1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/shared/enumerable/minmax.rb b/spec/ruby/shared/enumerable/minmax.rb
new file mode 100644
index 0000000000..8af2626d2a
--- /dev/null
+++ b/spec/ruby/shared/enumerable/minmax.rb
@@ -0,0 +1,24 @@
+describe :enumerable_minmax, shared: true do
+  it "min should return the minimum element" do
+    @enum.minmax.should == [4, 10]
+    @strs.minmax.should == ["1010", "60"]
+  end
+
+  it "returns the minimum when using a block rule" do
+    @enum.minmax {|a,b| b <=> a }.should == [10, 4]
+    @strs.minmax {|a,b| a.length <=> b.length }.should == ["2", "55555"]
+  end
+
+  it "returns [nil, nil] for an empty Enumerable" do
+    @empty_enum.minmax.should == [nil, nil]
+  end
+
+  it "raises a NoMethodError for elements without #<=>" do
+    -> { @incomparable_enum.minmax }.should raise_error(NoMethodError)
+  end
+
+  it "raises an ArgumentError when elements are incompatible" do
+    -> { @incompatible_enum.minmax }.should raise_error(ArgumentError)
+    -> { @enum.minmax{ |a, b| nil } }.should raise_error(ArgumentError)
+  end
+end