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Contents
module Spec
module Matchers
class ThrowSymbol #:nodoc:
def initialize(expected=nil)
@expected = expected
end
def matches?(proc)
begin
proc.call
rescue NameError => e
@actual = extract_sym_from_name_error(e)
ensure
if @expected.nil?
return @actual.nil? ? false : true
else
return @actual == @expected
end
end
end
def failure_message
if @actual
"expected #{expected}, got #{@actual.inspect}"
else
"expected #{expected} but nothing was thrown"
end
end
def negative_failure_message
if @expected
"expected #{expected} not to be thrown"
else
"expected no Symbol, got :#{@actual}"
end
end
def description
"throw #{expected}"
end
private
def expected
@expected.nil? ? "a Symbol" : @expected.inspect
end
def extract_sym_from_name_error(error)
return "#{error.message.split("`").last.split("'").first}".to_sym
end
end
# :call-seq:
# should throw_symbol()
# should throw_symbol(:sym)
# should_not throw_symbol()
# should_not throw_symbol(:sym)
#
# Given a Symbol argument, matches if a proc throws the specified Symbol.
#
# Given no argument, matches if a proc throws any Symbol.
#
# == Examples
#
# lambda { do_something_risky }.should throw_symbol
# lambda { do_something_risky }.should throw_symbol(:that_was_risky)
#
# lambda { do_something_risky }.should_not throw_symbol
# lambda { do_something_risky }.should_not throw_symbol(:that_was_risky)
def throw_symbol(sym=nil)
Matchers::ThrowSymbol.new(sym)
end
end
end
Version data entries
14 entries across 14 versions & 3 rubygems