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require 'multi_test/minitest_world'
module MultiTest
class AssertionLibrary
def self.detect_best
available.detect(&:require?)
end
def initialize(requirer, extender)
@requirer = requirer
@extender = extender
end
def require?
begin
@requirer.call
true
rescue LoadError
false
end
end
def extend_world(world)
@extender.call(world)
end
private
def self.null
AssertionLibrary.new(
proc { },
proc { }
)
end
def self.available
@available ||= [
AssertionLibrary.new(
proc { require 'rspec/expectations' },
proc { |object| object.extend(::RSpec::Matchers) }
),
AssertionLibrary.new(
proc {
require 'spec/expectations'
require 'spec/runner/differs/default'
require 'ostruct'
},
proc { |object|
options = OpenStruct.new(:diff_format => :unified, :context_lines => 3)
Spec::Expectations.differ = Spec::Expectations::Differs::Default.new(options)
object.extend(Spec::Matchers)
}
),
AssertionLibrary.new(
proc { require 'minitest/assertions' },
proc { |object| object.extend(MinitestWorld) }
),
AssertionLibrary.new(
proc { require 'minitest/unit' },
proc { |object| object.extend(MiniTest::Assertions) }
),
AssertionLibrary.new(
proc { require 'test/unit/assertions' },
proc { |object| object.extend(Test::Unit::Assertions) }
),
# Null assertion library must come last to prevent exceptions if
# unable to load a test framework
AssertionLibrary.null
]
end
end
end
|
