Ruby latest stable (v2_5_5) - 1 note - Class: Test::Unit::Assertions

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2_1_10) is shown here.

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")
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March 11, 2010
0 thanks

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.