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:
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| 8 | class TSchemaTypeTest extends TestCase |
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| 10 | View Code Duplication | public function testIsOKJammedOpen() |
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| 18 | View Code Duplication | public function testIsOKNotJammedOpen() |
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