1 files changed, 50 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/drop_while_spec.rb b/spec/ruby/core/enumerable/drop_while_spec.rb
new file mode 100644
index 0000000000..731b9588e4
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+++ b/spec/ruby/core/enumerable/drop_while_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/enumerable_enumeratorized', __FILE__)
+
+describe "Enumerable#drop_while" do
+  before :each do
+    @enum = EnumerableSpecs::Numerous.new(3, 2, 1, :go)
+  end
+
+  it "returns an Enumerator if no block given" do
+    @enum.drop_while.should be_an_instance_of(Enumerator)
+  end
+
+  it "returns no/all elements for {true/false} block" do
+    @enum.drop_while{true}.should == []
+    @enum.drop_while{false}.should == @enum.to_a
+  end
+
+  it "accepts returns other than true/false" do
+    @enum.drop_while{1}.should == []
+    @enum.drop_while{nil}.should == @enum.to_a
+  end
+
+  it "passes elements to the block until the first false" do
+    a = []
+    @enum.drop_while{|obj| (a << obj).size < 3}.should == [1, :go]
+    a.should == [3, 2, 1]
+  end
+
+  it "will only go through what's needed" do
+    enum = EnumerableSpecs::EachCounter.new(1,2,3,4)
+    enum.drop_while { |x|
+      break 42 if x == 3
+      true
+    }.should == 42
+    enum.times_yielded.should == 3
+  end
+
+  it "doesn't return self when it could" do
+    a = [1,2,3]
+    a.drop_while{false}.should_not equal(a)
+  end
+
+  it "gathers whole arrays as elements when each yields multiple" do
+    multi = EnumerableSpecs::YieldsMulti.new
+    multi.drop_while {|e| e != [6, 7, 8, 9] }.should == [[6, 7, 8, 9]]
+  end
+
+  it_behaves_like :enumerable_enumeratorized_with_unknown_size, :drop_while
+end