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Contents
def ArgumentError.message(default_text, *args)
msg = args.first.is_a?(String) ? args.shift : default_text
case args.length
when 0 then msg
when 1 then "#{msg}: #{args.first.inspect}"
else "#{msg}: #{args.inspect}"
end
end
class InvalidArgument < ArgumentError
def initialize(*args)
super ArgumentError.message("Invalid argument", *args)
end
end
def invalid_argument!(*args)
raise InvalidArgument.new(*args)
end
class MissingOptions < ArgumentError
def initialize(*args)
super ArgumentError.message("Missing options", *args)
end
end
def missing_options!(*args)
raise MissingOptions.new(*args)
end
class MissingImplementation < ArgumentError
def initialize(*args)
super ArgumentError.message("Missing options", *args)
end
end
class Module
def not_implemented(*args)
class_eval args.map { |arg| "def #{arg}(*args); not_implemented!; end\n" }.join
end
end
class Object
def not_implemented!
raise MissingImplementation.new "#{self.class}##{caller_method_name}"
end
private
def caller_method_name
parse_caller(caller(2).first).last || "unknown"
end
def parse_caller(at)
if /^(.+?):(\d+)(?::in `(.*)')?/ =~ at
file = Regexp.last_match[1]
line = Regexp.last_match[2].to_i
method = Regexp.last_match[3]
[file, line, method]
end
end
end
module Module::Etest
class X
not_implemented :a, :b
def c(x)
invalid_argument! "This is strange" unless x == 0
end
def d(x)
missing_options! :a, :b unless x.keys?(:a, :b)
end
end
def test_missing
assert_raise(MissingImplementation) { X.new.a }
assert_raise(MissingImplementation) { X.new.a 1, 2 }
end
def test_missing_options
assert_raises_kind_of(ArgumentError) {
X.new.d :a => "b", :c => "d"
}
end
def test_invalid_argument
assert_raises_kind_of(ArgumentError) {
X.new.c 1
}
assert_nothing_raised {
X.new.c 0
}
end
end if VEX_TEST == "base"
Version data entries
8 entries across 8 versions & 1 rubygems