1 files changed, 80 insertions, 0 deletions
diff --git a/spec/rubyspec/core/hash/default_proc_spec.rb b/spec/rubyspec/core/hash/default_proc_spec.rb
new file mode 100644
index 0000000000..0bd20d43af
--- /dev/null
+++ b/spec/rubyspec/core/hash/default_proc_spec.rb
@@ -0,0 +1,80 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Hash#default_proc" do
+  it "returns the block passed to Hash.new" do
+    h = Hash.new { 'Paris' }
+    p = h.default_proc
+    p.call(1).should == 'Paris'
+  end
+
+  it "returns nil if no block was passed to proc" do
+    {}.default_proc.should == nil
+  end
+end
+
+describe "Hash#default_proc=" do
+  it "replaces the block passed to Hash.new" do
+    h = Hash.new { 'Paris' }
+    h.default_proc = Proc.new { 'Montreal' }
+    p = h.default_proc
+    p.call(1).should == 'Montreal'
+  end
+
+  it "uses :to_proc on its argument" do
+    h = Hash.new { 'Paris' }
+    obj = mock('to_proc')
+    obj.should_receive(:to_proc).and_return(Proc.new { 'Montreal' })
+    (h.default_proc = obj).should equal(obj)
+    h[:cool_city].should == 'Montreal'
+  end
+
+  it "overrides the static default" do
+    h = Hash.new(42)
+    h.default_proc = Proc.new { 6 }
+    h.default.should be_nil
+    h.default_proc.call.should == 6
+  end
+
+  it "raises an error if passed stuff not convertible to procs" do
+    lambda{{}.default_proc = 42}.should raise_error(TypeError)
+  end
+
+  it "returns the passed Proc" do
+    new_proc = Proc.new {}
+    ({}.default_proc = new_proc).should equal(new_proc)
+  end
+
+  it "clears the default proc if passed nil" do
+    h = Hash.new { 'Paris' }
+    h.default_proc = nil
+    h.default_proc.should == nil
+    h[:city].should == nil
+  end
+
+  it "returns nil if passed nil" do
+    ({}.default_proc = nil).should be_nil
+  end
+
+  it "accepts a lambda with an arity of 2" do
+    h = {}
+    lambda do
+      h.default_proc = lambda {|a,b| }
+    end.should_not raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed a lambda with an arity other than 2" do
+    h = {}
+    lambda do
+      h.default_proc = lambda {|a| }
+    end.should raise_error(TypeError)
+    lambda do
+      h.default_proc = lambda {|a,b,c| }
+    end.should raise_error(TypeError)
+  end
+
+  it "raises a RuntimeError if self is frozen" do
+    lambda { {}.freeze.default_proc = Proc.new {} }.should raise_error(RuntimeError)
+    lambda { {}.freeze.default_proc = nil }.should raise_error(RuntimeError)
+  end
+end