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pippijn |
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=head1 Unit testing |
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Ermyth provides a simple yet powerful and specialised unit testing framework. |
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Tests are grouped by putting them in files. For example all tests regarding |
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metadata go into F<test/metadata.C>. Tests are compiled to .t files, which are |
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simple executables that get run by make test. |
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=head2 Test boilerplate |
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The very first line each testgroup should be |
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#include "unit/test.h" |
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and the very last line should be |
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#include "unit/runtest.h" |
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=head2 Defining tests |
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Defining tests is very simple: |
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test<number> () |
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{ |
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// do something here |
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} |
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=head2 Assertions |
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Ermyth's unit test framework provides five assertions: |
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=over |
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=item ensure (expr) |
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Writes an error if C<expr> does not evaluate to a true value. |
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=item ensure_streq (str, expected) |
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Checks with strcmp whether C<str> and C<expected> are equal. |
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Both C<str> and C<expected> need to be one of C<char *>, |
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C<char const *>, C<char const * const> or an C<unsigned> variant of one. |
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=item ensure_null (expr) |
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Checks whether expr is NULL or 0. |
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This check requires C<expr> to be |
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L<EqualityComparable|http://www.generic-programming.org/languages/conceptcpp/concept_web.php?header=concepts#EqualityComparable>. |
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=item ensure_equals (actual, expected) |
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Checks whether C<actual> evaluates to C<expected>. |
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This check requires C<actual> and C<expected> to be |
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L<EqualityComparable|http://www.generic-programming.org/languages/conceptcpp/concept_web.php?header=concepts#EqualityComparable>. |
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=item ensure_distance (actual, expected, tolerance) |
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Checks whether C<actual> is at most C<tolerance> away from C<expected>. |
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To allow this comparison, C<actual> and C<tolerance> need to be |
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L<Addable|http://www.generic-programming.org/languages/conceptcpp/concept_web.php?header=concepts#Addable> |
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and their sum together with C<expected> needs to be |
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L<LessThanComparable|http://www.generic-programming.org/languages/conceptcpp/concept_web.php?header=concepts#LessThanComparable>. |
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=head2 Example |
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The following example can be found in F<test/metadata.C>: |
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#include "unit/test.h" |
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test<1> () |
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{ |
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metadata *md; |
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myuser_t *mu = myuser_add ("name", "pass", "email", 0); |
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mu->add_metadata ("cow", "moo"); |
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ensure_streq (md->value, "moo"); |
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mu->del_metadata ("cow"); |
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mu->add_metadata ("cow2", "moo2"); |
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mu->clear_metadata (); |
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ensure_null (md); |
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} |
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#include "unit/runtest.h" |
