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describe :hash_eql, :shared => true do
it "does not compare values when keys don't match" do
value = mock('x')
value.should_not_receive(:==)
value.should_not_receive(:eql?)
new_hash(1 => value).send(@method, new_hash(2 => value)).should be_false
end
it "returns false when the numbers of keys differ without comparing any elements" do
obj = mock('x')
h = new_hash(obj => obj)
obj.should_not_receive(:==)
obj.should_not_receive(:eql?)
new_hash.send(@method, h).should be_false
h.send(@method, new_hash).should be_false
end
it "first compares keys via hash" do
x = mock('x')
x.should_receive(:hash).any_number_of_times.and_return(0)
y = mock('y')
y.should_receive(:hash).any_number_of_times.and_return(0)
new_hash(x => 1).send(@method, new_hash(y => 1)).should be_false
end
it "does not compare keys with different hash codes via eql?" do
x = mock('x')
y = mock('y')
x.should_not_receive(:eql?)
y.should_not_receive(:eql?)
x.should_receive(:hash).any_number_of_times.and_return(0)
y.should_receive(:hash).any_number_of_times.and_return(1)
new_hash(x => 1).send(@method, new_hash(y => 1)).should be_false
end
it "computes equality for recursive hashes" do
h = new_hash
h[:a] = h
h.send(@method, h[:a]).should be_true
(h == h[:a]).should be_true
end
it "doesn't call to_hash on objects" do
mock_hash = mock("fake hash")
def mock_hash.to_hash() new_hash end
new_hash.send(@method, mock_hash).should be_false
end
ruby_bug "redmine #2448", "1.9.1" do
it "computes equality for complex recursive hashes" do
a, b = {}, {}
a.merge! :self => a, :other => b
b.merge! :self => b, :other => a
a.send(@method, b).should be_true # they both have the same structure!
c = {}
c.merge! :other => c, :self => c
c.send(@method, a).should be_true # subtle, but they both have the same structure!
a[:delta] = c[:delta] = a
c.send(@method, a).should be_false # not quite the same structure, as a[:other][:delta] = nil
c[:delta] = 42
c.send(@method, a).should be_false
a[:delta] = 42
c.send(@method, a).should be_false
b[:delta] = 42
c.send(@method, a).should be_true
end
it "computes equality for recursive hashes & arrays" do
x, y, z = [], [], []
a, b, c = {:foo => x, :bar => 42}, {:foo => y, :bar => 42}, {:foo => z, :bar => 42}
x << a
y << c
z << b
b.send(@method, c).should be_true # they clearly have the same structure!
y.send(@method, z).should be_true
a.send(@method, b).should be_true # subtle, but they both have the same structure!
x.send(@method, y).should be_true
y << x
y.send(@method, z).should be_false
z << x
y.send(@method, z).should be_true
a[:foo], a[:bar] = a[:bar], a[:foo]
a.send(@method, b).should be_false
b[:bar] = b[:foo]
b.send(@method, c).should be_false
end
end # ruby_bug
end
# All these tests are true for ==, and for eql? when Ruby >= 1.8.7
describe :hash_eql_additional, :shared => true do
it "compares values when keys match" do
x = mock('x')
y = mock('y')
def x.==(o) false end
def y.==(o) false end
def x.eql?(o) false end
def y.eql?(o) false end
new_hash(1 => x).send(@method, new_hash(1 => y)).should be_false
x = mock('x')
y = mock('y')
def x.==(o) true end
def y.==(o) true end
def x.eql?(o) true end
def y.eql?(o) true end
new_hash(1 => x).send(@method, new_hash(1 => y)).should be_true
end
it "compares keys with eql? semantics" do
new_hash(1.0 => "x").send(@method, new_hash(1.0 => "x")).should be_true
new_hash(1.0 => "x").send(@method, new_hash(1.0 => "x")).should be_true
new_hash(1 => "x").send(@method, new_hash(1.0 => "x")).should be_false
new_hash(1.0 => "x").send(@method, new_hash(1 => "x")).should be_false
end
it "returns true iff other Hash has the same number of keys and each key-value pair matches" do
a = new_hash(:a => 5)
b = new_hash
a.send(@method, b).should be_false
b[:a] = 5
a.send(@method, b).should be_true
c = new_hash("a" => 5)
a.send(@method, c).should be_false
end
it "does not call to_hash on hash subclasses" do
new_hash(5 => 6).send(@method, HashSpecs::ToHashHash[5 => 6]).should be_true
end
it "ignores hash class differences" do
h = new_hash(1 => 2, 3 => 4)
HashSpecs::MyHash[h].send(@method, h).should be_true
HashSpecs::MyHash[h].send(@method, HashSpecs::MyHash[h]).should be_true
h.send(@method, HashSpecs::MyHash[h]).should be_true
end
# Why isn't this true of eql? too ?
it "compares keys with matching hash codes via eql?" do
# Can't use should_receive because it uses hash and eql? internally
a = Array.new(2) do
obj = mock('0')
def obj.hash()
return 0
end
# It's undefined whether the impl does a[0].eql?(a[1]) or
# a[1].eql?(a[0]) so we taint both.
def obj.eql?(o)
return true if self == o
taint
o.taint
false
end
obj
end
new_hash(a[0] => 1).send(@method, new_hash(a[1] => 1)).should be_false
a[0].tainted?.should be_true
a[1].tainted?.should be_true
a = Array.new(2) do
obj = mock('0')
def obj.hash()
# It's undefined whether the impl does a[0].send(@method, a[1]) or
# a[1].send(@method, a[0]) so we taint both.
def self.eql?(o) taint; o.taint; true; end
return 0
end
obj
end
new_hash(a[0] => 1).send(@method, new_hash(a[1] => 1)).should be_true
a[0].tainted?.should be_true
a[1].tainted?.should be_true
end
# The specs above all pass in 1.8.6p287 for Hash#== but not Hash#eql
# except this one, which does not pass for Hash#==.
ruby_version_is "1.8.7" do
it "compares the values in self to values in other hash" do
l_val = mock("left")
r_val = mock("right")
l_val.should_receive(:eql?).with(r_val).and_return(true)
new_hash(1 => l_val).eql?(new_hash(1 => r_val)).should be_true
end
end
end
describe :hash_eql_additional_more, :shared => true do
it "returns true if other Hash has the same number of keys and each key-value pair matches, even though the default-value are not same" do
new_hash(5).send(@method, new_hash(1)).should be_true
new_hash {|h, k| 1}.send(@method, new_hash {}).should be_true
new_hash {|h, k| 1}.send(@method, new_hash(2)).should be_true
d = new_hash {|h, k| 1}
e = new_hash {}
d[1] = 2
e[1] = 2
d.send(@method, e).should be_true
end
end
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