A General/UnitTest is a test for a single unit of code– usually, a class.

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A class is not a single unit of code. A method is not necessarily a single unit of code.

Look at the parseXml method in General/OmniExpatExample for example (copied here for convenience)

• (void)parseXml: (General/NSString*)content { XML_Parser parser = XML_ParserCreate(“UTF-8”); XML_SetElementHandler(parser, handleStartElement, handleEndElement); XML_SetCharacterDataHandler(parser, handleCharacters);

  if (XML_Parse(parser, [content UTF8String], [content length], YES ) == 0) { int errorCode = XML_GetErrorCode(parser); int lineNumber = XML_GetCurrentLineNumber(parser); const char* errorDescription = XML_ErrorString(errorCode); General/NSLog(@”Parse Failure, code: %d, line: %d, description: %s”, errorCode, lineNumber, errorDescription);

    XML_ParserFree(parser);   }
  

  XML_ParserFree(parser); }

This method needs at least two unit tests: one where the if statement evaluates to true and one where it evaluates to false.

Some methods, like simple getters and setters, don’t need tests. Some methods need multiple tests.

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Indeed, a single test case should test a single expected result. Check out http://www.c2.com/cgi/wiki?General/UnitTest for a very detailed discussion of unit tests. In fact, spend the next 10 days trawling through c2. It’s a requisite read.

General/TufTy

From their site: “We are located in Portland, Oregon, though now our work now takes us to Redmond every other week.” … and this is supposed to make me trust their code-testing abilities?

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It’s actually their testing abilities - and Redmond’s awareness of their need for them - that started the bi-weekly trips.