require_relative 'spec_helper' require_relative '../../shared/hash/key_error' 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 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.between?(fixnum_min, fixnum_max) 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) -> { @s.rb_hash(obj) }.should raise_error(TypeError) 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_ident_hash_new" do it "returns a new compare by identity hash" do result = @s.rb_ident_hash_new result.should == {} result.compare_by_identity?.should == true end end describe "rb_hash_dup" do it "returns a copy of the hash" do hsh = {} dup = @s.rb_hash_dup(hsh) dup.should == hsh dup.should_not equal(hsh) end end describe "rb_hash_freeze" do it "freezes the hash" do @s.rb_hash_freeze({}).frozen?.should be_true 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_clear" do it "returns self that cleared keys and values" do hsh = { :key => 'value' } @s.rb_hash_clear(hsh).should equal(hsh) hsh.should == {} 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 it "returns an Enumerator when no block is passed" do @s.rb_hash_delete_if({a: 1}).should be_an_instance_of(Enumerator) end end describe "rb_hash_fetch" do before :each do @hsh = {:a => 1, :b => 2} end it "returns the value associated with the key" do @s.rb_hash_fetch(@hsh, :b).should == 2 end it "raises a KeyError if the key is not found and default is set" do @hsh.default = :d -> { @s.rb_hash_fetch(@hsh, :c) }.should raise_error(KeyError) end it "raises a KeyError if the key is not found and no default is set" do -> { @s.rb_hash_fetch(@hsh, :c) }.should raise_error(KeyError) end context "when key is not found" do it_behaves_like :key_error, -> obj, key { @s.rb_hash_fetch(obj, key) }, { a: 1 } 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 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 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 describe "rb_hash_lookup2" do it "returns the value associated with the key" do hash = {chunky: 'bacon'} @s.rb_hash_lookup2(hash, :chunky, nil).should == 'bacon' end it "returns the default value if the key does not exist" do hash = {} @s.rb_hash_lookup2(hash, :chunky, 10).should == 10 end it "returns undefined if that is the default value specified" do hsh = Hash.new(0) @s.rb_hash_lookup2_default_undef(hsh, :chunky).should be_true end end end describe "rb_hash_set_ifnone" do it "sets the default value of non existing keys" do hash = {} @s.rb_hash_set_ifnone(hash, 10) hash[:chunky].should == 10 end end describe "rb_Hash" do it "returns an empty hash when the argument is nil" do @s.rb_Hash(nil).should == {} end it "returns an empty hash when the argument is []" do @s.rb_Hash([]).should == {} end it "tries to convert the passed argument to a hash by calling #to_hash" do h = BasicObject.new def h.to_hash; {"bar" => "foo"}; end @s.rb_Hash(h).should == {"bar" => "foo"} end it "raises a TypeError if the argument does not respond to #to_hash" do -> { @s.rb_Hash(42) }.should raise_error(TypeError) end it "raises a TypeError if #to_hash does not return a hash" do h = BasicObject.new def h.to_hash; 42; end -> { @s.rb_Hash(h) }.should raise_error(TypeError) end end describe "hash code functions" do it "computes a deterministic number" do hash_code = @s.compute_a_hash_code(53) hash_code.should be_an_instance_of(Integer) hash_code.should == @s.compute_a_hash_code(53) @s.compute_a_hash_code(90).should == @s.compute_a_hash_code(90) end end end