summaryrefslogtreecommitdiff
path: root/spec/ruby/core/array/element_reference_spec.rb
diff options
context:
space:
mode:
Diffstat (limited to 'spec/ruby/core/array/element_reference_spec.rb')
-rw-r--r--spec/ruby/core/array/element_reference_spec.rb50
1 files changed, 50 insertions, 0 deletions
diff --git a/spec/ruby/core/array/element_reference_spec.rb b/spec/ruby/core/array/element_reference_spec.rb
new file mode 100644
index 0000000000..55b6b73d1e
--- /dev/null
+++ b/spec/ruby/core/array/element_reference_spec.rb
@@ -0,0 +1,50 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/slice', __FILE__)
+
+describe "Array#[]" do
+ it_behaves_like(:array_slice, :[])
+end
+
+describe "Array.[]" do
+ it "[] should return a new array populated with the given elements" do
+ array = Array[1, 'a', nil]
+ array[0].should == 1
+ array[1].should == 'a'
+ array[2].should == nil
+ end
+
+ it "when applied to a literal nested array, unpacks its elements into the containing array" do
+ Array[1, 2, *[3, 4, 5]].should == [1, 2, 3, 4, 5]
+ end
+
+ it "when applied to a nested referenced array, unpacks its elements into the containing array" do
+ splatted_array = Array[3, 4, 5]
+ Array[1, 2, *splatted_array].should == [1, 2, 3, 4, 5]
+ end
+
+ it "can unpack 2 or more nested referenced array" do
+ splatted_array = Array[3, 4, 5]
+ splatted_array2 = Array[6, 7, 8]
+ Array[1, 2, *splatted_array, *splatted_array2].should == [1, 2, 3, 4, 5, 6, 7, 8]
+ end
+
+ it "constructs a nested Hash for tailing key-value pairs" do
+ Array[1, 2, 3 => 4, 5 => 6].should == [1, 2, { 3 => 4, 5 => 6 }]
+ end
+
+ describe "with a subclass of Array" do
+ before :each do
+ ScratchPad.clear
+ end
+
+ it "returns an instance of the subclass" do
+ ArraySpecs::MyArray[1, 2, 3].should be_an_instance_of(ArraySpecs::MyArray)
+ end
+
+ it "does not call #initialize on the subclass instance" do
+ ArraySpecs::MyArray[1, 2, 3].should == [1, 2, 3]
+ ScratchPad.recorded.should be_nil
+ end
+ end
+end