1 files changed, 41 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..80ec643702
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+++ b/spec/ruby/core/array/delete_at_spec.rb
@@ -0,0 +1,41 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+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 FrozenError on a frozen array" do
+    -> { [1,2,3].freeze.delete_at(0) }.should raise_error(FrozenError)
+  end
+end