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274 lines
7.2 KiB
Ruby
274 lines
7.2 KiB
Ruby
require_relative 'spec_helper'
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require_relative '../../shared/hash/key_error'
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load_extension("hash")
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describe "C-API Hash function" do
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before :each do
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@s = CApiHashSpecs.new
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end
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describe "rb_hash" do
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it "calls #hash on the object" do
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obj = mock("rb_hash")
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obj.should_receive(:hash).and_return(5)
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@s.rb_hash(obj).should == 5
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end
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it "converts a Bignum returned by #hash to a Fixnum" do
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obj = mock("rb_hash bignum")
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obj.should_receive(:hash).and_return(bignum_value)
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# The actual conversion is an implementation detail.
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# We only care that ultimately we get a Fixnum instance.
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@s.rb_hash(obj).should be_an_instance_of(Fixnum)
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end
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it "calls #to_int to converts a value returned by #hash to a Fixnum" do
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obj = mock("rb_hash to_int")
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obj.should_receive(:hash).and_return(obj)
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obj.should_receive(:to_int).and_return(12)
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@s.rb_hash(obj).should == 12
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end
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it "raises a TypeError if the object does not implement #to_int" do
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obj = mock("rb_hash no to_int")
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obj.should_receive(:hash).and_return(nil)
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-> { @s.rb_hash(obj) }.should raise_error(TypeError)
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end
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end
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describe "rb_hash_new" do
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it "returns a new hash" do
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@s.rb_hash_new.should == {}
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end
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it "creates a hash with no default proc" do
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@s.rb_hash_new {}.default_proc.should be_nil
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end
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end
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describe "rb_ident_hash_new" do
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it "returns a new compare by identity hash" do
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result = @s.rb_ident_hash_new
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result.should == {}
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result.compare_by_identity?.should == true
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end
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end
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describe "rb_hash_dup" do
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it "returns a copy of the hash" do
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hsh = {}
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dup = @s.rb_hash_dup(hsh)
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dup.should == hsh
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dup.should_not equal(hsh)
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end
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end
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describe "rb_hash_freeze" do
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it "freezes the hash" do
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@s.rb_hash_freeze({}).frozen?.should be_true
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end
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end
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describe "rb_hash_aref" do
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it "returns the value associated with the key" do
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hsh = {chunky: 'bacon'}
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@s.rb_hash_aref(hsh, :chunky).should == 'bacon'
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end
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it "returns the default value if it exists" do
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hsh = Hash.new(0)
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@s.rb_hash_aref(hsh, :chunky).should == 0
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@s.rb_hash_aref_nil(hsh, :chunky).should be_false
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end
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it "returns nil if the key does not exist" do
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hsh = { }
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@s.rb_hash_aref(hsh, :chunky).should be_nil
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@s.rb_hash_aref_nil(hsh, :chunky).should be_true
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end
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end
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describe "rb_hash_aset" do
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it "adds the key/value pair and returns the value" do
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hsh = {}
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@s.rb_hash_aset(hsh, :chunky, 'bacon').should == 'bacon'
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hsh.should == {chunky: 'bacon'}
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end
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end
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describe "rb_hash_clear" do
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it "returns self that cleared keys and values" do
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hsh = { :key => 'value' }
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@s.rb_hash_clear(hsh).should equal(hsh)
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hsh.should == {}
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end
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end
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describe "rb_hash_delete" do
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it "removes the key and returns the value" do
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hsh = {chunky: 'bacon'}
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@s.rb_hash_delete(hsh, :chunky).should == 'bacon'
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hsh.should == {}
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end
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end
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describe "rb_hash_delete_if" do
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it "removes an entry if the block returns true" do
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h = { a: 1, b: 2, c: 3 }
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@s.rb_hash_delete_if(h) { |k, v| v == 2 }
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h.should == { a: 1, c: 3 }
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end
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it "returns an Enumerator when no block is passed" do
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@s.rb_hash_delete_if({a: 1}).should be_an_instance_of(Enumerator)
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end
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end
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describe "rb_hash_fetch" do
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before :each do
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@hsh = {:a => 1, :b => 2}
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end
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it "returns the value associated with the key" do
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@s.rb_hash_fetch(@hsh, :b).should == 2
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end
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it "raises a KeyError if the key is not found and default is set" do
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@hsh.default = :d
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-> { @s.rb_hash_fetch(@hsh, :c) }.should raise_error(KeyError)
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end
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it "raises a KeyError if the key is not found and no default is set" do
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-> { @s.rb_hash_fetch(@hsh, :c) }.should raise_error(KeyError)
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end
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context "when key is not found" do
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it_behaves_like :key_error, -> obj, key {
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@s.rb_hash_fetch(obj, key)
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}, { a: 1 }
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end
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end
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describe "rb_hash_foreach" do
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it "iterates over the hash" do
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hsh = {name: "Evan", sign: :libra}
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out = @s.rb_hash_foreach(hsh)
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out.equal?(hsh).should == false
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out.should == hsh
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end
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it "stops via the callback" do
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hsh = {name: "Evan", sign: :libra}
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out = @s.rb_hash_foreach_stop(hsh)
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out.size.should == 1
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end
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it "deletes via the callback" do
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hsh = {name: "Evan", sign: :libra}
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out = @s.rb_hash_foreach_delete(hsh)
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out.should == {name: "Evan", sign: :libra}
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hsh.should == {}
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end
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end
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describe "rb_hash_size" do
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it "returns the size of the hash" do
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hsh = {fast: 'car', good: 'music'}
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@s.rb_hash_size(hsh).should == 2
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end
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it "returns zero for an empty hash" do
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@s.rb_hash_size({}).should == 0
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end
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end
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describe "rb_hash_lookup" do
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it "returns the value associated with the key" do
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hsh = {chunky: 'bacon'}
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@s.rb_hash_lookup(hsh, :chunky).should == 'bacon'
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end
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it "does not return the default value if it exists" do
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hsh = Hash.new(0)
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@s.rb_hash_lookup(hsh, :chunky).should be_nil
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@s.rb_hash_lookup_nil(hsh, :chunky).should be_true
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end
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it "returns nil if the key does not exist" do
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hsh = { }
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@s.rb_hash_lookup(hsh, :chunky).should be_nil
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@s.rb_hash_lookup_nil(hsh, :chunky).should be_true
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end
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describe "rb_hash_lookup2" do
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it "returns the value associated with the key" do
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hash = {chunky: 'bacon'}
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@s.rb_hash_lookup2(hash, :chunky, nil).should == 'bacon'
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end
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it "returns the default value if the key does not exist" do
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hash = {}
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@s.rb_hash_lookup2(hash, :chunky, 10).should == 10
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end
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it "returns undefined if that is the default value specified" do
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hsh = Hash.new(0)
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@s.rb_hash_lookup2_default_undef(hsh, :chunky).should be_true
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end
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end
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end
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describe "rb_hash_set_ifnone" do
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it "sets the default value of non existing keys" do
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hash = {}
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@s.rb_hash_set_ifnone(hash, 10)
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hash[:chunky].should == 10
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end
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end
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describe "rb_Hash" do
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it "returns an empty hash when the argument is nil" do
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@s.rb_Hash(nil).should == {}
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end
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it "returns an empty hash when the argument is []" do
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@s.rb_Hash([]).should == {}
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end
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it "tries to convert the passed argument to a hash by calling #to_hash" do
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h = BasicObject.new
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def h.to_hash; {"bar" => "foo"}; end
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@s.rb_Hash(h).should == {"bar" => "foo"}
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end
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it "raises a TypeError if the argument does not respond to #to_hash" do
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-> { @s.rb_Hash(42) }.should raise_error(TypeError)
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end
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it "raises a TypeError if #to_hash does not return a hash" do
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h = BasicObject.new
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def h.to_hash; 42; end
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-> { @s.rb_Hash(h) }.should raise_error(TypeError)
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end
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end
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describe "hash code functions" do
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it "computes a deterministic number" do
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hash_code = @s.compute_a_hash_code(53)
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hash_code.should be_an_instance_of(Integer)
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hash_code.should == @s.compute_a_hash_code(53)
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@s.compute_a_hash_code(90).should == @s.compute_a_hash_code(90)
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end
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end
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end
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