1 files changed, 24 insertions, 1 deletions
diff --git a/spec/ruby/core/array/drop_spec.rb b/spec/ruby/core/array/drop_spec.rb
index 1bd2e6cc25..5926c291b8 100644
--- a/spec/ruby/core/array/drop_spec.rb
+++ b/spec/ruby/core/array/drop_spec.rb
@@ -1,4 +1,5 @@
 require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
 
 describe "Array#drop" do
   it "removes the specified number of elements from the start of the array" do
@@ -6,7 +7,7 @@ describe "Array#drop" do
   end
 
   it "raises an ArgumentError if the number of elements specified is negative" do
-   lambda { [1, 2].drop(-3) }.should raise_error(ArgumentError)
+    -> { [1, 2].drop(-3) }.should raise_error(ArgumentError)
   end
 
   it "returns an empty Array if all elements are dropped" do
@@ -30,4 +31,26 @@ describe "Array#drop" do
     ary.shift
     ary.drop(1).should == [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(2)
+
+    [1, 2, 3].drop(obj).should == [3]
+  end
+
+  it "raises a TypeError when the passed argument can't be coerced to Integer" do
+    -> { [1, 2].drop("cat") }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError when the passed argument isn't an integer and #to_int returns non-Integer" do
+    obj = mock("to_int")
+    obj.should_receive(:to_int).and_return("cat")
+
+    -> { [1, 2].drop(obj) }.should raise_error(TypeError)
+  end
+
+  it 'returns a Array instance for Array subclasses' do
+    ArraySpecs::MyArray[1, 2, 3, 4, 5].drop(1).should be_an_instance_of(Array)
+  end
 end