describe :hash_update, shared: true do
it "adds the entries from other, overwriting duplicate keys. Returns self" do
h = { _1: 'a', _2: '3' }
h.send(@method, _1: '9', _9: 2).should equal(h)
h.should == { _1: "9", _2: "3", _9: 2 }
end
it "sets any duplicate key to the value of block if passed a block" do
h1 = { a: 2, b: -1 }
h2 = { a: -2, c: 1 }
h1.send(@method, h2) { |k,x,y| 3.14 }.should equal(h1)
h1.should == { c: 1, b: -1, a: 3.14 }
h1.send(@method, h1) { nil }
h1.should == { a: nil, b: nil, c: nil }
end
it "tries to convert the passed argument to a hash using #to_hash" do
obj = mock('{1=>2}')
obj.should_receive(:to_hash).and_return({ 1 => 2 })
{ 3 => 4 }.send(@method, obj).should == { 1 => 2, 3 => 4 }
end
it "does not call to_hash on hash subclasses" do
{ 3 => 4 }.send(@method, HashSpecs::ToHashHash[1 => 2]).should == { 1 => 2, 3 => 4 }
end
it "processes entries with same order as merge()" do
h = { 1 => 2, 3 => 4, 5 => 6, "x" => nil, nil => 5, [] => [] }
merge_bang_pairs = []
merge_pairs = []
h.merge(h) { |*arg| merge_pairs << arg }
h.send(@method, h) { |*arg| merge_bang_pairs << arg }
merge_bang_pairs.should == merge_pairs
end
it "raises a FrozenError on a frozen instance that is modified" do
-> do
HashSpecs.frozen_hash.send(@method, 1 => 2)
end.should raise_error(FrozenError)
end
it "checks frozen status before coercing an object with #to_hash" do
obj = mock("to_hash frozen")
# This is necessary because mock cleanup code cannot run on the frozen
# object.
def obj.to_hash() raise Exception, "should not receive #to_hash" end
obj.freeze
-> { HashSpecs.frozen_hash.send(@method, obj) }.should raise_error(FrozenError)
end
# see redmine #1571
it "raises a FrozenError on a frozen instance that would not be modified" do
-> do
HashSpecs.frozen_hash.send(@method, HashSpecs.empty_frozen_hash)
end.should raise_error(FrozenError)
end
it "does not raise an exception if changing the value of an existing key during iteration" do
hash = {1 => 2, 3 => 4, 5 => 6}
hash2 = {1 => :foo, 3 => :bar}
hash.each { hash.send(@method, hash2) }
hash.should == {1 => :foo, 3 => :bar, 5 => 6}
end
it "accepts multiple hashes" do
result = { a: 1 }.send(@method, { b: 2 }, { c: 3 }, { d: 4 })
result.should == { a: 1, b: 2, c: 3, d: 4 }
end
it "accepts zero arguments" do
hash = { a: 1 }
hash.send(@method).should eql(hash)
end
end
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