Finish testing module documentation.

README.md

@@ -120,6 +120,48 @@ exception is raised with the ```name``` of the test added to the
 exception. If the test passes, prints "." like all tests from this
 module do.
 
+    (test-equal? name expression expected-result)
+
+* ```name``` - identifier representing the name of the test
+* ```expression``` - expression to be evaluated
+* ```expected-result``` - expected result of the test expression
+
+Evaluates the test ```expression``` and compares the result with
+```expected-result``` using ```equal?```. If the comparison fails, an
+exception is raised with the ```name``` of the test added to the
+exception. If the test passes, prints "." like all tests from this
+module do.
+
+    (test-true name expression)
+
+* ```name``` - identifier representing the name of the test
+* ```expression``` - expression to be evaluated
+
+Evaluates the test ```expression``` and checks whether the result is
+```#t``` (true). An exception is raised if it is not with the
+```name``` of the test added to the exception. If the test passes,
+prints "." like all tests from this module do.
+
+    (test-false name expression)
+
+* ```name``` - identifier representing the name of the test
+* ```expression``` - expression to be evaluated
+
+Evaluates the test ```expression``` and checks whether the result is
+```#f``` (false). An exception is raised if it is not with the
+```name``` of the test added to the exception. If the test passes,
+prints "." like all tests from this module do.
+
+    (test-exn name expression)
+
+* ```name``` - identifier representing the name of the test
+* ```expression``` - expression to be evaluated
+
+Evaluates the test ```expression``` and checks whether it raised an
+exception. An exception is raised if no exception was raised during
+the evaluation. If the test passes, prints "." like all tests from
+this module do.
+
 ### Utils
 
 To ensure there are no external dependencies (including chicken eggs),