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Lecture4Testing - Testing Testing can show only the...

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Testing Testing can show only the presence of bugs – not their absence Edsger Dijkstra
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Unit Tests Use unit tests to test classes individually Write a test harness to run a test
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Test Harness A test harness feeds parameters to the methods Example: public static void main (String [ ] args) { Product spam = new Product (“spam”, 100, 4.99); spam.sell( 5); //’sell’ 5 cans of spam System.out.println ( “Remaining count should be 95 and is “ + spam.getInventoryCount( ) ); }
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Positive Tests Tests that consist of legitimate inputs, and you expect the program to handle them correctly spam.sell( 5); //’sell’ 5 cans of spam
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Boundary test cases Boundary test cases are test cases that are at the boundary of acceptable inputs You expect the program to handle them correctly Example, spam.sell (100); Or spam.sell (101);
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Regression Testing A test suite is a set of tests for repeated testing Regression testing involves repeating previously run tests to ensure that known failures of prior versions do not appear in new versions
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