1 files changed, 156 insertions, 0 deletions
diff --git a/spec/ruby/core/array/initialize_spec.rb b/spec/ruby/core/array/initialize_spec.rb
new file mode 100644
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+++ b/spec/ruby/core/array/initialize_spec.rb
@@ -0,0 +1,156 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array#initialize" do
+  before :each do
+    ScratchPad.clear
+  end
+
+  it "is private" do
+    Array.should have_private_instance_method("initialize")
+  end
+
+  it "is called on subclasses" do
+    b = ArraySpecs::SubArray.new :size_or_array, :obj
+
+    b.should == []
+    ScratchPad.recorded.should == [:size_or_array, :obj]
+  end
+
+  it "preserves the object's identity even when changing its value" do
+    a = [1, 2, 3]
+    a.send(:initialize).should equal(a)
+    a.should_not == [1, 2, 3]
+  end
+
+  it "raises an ArgumentError if passed 3 or more arguments" do
+    lambda do
+      [1, 2].send :initialize, 1, 'x', true
+    end.should raise_error(ArgumentError)
+    lambda do
+      [1, 2].send(:initialize, 1, 'x', true) {}
+    end.should raise_error(ArgumentError)
+  end
+
+  it "raises a RuntimeError on frozen arrays" do
+    lambda do
+      ArraySpecs.frozen_array.send :initialize
+    end.should raise_error(RuntimeError)
+    lambda do
+      ArraySpecs.frozen_array.send :initialize, ArraySpecs.frozen_array
+    end.should raise_error(RuntimeError)
+  end
+
+  it "calls #to_ary to convert the value to an array, even if it's private" do
+    a = ArraySpecs::PrivateToAry.new
+    [].send(:initialize, a).should == [1, 2, 3]
+  end
+end
+
+describe "Array#initialize with no arguments" do
+  it "makes the array empty" do
+    [1, 2, 3].send(:initialize).should be_empty
+  end
+
+  it "does not use the given block" do
+    lambda{ [1, 2, 3].send(:initialize) { raise } }.should_not raise_error
+  end
+end
+
+describe "Array#initialize with (array)" do
+  it "replaces self with the other array" do
+    b = [4, 5, 6]
+    [1, 2, 3].send(:initialize, b).should == b
+  end
+
+  it "does not use the given block" do
+    lambda{ [1, 2, 3].send(:initialize) { raise } }.should_not raise_error
+  end
+
+  it "calls #to_ary to convert the value to an array" do
+    a = mock("array")
+    a.should_receive(:to_ary).and_return([1, 2])
+    a.should_not_receive(:to_int)
+    [].send(:initialize, a).should == [1, 2]
+  end
+
+  it "does not call #to_ary on instances of Array or subclasses of Array" do
+    a = [1, 2]
+    a.should_not_receive(:to_ary)
+    [].send(:initialize, a).should == a
+  end
+
+  it "raises a TypeError if an Array type argument and a default object" do
+    lambda { [].send(:initialize, [1, 2], 1) }.should raise_error(TypeError)
+  end
+end
+
+describe "Array#initialize with (size, object=nil)" do
+  it "sets the array to size and fills with the object" do
+    a = []
+    obj = [3]
+    a.send(:initialize, 2, obj).should == [obj, obj]
+    a[0].should equal(obj)
+    a[1].should equal(obj)
+
+    b = []
+    b.send(:initialize, 3, 14).should == [14, 14, 14]
+    b.should == [14, 14, 14]
+  end
+
+  it "sets the array to size and fills with nil when object is omitted" do
+    [].send(:initialize, 3).should == [nil, nil, nil]
+  end
+
+  it "raises an ArgumentError if size is negative" do
+    lambda { [].send(:initialize, -1, :a) }.should raise_error(ArgumentError)
+    lambda { [].send(:initialize, -1) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an ArgumentError if size is too large" do
+    lambda { [].send(:initialize, fixnum_max+1) }.should raise_error(ArgumentError)
+  end
+
+  it "calls #to_int to convert the size argument to an Integer when object is given" do
+    obj = mock('1')
+    obj.should_receive(:to_int).and_return(1)
+    [].send(:initialize, obj, :a).should == [:a]
+  end
+
+  it "calls #to_int to convert the size argument to an Integer when object is not given" do
+    obj = mock('1')
+    obj.should_receive(:to_int).and_return(1)
+    [].send(:initialize, obj).should == [nil]
+  end
+
+  it "raises a TypeError if the size argument is not an Integer type" do
+    obj = mock('nonnumeric')
+    obj.stub!(:to_ary).and_return([1, 2])
+    lambda{ [].send(:initialize, obj, :a) }.should raise_error(TypeError)
+  end
+
+  it "yields the index of the element and sets the element to the value of the block" do
+    [].send(:initialize, 3) { |i| i.to_s }.should == ['0', '1', '2']
+  end
+
+  it "uses the block value instead of using the default value" do
+    lambda {
+      @result = [].send(:initialize, 3, :obj) { |i| i.to_s }
+    }.should complain(/block supersedes default value argument/)
+    @result.should == ['0', '1', '2']
+  end
+
+  it "returns the value passed to break" do
+    [].send(:initialize, 3) { break :a }.should == :a
+  end
+
+  it "sets the array to the values returned by the block before break is executed" do
+    a = [1, 2, 3]
+    a.send(:initialize, 3) do |i|
+      break if i == 2
+      i.to_s
+    end
+
+    a.should == ['0', '1']
+  end
+end