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	docs: Typo fixes in testing/philosophy.md.
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						Tim Abbott
					
				
			
			
				
	
			
			
			
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			@@ -64,16 +64,16 @@ these goals, but a few techniques are worth highlighting:
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* Our test suites are designed to not access the Internet, since the
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  Internet might be down or unreliable in the test environment.  Where
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  outgoing HTTP requests are required to test something, we mock the
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  responses with libraries like `httpretty`.
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  responses with libraries like `responses`.
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* We carefully avoid the potential for contamination of data inside
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  services like potsgres, redis, and memcached from different tests.
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  services like postgres, redis, and memcached from different tests.
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    * Every test case prepends a unique random prefix to all keys it
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      uses when accessing redis and memcached.
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    * Every test case runs inside a database transaction, which is
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      aborted after the test completes.  Each test process interacts
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      only with a fresh copy of a special template database used for
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      server tests that is destroyed after the process completes.
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* We rigorously investigate non-deterministically failing tests though
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* We rigorously investigate non-deterministically failing tests as though
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  they were priority bugs in the product.
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## Integration testing or unit testing?
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