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require 'rspec/matchers/fail_matchers'
RSpec::Matchers.define :include_method do |expected|
match do |actual|
actual.map { |m| m.to_s }.include?(expected.to_s)
end
end
RSpec::Matchers.define :custom_include do |*args|
match { |actual| expect(actual).to include(*args) }
end
RSpec::Matchers.define :be_a_clone_of do |expected|
match do |actual|
!actual.equal?(expected) &&
actual.class.equal?(expected.class) &&
state_of(actual) == state_of(expected)
end
def state_of(object)
ivar_names = object.instance_variables
Hash[ivar_names.map { |n| [n, object.instance_variable_get(n)] }]
end
end
RSpec::Matchers.define :have_string_length do |expected|
match do |actual|
@actual = actual
string_length == expected
end
def string_length
@string_length ||= @actual.length
end
end
RSpec.configure do |config|
config.include RSpec::Matchers::FailMatchers
end
RSpec::Matchers.define_negated_matcher :a_string_excluding, :a_string_including
RSpec::Matchers.define_negated_matcher :a_string_not_matching, :match
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