1 files changed, 57 insertions, 0 deletions
diff --git a/spec/rubyspec/core/array/plus_spec.rb b/spec/rubyspec/core/array/plus_spec.rb
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+++ b/spec/rubyspec/core/array/plus_spec.rb
@@ -0,0 +1,57 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array#+" do
+  it "concatenates two arrays" do
+    ([ 1, 2, 3 ] + [ 3, 4, 5 ]).should == [1, 2, 3, 3, 4, 5]
+    ([ 1, 2, 3 ] + []).should == [1, 2, 3]
+    ([] + [ 1, 2, 3 ]).should == [1, 2, 3]
+    ([] + []).should == []
+  end
+
+  it "can concatenate an array with itself" do
+    ary = [1, 2, 3]
+    (ary + ary).should == [1, 2, 3, 1, 2, 3]
+  end
+
+  it "tries to convert the passed argument to an Array using #to_ary" do
+    obj = mock('["x", "y"]')
+    obj.should_receive(:to_ary).and_return(["x", "y"])
+    ([1, 2, 3] + obj).should == [1, 2, 3, "x", "y"]
+  end
+
+  it "properly handles recursive arrays" do
+    empty = ArraySpecs.empty_recursive_array
+    (empty + empty).should == [empty, empty]
+
+    array = ArraySpecs.recursive_array
+    (empty + array).should == [empty, 1, 'two', 3.0, array, array, array, array, array]
+    (array + array).should == [
+      1, 'two', 3.0, array, array, array, array, array,
+      1, 'two', 3.0, array, array, array, array, array]
+  end
+
+  it "does return subclass instances with Array subclasses" do
+    (ArraySpecs::MyArray[1, 2, 3] + []).should be_an_instance_of(Array)
+    (ArraySpecs::MyArray[1, 2, 3] + ArraySpecs::MyArray[]).should be_an_instance_of(Array)
+    ([1, 2, 3] + ArraySpecs::MyArray[]).should be_an_instance_of(Array)
+  end
+
+  it "does not call to_ary on array subclasses" do
+    ([5, 6] + ArraySpecs::ToAryArray[1, 2]).should == [5, 6, 1, 2]
+  end
+
+  it "does not get infected even if an original array is tainted" do
+    ([1, 2] + [3, 4]).tainted?.should be_false
+    ([1, 2].taint + [3, 4]).tainted?.should be_false
+    ([1, 2] + [3, 4].taint).tainted?.should be_false
+    ([1, 2].taint + [3, 4].taint).tainted?.should be_false
+  end
+
+  it "does not infected even if an original array is untrusted" do
+    ([1, 2] + [3, 4]).untrusted?.should be_false
+    ([1, 2].untrust + [3, 4]).untrusted?.should be_false
+    ([1, 2] + [3, 4].untrust).untrusted?.should be_false
+    ([1, 2].untrust + [3, 4].untrust).untrusted?.should be_false
+  end
+end