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Ruby Ruby Foundations Testing MiniTest::Spec

Posted by Jim Withington
Jim Withington
12,025 Points

MiniTest::Spec Uninitialized Constant Error

Hello!

In the MiniTest::Spec video, this code (within some other code, mind you) is used to demonstrate must_be_instance_of:

it "must be a FixNum" do
    (2+2).must_be_instance_of FixNum
end

In the video it passes, but when I run it, I keep getting an error that says:

 1) Error:
MyTests#test_0003_must be a FixNum:
NameError: uninitialized constant FixNum
    2-spec.rb:14:in `block (2 levels) in <main>'

Any idea what might be causing this? Is this a version thing, where maybe my newer version of MiniTest::Spec returns a different kind of error?

1 Answer

Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points
Maciej Czuchnowski
Maciej Czuchnowski
36,441 Points

Try Fixnum instead of FixNum. It's all case-sensitive and the video uses lower-case N.

Jim Withington
Jim Withington
12,025 Points

Fantastic catch! Thank you! Working now. :grinning: