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require_relative 'spec_helper'
require_relative 'fixtures/proc'
load_extension("proc")
describe "C-API Proc function" do
before :each do
@p = CApiProcSpecs.new
@prc = @p.rb_proc_new
end
describe "rb_proc_new" do
it "returns a new valid Proc" do
@prc.kind_of?(Proc).should == true
end
it "calls the C function wrapped by the Proc instance when sent #call" do
@prc.call(:foo_bar).should == ":foo_bar"
@prc.call([:foo, :bar]).should == "[:foo, :bar]"
end
it "calls the C function wrapped by the Proc instance when sent #[]" do
@prc[:foo_bar].should == ":foo_bar"
@prc[[:foo, :bar]].should == "[:foo, :bar]"
end
it "returns a Proc instance correctly described in #inspect without source location" do
@prc.inspect.should =~ /^#<Proc:([^ :@]*?)>$/
end
it "returns a Proc instance with #arity == -1" do
@prc.arity.should == -1
end
it "shouldn't be equal to another one" do
@prc.should_not == @p.rb_proc_new
end
it "returns a Proc instance with #source_location == nil" do
@prc.source_location.should == nil
end
end
describe "rb_proc_arity" do
it "returns the correct arity" do
prc = Proc.new {|a,b,c|}
@p.rb_proc_arity(prc).should == 3
end
end
describe "rb_proc_call" do
it "calls the Proc" do
prc = Proc.new {|a,b| a * b }
@p.rb_proc_call(prc, [6, 7]).should == 42
end
end
end
describe "C-API when calling Proc.new from a C function" do
before :each do
@p = CApiProcSpecs.new
end
# In the scenarios below: X -> Y means execution context X called to Y.
# For example: Ruby -> C means a Ruby code called a C function.
#
# X -> Y <- X -> Z means execution context X called Y which returned to X,
# then X called Z.
# For example: C -> Ruby <- C -> Ruby means a C function called into Ruby
# code which returned to C, then C called into Ruby code again.
# Ruby -> C -> rb_funcall(Proc.new)
it "returns the Proc passed by the Ruby code calling the C function" do
prc = @p.rb_Proc_new(0) { :called }
prc.call.should == :called
end
# Ruby -> C -> Ruby <- C -> rb_funcall(Proc.new)
it "returns the Proc passed to the Ruby method when the C function calls other Ruby methods before calling Proc.new" do
prc = @p.rb_Proc_new(1) { :called }
prc.call.should == :called
end
# Ruby -> C -> Ruby -> Proc.new
it "raises an ArgumentError when the C function calls a Ruby method that calls Proc.new" do
def @p.Proc_new() Proc.new end
lambda { @p.rb_Proc_new(2) { :called } }.should raise_error(ArgumentError)
end
# Ruby -> C -> Ruby -> C -> rb_funcall(Proc.new)
it "raises an ArgumentError when the C function calls a Ruby method and that method calls a C function that calls Proc.new" do
def @p.redispatch() rb_Proc_new(0) end
lambda { @p.rb_Proc_new(3) { :called } }.should raise_error(ArgumentError)
end
# Ruby -> C -> Ruby -> C (with new block) -> rb_funcall(Proc.new)
it "returns the most recent Proc passed when the Ruby method called the C function" do
prc = @p.rb_Proc_new(4) { :called }
prc.call.should == :calling_with_block
end
# Ruby -> C -> Ruby -> C (with new block) <- Ruby <- C -> # rb_funcall(Proc.new)
it "returns the Proc passed from the original Ruby call to the C function" do
prc = @p.rb_Proc_new(5) { :called }
prc.call.should == :called
end
# Ruby -> C -> Ruby -> block_given?
it "returns false from block_given? in a Ruby method called by the C function" do
@p.rb_Proc_new(6).should be_false
end
end
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