Assertion Purpose
assert( boolean, [msg] ) Ensures that the object/expression is true.
assert_equal( obj1, obj2, [msg] ) Ensures that obj1 == obj2 is true.
assert_not_equal( obj1, obj2, [msg] ) Ensures that obj1 == obj2 is false.
assert_same( obj1, obj2, [msg] ) Ensures that obj1.equal?(obj2) is true.
assert_not_same( obj1, obj2, [msg] ) Ensures that obj1.equal?(obj2) is false.
assert_nil( obj, [msg] ) Ensures that obj.nil? is true.
assert_not_nil( obj, [msg] ) Ensures that obj.nil? is false.
assert_match( regexp, string, [msg] ) Ensures that a string matches the regular
expression.
assert_no_match( regexp, string, [msg] ) Ensures that a string does not match
the regular expression.
assert_in_delta( expecting, actual, delta, [msg] ) Ensures that the numbers
expecting and actual are within delta of each other.
assert_throws( symbol, [msg] ) { block } Ensures that the given block throws the
symbol.
assert_raise( exception1, exception2, ... ) { block } Ensures that the given
block raises one of the given exceptions.
assert_nothing_raised( exception1, exception2, ... ) { block } Ensures that the
given block does not raise one of the given exceptions.
assert_instance_of( class, obj, [msg] ) Ensures that obj is of the class type.
assert_kind_of( class, obj, [msg] ) Ensures that obj is or descends from class.
assert_respond_to( obj, symbol, [msg] ) Ensures that obj has a method called
symbol.
assert_operator( obj1, operator, obj2, [msg] ) Ensures that obj1.operator(obj2)
is true.
assert_send( array, [msg] ) Ensures that executing the method listed in array[1]
on the object in array[0] with the parameters of array[2 and up] is true. This
one is weird eh?
flunk( [msg] ) Ensures failure. This is useful to explicitly mark a test that
isn’t finished yet.
