 | |||
| 15 | public function testAdd() { |
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| 16 | $this->tree->add('hello'); |
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| 17 | $this->tree->add('bye'); |
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| 18 | $this->assertEquals(8, $this->tree->size()); |
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| 19 | $this->tree->add('hello'); |
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| 20 | $this->assertEquals(8, $this->tree->size()); |
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| 21 | $this->tree->add('hell'); |
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| 22 | $this->assertEquals(8, $this->tree->size()); |
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| 23 | } |
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| 24 | |||
| 25 | public function testWordCount() { |
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| 26 | $this->tree->add('hello'); |
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| 27 | $this->assertEquals(1, $this->tree->wordCount()); |
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| 28 | $this->tree->add('bye'); |
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| 29 | $this->assertEquals(2, $this->tree->wordCount()); |
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| 30 | $this->tree->add('hello'); |
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| 31 | $this->assertEquals(2, $this->tree->wordCount()); |
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| 32 | $this->tree->add('hell'); |
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| 33 | $this->assertEquals(3, $this->tree->wordCount()); |
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| 34 | } |
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| 35 | |||
| 36 | public function testContains() { |
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| 37 | $this->tree->add('hello'); |
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| 38 | $this->assertTrue($this->tree->contains('hello')); |
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| 39 | $this->tree->add('bye'); |
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| 40 | $this->assertTrue($this->tree->contains('bye')); |
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| 41 | $this->assertFalse($this->tree->contains('what')); |
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| 42 | } |
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| 43 | |||
| 44 | public function testStartsWith() { |
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| 45 | $this->assertFalse($this->tree->startsWith('hello')); |
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| 46 | $this->tree->add('hello'); |
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| 47 | $this->tree->add('bye'); |
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| 48 | $this->assertTrue($this->tree->startsWith('b')); |
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| 49 | $this->assertTrue($this->tree->startsWith('hel')); |
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| 50 | $this->assertFalse($this->tree->startsWith('hellooo')); |
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| 51 | } |
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| 52 | |||
| 53 | public function testWithPrefix() { |
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| 54 | $this->tree->add('hello'); |
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| 55 | $this->tree->add('hell'); |
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| 56 | $this->tree->add('bye'); |
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| 57 | $this->tree->add('beyond'); |
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| 58 | $withH = $this->tree->withPrefix('he'); |
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| 59 | $withB = $this->tree->withPrefix('b'); |
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| 60 | $withBy = $this->tree->withPrefix('by'); |
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| 61 | $all = $this->tree->withPrefix(''); |
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| 62 | |||
| 63 | $this->assertSame(['hell', 'hello'], $withH); |
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| 64 | $this->assertSame(['bye', 'beyond'], $withB); |
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| 65 | $this->assertSame(['bye'], $withBy); |
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| 66 | $this->assertSame(['hell', 'hello', 'bye', 'beyond'], $all); |
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| 67 | $this->assertEquals(4, $this->tree->wordCount()); |
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| 68 | } |
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| 69 | |||
| 70 | public function testDelete() { |
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| 71 | $this->tree->add('hellou'); |
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| 72 | $this->tree->add('hell'); |
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| 73 | $this->tree->add('yellow'); |
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| 74 | $this->tree->delete('hellou'); |
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| 75 | $this->assertEquals(2, $this->tree->wordCount()); |
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| 76 | $this->assertFalse($this->tree->contains('hellou')); |
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| 77 | $this->assertTrue($this->tree->contains('hell')); |
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| 78 | $this->assertTrue($this->tree->contains('yellow')); |
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| 79 | $this->tree->delete('yellow'); |
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| 80 | $this->assertEquals(4, $this->tree->size()); |
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| 81 | } |
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| 82 | |||
| 83 | public function testClear() { |
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| 84 | $this->tree->add('hellou'); |
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| 85 | $this->tree->add('hell'); |
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| 86 | $this->tree->add('yellow'); |
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| 87 | $this->assertEquals(3, $this->tree->wordCount()); |
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| 88 | $this->tree->clear(); |
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| 89 | $this->assertFalse($this->tree->contains('hellou')); |
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| 90 | $this->assertFalse($this->tree->contains('hell')); |
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| 91 | $this->assertFalse($this->tree->contains('yellow')); |
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| 92 | $this->assertEquals(0, $this->tree->size()); |
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| 93 | } |
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| 94 | |||
| 95 | public function testGetWords() { |
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| 96 | $this->assertSame([], $this->tree->getWords()); |
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| 97 | $this->tree->add('hello'); |
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| 98 | $this->tree->add('hell'); |
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| 99 | $this->tree->add('yellow'); |
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| 100 | $this->tree->add(''); |
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| 101 | $this->assertEquals(3, $this->tree->wordCount()); |
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| 102 | $this->assertSame(['hell', 'hello', 'yellow'], $this->tree->getWords()); |
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| 103 | $this->tree->delete('hello'); |
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| 104 | $this->assertSame(['hell', 'yellow'], $this->tree->getWords()); |
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| 105 | $this->tree->delete('hell'); |
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| 106 | $this->assertSame(['yellow'], $this->tree->getWords()); |
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| 107 | $this->tree->delete('yellow'); |
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| 108 | $this->assertSame([], $this->tree->getWords()); |
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| 109 | } |
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| 110 | } |
