1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
ruby--ruby/spec/ruby/core/method/arity_spec.rb

223 lines
4.7 KiB
Ruby
Raw Normal View History

require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Method#arity" do
SpecEvaluate.desc = "for method definition"
context "returns zero" do
evaluate <<-ruby do
def m() end
ruby
method(:m).arity.should == 0
end
evaluate <<-ruby do
def n(&b) end
ruby
method(:n).arity.should == 0
end
end
context "returns positive values" do
evaluate <<-ruby do
def m(a) end
def n(a, b) end
def o(a, b, c) end
def p(a, b, c, d) end
ruby
method(:m).arity.should == 1
method(:n).arity.should == 2
method(:o).arity.should == 3
method(:p).arity.should == 4
end
evaluate <<-ruby do
def m(a:) end
def n(a:, b:) end
def o(a: 1, b:, c:, d: 2) end
ruby
method(:m).arity.should == 1
method(:n).arity.should == 1
method(:o).arity.should == 1
end
evaluate <<-ruby do
def m(a, b:) end
def n(a, b:, &l) end
ruby
method(:m).arity.should == 2
method(:n).arity.should == 2
end
evaluate <<-ruby do
def m(a, b, c:, d: 1) end
def n(a, b, c:, d: 1, **k, &l) end
ruby
method(:m).arity.should == 3
method(:n).arity.should == 3
end
end
context "returns negative values" do
evaluate <<-ruby do
def m(a=1) end
def n(a=1, b=2) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
end
evaluate <<-ruby do
def m(a, b=1) end
def n(a, b, c=1, d=2) end
ruby
method(:m).arity.should == -2
method(:n).arity.should == -3
end
evaluate <<-ruby do
def m(a=1, *b) end
def n(a=1, b=2, *c) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
end
evaluate <<-ruby do
def m(*) end
def n(*a) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
end
evaluate <<-ruby do
def m(a, *) end
def n(a, *b) end
def o(a, b, *c) end
def p(a, b, c, *d) end
ruby
method(:m).arity.should == -2
method(:n).arity.should == -2
method(:o).arity.should == -3
method(:p).arity.should == -4
end
evaluate <<-ruby do
def m(*a, b) end
def n(*a, b, c) end
def o(*a, b, c, d) end
ruby
method(:m).arity.should == -2
method(:n).arity.should == -3
method(:o).arity.should == -4
end
evaluate <<-ruby do
def m(a, *b, c) end
def n(a, b, *c, d, e) end
ruby
method(:m).arity.should == -3
method(:n).arity.should == -5
end
evaluate <<-ruby do
def m(a, b=1, c=2, *d, e, f) end
def n(a, b, c=1, *d, e, f, g) end
ruby
method(:m).arity.should == -4
method(:n).arity.should == -6
end
evaluate <<-ruby do
def m(a: 1) end
def n(a: 1, b: 2) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
end
evaluate <<-ruby do
def m(a=1, b: 2) end
def n(*a, b: 1) end
def o(a=1, b: 2) end
def p(a=1, *b, c: 2, &l) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
method(:o).arity.should == -1
method(:p).arity.should == -1
end
evaluate <<-ruby do
def m(**k, &l) end
def n(*a, **k) end
def o(a: 1, b: 2, **k) end
ruby
method(:m).arity.should == -1
method(:n).arity.should == -1
method(:o).arity.should == -1
end
evaluate <<-ruby do
def m(a=1, *b, c:, d: 2, **k, &l) end
ruby
method(:m).arity.should == -2
end
evaluate <<-ruby do
def m(a, b=1, *c, d, e:, f: 2, **k, &l) end
def n(a, b=1, *c, d:, e:, f: 2, **k, &l) end
def o(a=0, b=1, *c, d, e:, f: 2, **k, &l) end
def p(a=0, b=1, *c, d:, e:, f: 2, **k, &l) end
ruby
method(:m).arity.should == -4
method(:n).arity.should == -3
method(:o).arity.should == -3
method(:p).arity.should == -2
end
end
context "for a Method generated by respond_to_missing?" do
it "returns -1" do
obj = mock("method arity respond_to_missing")
obj.should_receive(:respond_to_missing?).and_return(true)
obj.method(:m).arity.should == -1
end
end
context "for a Method generated by attr_reader" do
it "return 0" do
obj = MethodSpecs::Methods.new
obj.method(:reader).arity.should == 0
end
end
context "for a Method generated by attr_writer" do
it "returns 1" do
obj = MethodSpecs::Methods.new
obj.method(:writer=).arity.should == 1
end
end
end