diff options
Diffstat (limited to 'spec/ruby/core/hash/default_spec.rb')
-rw-r--r-- | spec/ruby/core/hash/default_spec.rb | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/default_spec.rb b/spec/ruby/core/hash/default_spec.rb new file mode 100644 index 0000000000..6c1c7377b7 --- /dev/null +++ b/spec/ruby/core/hash/default_spec.rb @@ -0,0 +1,46 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Hash#default" do + it "returns the default value" do + h = Hash.new(5) + h.default.should == 5 + h.default(4).should == 5 + {}.default.should == nil + {}.default(4).should == nil + end + + it "uses the default proc to compute a default value, passing given key" do + h = Hash.new { |*args| args } + h.default(nil).should == [h, nil] + h.default(5).should == [h, 5] + end + + it "calls default proc with nil arg if passed a default proc but no arg" do + h = Hash.new { |*args| args } + h.default.should == nil + end +end + +describe "Hash#default=" do + it "sets the default value" do + h = {} + h.default = 99 + h.default.should == 99 + end + + it "unsets the default proc" do + [99, nil, lambda { 6 }].each do |default| + h = Hash.new { 5 } + h.default_proc.should_not == nil + h.default = default + h.default.should == default + h.default_proc.should == nil + end + end + + it "raises a RuntimeError if called on a frozen instance" do + lambda { HashSpecs.frozen_hash.default = nil }.should raise_error(RuntimeError) + lambda { HashSpecs.empty_frozen_hash.default = nil }.should raise_error(RuntimeError) + end +end |