1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/core/array/include_spec.rb b/spec/ruby/core/array/include_spec.rb
new file mode 100644
index 0000000000..26d788afeb
--- /dev/null
+++ b/spec/ruby/core/array/include_spec.rb
@@ -0,0 +1,33 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array#include?" do
+  it "returns true if object is present, false otherwise" do
+    [1, 2, "a", "b"].include?("c").should == false
+    [1, 2, "a", "b"].include?("a").should == true
+  end
+
+  it "determines presence by using element == obj" do
+    o = mock('')
+
+    [1, 2, "a", "b"].include?(o).should == false
+
+    def o.==(other); other == 'a'; end
+
+    [1, 2, o, "b"].include?('a').should == true
+
+    [1, 2.0, 3].include?(2).should == true
+  end
+
+  it "calls == on elements from left to right until success" do
+    key = "x"
+    one = mock('one')
+    two = mock('two')
+    three = mock('three')
+    one.should_receive(:==).any_number_of_times.and_return(false)
+    two.should_receive(:==).any_number_of_times.and_return(true)
+    three.should_not_receive(:==)
+    ary = [one, two, three]
+    ary.include?(key).should == true
+  end
+end