1 files changed, 43 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/drop_spec.rb b/spec/ruby/core/enumerable/drop_spec.rb
new file mode 100644
index 0000000000..1bcdc0ee9a
--- /dev/null
+++ b/spec/ruby/core/enumerable/drop_spec.rb
@@ -0,0 +1,43 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Enumerable#drop" do
+  before :each do
+    @enum = EnumerableSpecs::Numerous.new(3, 2, 1, :go)
+  end
+
+  it "requires exactly one argument" do
+    lambda{ @enum.drop{} }.should raise_error(ArgumentError)
+    lambda{ @enum.drop(1, 2){} }.should raise_error(ArgumentError)
+  end
+
+  describe "passed a number n as an argument" do
+    it "raises ArgumentError if n < 0" do
+      lambda{ @enum.drop(-1) }.should raise_error(ArgumentError)
+    end
+
+    it "tries to convert n to an Integer using #to_int" do
+      @enum.drop(2.3).should == [1, :go]
+
+      obj = mock('to_int')
+      obj.should_receive(:to_int).and_return(2)
+      @enum.drop(obj).should == [1, :go]
+    end
+
+    it "returns [] for empty enumerables" do
+      EnumerableSpecs::Empty.new.drop(0).should == []
+      EnumerableSpecs::Empty.new.drop(2).should == []
+    end
+
+    it "returns [] if dropping all" do
+      @enum.drop(5).should == []
+      EnumerableSpecs::Numerous.new(3, 2, 1, :go).drop(4).should == []
+    end
+
+    it "raises a TypeError when the passed n can be coerced to Integer" do
+      lambda{ @enum.drop("hat") }.should raise_error(TypeError)
+      lambda{ @enum.drop(nil) }.should raise_error(TypeError)
+    end
+
+  end
+end