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require File.expand_path('../spec_helper', __FILE__)
load_extension("hash")
describe "C-API Hash function" do
before :each do
@s = CApiHashSpecs.new
end
describe "rb_hash" do
it "calls #hash on the object" do
obj = mock("rb_hash")
obj.should_receive(:hash).and_return(5)
@s.rb_hash(obj).should == 5
end
ruby_version_is "1.8.7" do
it "converts a Bignum returned by #hash to a Fixnum" do
obj = mock("rb_hash bignum")
obj.should_receive(:hash).and_return(bignum_value())
# The actual conversion is an implementation detail.
# We only care that ultimately we get a Fixnum instance.
@s.rb_hash(obj).should be_an_instance_of(Fixnum)
end
it "calls #to_int to converts a value returned by #hash to a Fixnum" do
obj = mock("rb_hash to_int")
obj.should_receive(:hash).and_return(obj)
obj.should_receive(:to_int).and_return(12)
@s.rb_hash(obj).should == 12
end
it "raises a TypeError if the object does not implement #to_int" do
obj = mock("rb_hash no to_int")
obj.should_receive(:hash).and_return(nil)
lambda { @s.rb_hash(obj) }.should raise_error(TypeError)
end
end
end
describe "rb_hash_new" do
it "returns a new hash" do
@s.rb_hash_new.should == {}
end
it "creates a hash with no default proc" do
@s.rb_hash_new {}.default_proc.should be_nil
end
end
describe "rb_hash_aref" do
it "returns the value associated with the key" do
hsh = {:chunky => 'bacon'}
@s.rb_hash_aref(hsh, :chunky).should == 'bacon'
end
it "returns the default value if it exists" do
hsh = Hash.new(0)
@s.rb_hash_aref(hsh, :chunky).should == 0
@s.rb_hash_aref_nil(hsh, :chunky).should be_false
end
it "returns nil if the key does not exist" do
hsh = { }
@s.rb_hash_aref(hsh, :chunky).should be_nil
@s.rb_hash_aref_nil(hsh, :chunky).should be_true
end
end
describe "rb_hash_aset" do
it "adds the key/value pair and returns the value" do
hsh = {}
@s.rb_hash_aset(hsh, :chunky, 'bacon').should == 'bacon'
hsh.should == {:chunky => 'bacon'}
end
end
describe "rb_hash_delete" do
it "removes the key and returns the value" do
hsh = {:chunky => 'bacon'}
@s.rb_hash_delete(hsh, :chunky).should == 'bacon'
hsh.should == {}
end
end
describe "rb_hash_delete_if" do
it "removes an entry if the block returns true" do
h = { :a => 1, :b => 2, :c => 3 }
@s.rb_hash_delete_if(h) { |k, v| v == 2 }
h.should == { :a => 1, :c => 3 }
end
ruby_version_is ""..."1.8.7" do
it "raises a LocalJumpError when no block is passed" do
lambda { @s.rb_hash_delete_if({:a => 1}) }.should raise_error(LocalJumpError)
end
end
ruby_version_is "1.8.7" do
it "returns an Enumerator when no block is passed" do
@s.rb_hash_delete_if({:a => 1}).should be_an_instance_of(enumerator_class)
end
end
end
describe "rb_hash_foreach" do
it "iterates over the hash" do
hsh = {:name => "Evan", :sign => :libra}
out = @s.rb_hash_foreach(hsh)
out.equal?(hsh).should == false
out.should == hsh
end
it "stops via the callback" do
hsh = {:name => "Evan", :sign => :libra}
out = @s.rb_hash_foreach_stop(hsh)
out.size.should == 1
end
it "deletes via the callback" do
hsh = {:name => "Evan", :sign => :libra}
out = @s.rb_hash_foreach_delete(hsh)
out.should == {:name => "Evan", :sign => :libra}
hsh.should == {}
end
end
# rb_hash_size is a static symbol in MRI
extended_on :rubinius do
describe "rb_hash_size" do
it "returns the size of the hash" do
hsh = {:fast => 'car', :good => 'music'}
@s.rb_hash_size(hsh).should == 2
end
it "returns zero for an empty hash" do
@s.rb_hash_size({}).should == 0
end
end
# TODO: make this shared so it runs on 1.8.7
describe "rb_hash_lookup" do
it "returns the value associated with the key" do
hsh = {:chunky => 'bacon'}
@s.rb_hash_lookup(hsh, :chunky).should == 'bacon'
end
it "does not return the default value if it exists" do
hsh = Hash.new(0)
@s.rb_hash_lookup(hsh, :chunky).should be_nil
@s.rb_hash_lookup_nil(hsh, :chunky).should be_true
end
it "returns nil if the key does not exist" do
hsh = { }
@s.rb_hash_lookup(hsh, :chunky).should be_nil
@s.rb_hash_lookup_nil(hsh, :chunky).should be_true
end
end
end
end
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