7 files changed, 92 insertions, 0 deletions
diff --git a/spec/ruby/library/set/shared/add.rb b/spec/ruby/library/set/shared/add.rb
new file mode 100644
index 0000000000..9e797f5df9
--- /dev/null
+++ b/spec/ruby/library/set/shared/add.rb
@@ -0,0 +1,14 @@
+describe :set_add, shared: true do
+  before :each do
+    @set = Set.new
+  end
+
+  it "adds the passed Object to self" do
+    @set.send(@method, "dog")
+    @set.should include("dog")
+  end
+
+  it "returns self" do
+    @set.send(@method, "dog").should equal(@set)
+  end
+end
diff --git a/spec/ruby/library/set/shared/collect.rb b/spec/ruby/library/set/shared/collect.rb
new file mode 100644
index 0000000000..bc58c231be
--- /dev/null
+++ b/spec/ruby/library/set/shared/collect.rb
@@ -0,0 +1,20 @@
+describe :set_collect_bang, shared: true do
+  before :each do
+    @set = Set[1, 2, 3, 4, 5]
+  end
+
+  it "yields each Object in self" do
+    res = []
+    @set.send(@method) { |x| res << x }
+    res.sort.should == [1, 2, 3, 4, 5].sort
+  end
+
+  it "returns self" do
+    @set.send(@method) { |x| x }.should equal(@set)
+  end
+
+  it "replaces self with the return values of the block" do
+    @set.send(@method) { |x| x * 2 }
+    @set.should == Set[2, 4, 6, 8, 10]
+  end
+end
diff --git a/spec/ruby/library/set/shared/difference.rb b/spec/ruby/library/set/shared/difference.rb
new file mode 100644
index 0000000000..9439715da7
--- /dev/null
+++ b/spec/ruby/library/set/shared/difference.rb
@@ -0,0 +1,15 @@
+describe :set_difference, shared: true do
+  before :each do
+    @set = Set[:a, :b, :c]
+  end
+
+  it "returns a new Set containting self's elements excluding the elements in the passed Enumerable" do
+    @set.send(@method, Set[:a, :b]).should == Set[:c]
+    @set.send(@method, [:b, :c]).should == Set[:a]
+  end
+
+  it "raises an ArgumentError when passed a non-Enumerable" do
+    lambda { @set.send(@method, 1) }.should raise_error(ArgumentError)
+    lambda { @set.send(@method, Object.new) }.should raise_error(ArgumentError)
+  end
+end
diff --git a/spec/ruby/library/set/shared/include.rb b/spec/ruby/library/set/shared/include.rb
new file mode 100644
index 0000000000..d41f8f4102
--- /dev/null
+++ b/spec/ruby/library/set/shared/include.rb
@@ -0,0 +1,7 @@
+describe :set_include, shared: true do
+  it "returns true when self contains the passed Object" do
+    set = Set[:a, :b, :c]
+    set.send(@method, :a).should be_true
+    set.send(@method, :e).should be_false
+  end
+end
diff --git a/spec/ruby/library/set/shared/intersection.rb b/spec/ruby/library/set/shared/intersection.rb
new file mode 100644
index 0000000000..ed0db7457d
--- /dev/null
+++ b/spec/ruby/library/set/shared/intersection.rb
@@ -0,0 +1,15 @@
+describe :set_intersection, shared: true do
+  before :each do
+    @set = Set[:a, :b, :c]
+  end
+
+  it "returns a new Set containing only elements shared by self and the passed Enumerable" do
+    @set.send(@method, Set[:b, :c, :d, :e]).should == Set[:b, :c]
+    @set.send(@method, [:b, :c, :d]).should == Set[:b, :c]
+  end
+
+  it "raises an ArgumentError when passed a non-Enumerable" do
+    lambda { @set.send(@method, 1) }.should raise_error(ArgumentError)
+    lambda { @set.send(@method, Object.new) }.should raise_error(ArgumentError)
+  end
+end
diff --git a/spec/ruby/library/set/shared/length.rb b/spec/ruby/library/set/shared/length.rb
new file mode 100644
index 0000000000..a8fcee9f39
--- /dev/null
+++ b/spec/ruby/library/set/shared/length.rb
@@ -0,0 +1,6 @@
+describe :set_length, shared: true do
+  it "returns the number of elements in the set" do
+    set = Set[:a, :b, :c]
+    set.send(@method).should == 3
+  end
+end
diff --git a/spec/ruby/library/set/shared/union.rb b/spec/ruby/library/set/shared/union.rb
new file mode 100644
index 0000000000..81920f5687
--- /dev/null
+++ b/spec/ruby/library/set/shared/union.rb
@@ -0,0 +1,15 @@
+describe :set_union, shared: true do
+  before :each do
+    @set = Set[:a, :b, :c]
+  end
+
+  it "returns a new Set containing all elements of self and the passed Enumerable" do
+    @set.send(@method, Set[:b, :d, :e]).should == Set[:a, :b, :c, :d, :e]
+    @set.send(@method, [:b, :e]).should == Set[:a, :b, :c, :e]
+  end
+
+  it "raises an ArgumentError when passed a non-Enumerable" do
+    lambda { @set.send(@method, 1) }.should raise_error(ArgumentError)
+    lambda { @set.send(@method, Object.new) }.should raise_error(ArgumentError)
+  end
+end