1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/each_with_index_spec.rb b/spec/ruby/core/enumerator/each_with_index_spec.rb
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+++ b/spec/ruby/core/enumerator/each_with_index_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../../shared/enumerator/with_index', __FILE__)
+require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__)
+
+describe "Enumerator#each_with_index" do
+  it_behaves_like(:enum_with_index, :each_with_index)
+  it_behaves_like(:enumeratorized_with_origin_size, :each_with_index, [1,2,3].select)
+
+  it "returns a new Enumerator when no block is given" do
+    enum1 = [1,2,3].select
+    enum2 = enum1.each_with_index
+    enum2.should be_an_instance_of(Enumerator)
+    enum1.should_not === enum2
+  end
+
+  it "raises an ArgumentError if passed extra arguments" do
+    lambda do
+      [1].to_enum.each_with_index(:glark)
+    end.should raise_error(ArgumentError)
+  end
+
+  it "passes on the given block's return value" do
+    arr = [1,2,3]
+    arr.delete_if.with_index { |a,b| false }
+    arr.should == [1,2,3]
+  end
+
+  it "returns the iterator's return value" do
+    [1,2,3].select.with_index { |a,b| false }.should == []
+  end
+end
+
+describe "Enumerator#each_with_index" do
+  it "returns the correct value if chained with itself" do
+    [:a].each_with_index.each_with_index.to_a.should == [[[:a,0],0]]
+    [:a].each.with_index.with_index.to_a.should == [[[:a,0],0]]
+  end
+end