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>Chapter 3. Tutorial: Basic unit testing
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>This tutorial will use the JUnit Test Infected article (see <A
HREF="http://members.pingnet.ch/gamma/junit.htm"
TARGET="_top"
>Test Infected</A
>) as a starting point. We will be creating a library to represent money, allowing conversions between different currency types. The development style will be “test a little, code a little” with unit test writing preceding coding. This constantly gives us insights into module usage, and also makes sure we are constantly thinking about how to test our code.
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>3.1. How to write a test</A
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>Test writing using Check is very simple. The file in which the checks are defined must include check.h as so:
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>#include <check.h></PRE
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>The basic unit test looks as follows:
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><PRE
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>START_TEST (test_name)
{
/* unit test code */
}
END_TEST</PRE
><P
>The START_TEST/END_TEST pair are macros that setup basic structures to permit testing. It is a mistake to leave off the END_TEST marker; doing so produces all sorts of strange errors when the check is compiled.
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