1 files changed, 61 insertions, 0 deletions
diff --git a/spec/ruby/core/array/delete_at_spec.rb b/spec/ruby/core/array/delete_at_spec.rb
new file mode 100644
index 0000000000..1d73ceb33a
--- /dev/null
+++ b/spec/ruby/core/array/delete_at_spec.rb
@@ -0,0 +1,61 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array#delete_at" do
+  it "removes the element at the specified index" do
+    a = [1, 2, 3, 4]
+    a.delete_at(2)
+    a.should == [1, 2, 4]
+    a.delete_at(-1)
+    a.should == [1, 2]
+  end
+
+  it "returns the removed element at the specified index" do
+    a = [1, 2, 3, 4]
+    a.delete_at(2).should == 3
+    a.delete_at(-1).should == 4
+  end
+
+  it "returns nil and makes no modification if the index is out of range" do
+    a = [1, 2]
+    a.delete_at(3).should == nil
+    a.should == [1, 2]
+    a.delete_at(-3).should == nil
+    a.should == [1, 2]
+  end
+
+  it "tries to convert the passed argument to an Integer using #to_int" do
+    obj = mock('to_int')
+    obj.should_receive(:to_int).and_return(-1)
+    [1, 2].delete_at(obj).should == 2
+  end
+
+  it "accepts negative indices" do
+    a = [1, 2]
+    a.delete_at(-2).should == 1
+  end
+
+  it "raises a RuntimeError on a frozen array" do
+    lambda { [1,2,3].freeze.delete_at(0) }.should raise_error(RuntimeError)
+  end
+
+  it "keeps tainted status" do
+    ary = [1, 2]
+    ary.taint
+    ary.tainted?.should be_true
+    ary.delete_at(0)
+    ary.tainted?.should be_true
+    ary.delete_at(0) # now empty
+    ary.tainted?.should be_true
+  end
+
+  it "keeps untrusted status" do
+    ary = [1, 2]
+    ary.untrust
+    ary.untrusted?.should be_true
+    ary.delete_at(0)
+    ary.untrusted?.should be_true
+    ary.delete_at(0) # now empty
+    ary.untrusted?.should be_true
+  end
+end