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# coding: utf-8
# Copyright 2019 DragonRuby LLC
# MIT License
# assert.rb has been released under MIT (*only this file*).
module GTK
=begin
This is a tiny assertion api for the unit testing portion of Game Toolkit.
@example
1. Create a file called tests.rb under mygame.
2. Any method that begins with the word test_ will be considered a test.
def test_this_works args, assert
assert.equal! 1, 1
end
3. To run a test, save the file while the game is running.
@example
To add an assertion open up this class and write:
class Assert
def custom_assertion actual, expected, message = nil
# this tell Game Toolkit that an assertion was performed (so that the test isn't marked inconclusive).
@assertion_performed = true
# perform your custom logic here and rais an exception to denote a failure.
raise "Some Error. #{message}."
end
end
=end
class Assert
attr :assertion_performed
=begin
Us this if you are throwing your own exceptions and you want to mark the tests as ran (so that it wont be marked as inconclusive).
=end
def ok!
@assertion_performed = true
end
=begin
Assert if a value is a thruthy value. All assert method take an optional final parameter that is the message to display to the user.
@example
def test_does_this_work args, assert
some_result = Person.new
assert.true! some_result
# OR
assert.true! some_result, "Person was not created."
end
=end
def true! value, message = nil
@assertion_performed = true
if !value
message = "#{value} was not truthy.\n#{message}"
raise "#{message}"
end
nil
end
=begin
Assert if a value is a falsey value.
@example
def test_does_this_work args, assert
some_result = nil
assert.false! some_result
end
=end
def false! value, message = nil
@assertion_performed = true
if value
message = "#{value} was not falsey.\n#{message}"
raise message
end
nil
end
=begin
Assert if two values are equal.
@example
def test_does_this_work args, assert
a = 1
b = 1
assert.equal! a, b
end
=end
def equal! actual, expected, message = nil
@assertion_performed = true
if actual != expected
actual_string = "#{actual}#{actual.nil? ? " (nil) " : " " }".strip
message = "actual:\n#{actual_string} did not equal\nexpected:\n#{expected}.\n#{message}"
raise message
end
nil
end
=begin
Assert if a value is explicitly nil (not false).
@example
def test_does_this_work args, assert
a = nil
b = false
assert.nil! a # this will pass
assert.nil! b # this will throw an exception.
end
=end
def nil! value, message = nil
@assertion_performed = true
if !value.nil?
message = "#{value} was supposed to be nil, but wasn't.\n#{message}"
raise message
end
nil
end
end
end
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