1 files changed, 40 insertions, 0 deletions
diff --git a/spec/ruby/core/array/append_spec.rb b/spec/ruby/core/array/append_spec.rb
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+++ b/spec/ruby/core/array/append_spec.rb
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+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+require_relative 'shared/push'
+
+describe "Array#<<" do
+  it "pushes the object onto the end of the array" do
+    ([ 1, 2 ] << "c" << "d" << [ 3, 4 ]).should == [1, 2, "c", "d", [3, 4]]
+  end
+
+  it "returns self to allow chaining" do
+    a = []
+    b = a
+    (a << 1).should equal(b)
+    (a << 2 << 3).should equal(b)
+  end
+
+  it "correctly resizes the Array" do
+    a = []
+    a.size.should == 0
+    a << :foo
+    a.size.should == 1
+    a << :bar << :baz
+    a.size.should == 3
+
+    a = [1, 2, 3]
+    a.shift
+    a.shift
+    a.shift
+    a << :foo
+    a.should == [:foo]
+  end
+
+  it "raises a FrozenError on a frozen array" do
+    -> { ArraySpecs.frozen_array << 5 }.should raise_error(FrozenError)
+  end
+end
+
+describe "Array#append" do
+  it_behaves_like :array_push, :append
+end