diff options
Diffstat (limited to 'spec/rubyspec/core/hash/shift_spec.rb')
| -rw-r--r-- | spec/rubyspec/core/hash/shift_spec.rb | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/spec/rubyspec/core/hash/shift_spec.rb b/spec/rubyspec/core/hash/shift_spec.rb deleted file mode 100644 index 3991da9656..0000000000 --- a/spec/rubyspec/core/hash/shift_spec.rb +++ /dev/null @@ -1,64 +0,0 @@ -require File.expand_path('../../../spec_helper', __FILE__) -require File.expand_path('../fixtures/classes', __FILE__) - -describe "Hash#shift" do - it "removes a pair from hash and return it" do - h = { a: 1, b: 2, "c" => 3, nil => 4, [] => 5 } - h2 = h.dup - - h.size.times do |i| - r = h.shift - r.should be_kind_of(Array) - h2[r.first].should == r.last - h.size.should == h2.size - i - 1 - end - - h.should == {} - end - - # MRI explicitly implements this behavior - it "allows shifting entries while iterating" do - h = { a: 1, b: 2, c: 3 } - visited = [] - shifted = [] - h.each_pair { |k,v| - visited << k - shifted << h.shift - } - visited.should == [:a, :b, :c] - shifted.should == [[:a, 1], [:b, 2], [:c, 3]] - h.should == {} - end - - it "calls #default with nil if the Hash is empty" do - h = {} - def h.default(key) - key.should == nil - :foo - end - h.shift.should == :foo - end - - it "returns nil from an empty hash" do - {}.shift.should == nil - end - - it "returns (computed) default for empty hashes" do - Hash.new(5).shift.should == 5 - h = Hash.new { |*args| args } - h.shift.should == [h, nil] - end - - it "preserves Hash invariants when removing the last item" do - h = { :a => 1, :b => 2 } - h.shift.should == [:a, 1] - h.shift.should == [:b, 2] - h[:c] = 3 - h.should == {:c => 3} - end - - it "raises a RuntimeError if called on a frozen instance" do - lambda { HashSpecs.frozen_hash.shift }.should raise_error(RuntimeError) - lambda { HashSpecs.empty_frozen_hash.shift }.should raise_error(RuntimeError) - end -end |
