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1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
95 lines
3.7 KiB
Ruby
95 lines
3.7 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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describe "Proc#parameters" do
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it "returns an empty Array for a proc expecting no parameters" do
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proc {}.parameters.should == []
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end
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it "returns an Array of Arrays for a proc expecting parameters" do
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p = proc {|x| }
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p.parameters.should be_an_instance_of(Array)
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p.parameters.first.should be_an_instance_of(Array)
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end
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it "sets the first element of each sub-Array to :opt for optional arguments" do
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proc {|x| }.parameters.first.first.should == :opt
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proc {|y,*x| }.parameters.first.first.should == :opt
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end
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it "regards named parameters in procs as optional" do
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proc {|x| }.parameters.first.first.should == :opt
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end
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it "regards optional keyword parameters in procs as optional" do
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proc {|x: :y| }.parameters.first.first.should == :key
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end
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it "regards parameters with default values as optional" do
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lambda {|x=1| }.parameters.first.first.should == :opt
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proc {|x=1| }.parameters.first.first.should == :opt
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end
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it "sets the first element of each sub-Array to :req for required arguments" do
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lambda {|x,y=[]| }.parameters.first.first.should == :req
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lambda {|y,*x| }.parameters.first.first.should == :req
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end
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it "regards named parameters in lambdas as required" do
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lambda {|x| }.parameters.first.first.should == :req
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end
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it "regards keyword parameters in lambdas as required" do
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eval("lambda {|x:| }").parameters.first.first.should == :keyreq
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end
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it "sets the first element of each sub-Array to :rest for parameters prefixed with asterisks" do
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lambda {|*x| }.parameters.first.first.should == :rest
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lambda {|x,*y| }.parameters.last.first.should == :rest
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proc {|*x| }.parameters.first.first.should == :rest
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proc {|x,*y| }.parameters.last.first.should == :rest
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end
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it "sets the first element of each sub-Array to :keyrest for parameters prefixed with double asterisks" do
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lambda {|**x| }.parameters.first.first.should == :keyrest
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lambda {|x,**y| }.parameters.last.first.should == :keyrest
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proc {|**x| }.parameters.first.first.should == :keyrest
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proc {|x,**y| }.parameters.last.first.should == :keyrest
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end
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it "sets the first element of each sub-Array to :block for parameters prefixed with ampersands" do
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lambda {|&x| }.parameters.first.first.should == :block
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lambda {|x,&y| }.parameters.last.first.should == :block
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proc {|&x| }.parameters.first.first.should == :block
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proc {|x,&y| }.parameters.last.first.should == :block
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end
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it "sets the second element of each sub-Array to the name of the argument" do
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lambda {|x| }.parameters.first.last.should == :x
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lambda {|x=Math::PI| }.parameters.first.last.should == :x
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lambda {|an_argument, glark, &foo| }.parameters[1].last.should == :glark
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lambda {|*rest| }.parameters.first.last.should == :rest
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lambda {|&block| }.parameters.first.last.should == :block
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proc {|x| }.parameters.first.last.should == :x
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proc {|x=Math::PI| }.parameters.first.last.should == :x
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proc {|an_argument, glark, &foo| }.parameters[1].last.should == :glark
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proc {|*rest| }.parameters.first.last.should == :rest
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proc {|&block| }.parameters.first.last.should == :block
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end
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it "ignores unnamed rest args" do
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lambda {|x,|}.parameters.should == [[:req, :x]]
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end
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it "adds nameless rest arg for \"star\" argument" do
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lambda {|x,*|}.parameters.should == [[:req, :x], [:rest]]
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end
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it "does not add locals as block options with a block and splat" do
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lambda do |*args, &blk|
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local_is_not_parameter = {}
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end.parameters.should == [[:rest, :args], [:block, :blk]]
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proc do |*args, &blk|
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local_is_not_parameter = {}
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end.parameters.should == [[:rest, :args], [:block, :blk]]
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end
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end
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