method
assert
ruby latest stable - Class:
Test::Unit::Assertions
assert(test, *msgs)public
Tests if test is true.
msg may be a String or a Proc. If msg is a String, it will be used as the failure message. Otherwise, the result of calling msg will be used as the message if the assertion fails.
If no msg is given, a default message will be used.
assert(false, "This was expected to be true")
1Note
Use message param
The +message+ param is invaluable in case test fails -- if you use it to display relevant info, you will find out what went wrong much faster.
Reworking the silly example above:
assert some_list.include?(5)
will only tell you that
<false> is not true.
which isn't terribly helpful, is it? But if you use +message+ like that:
assert some_list.include?(5), "some_list = #{some_list.inspect}"
the output will be:
some_list = [1, 2].
<false> is not true.
which in most cases should give you strong hints as to why the test failed.