*rename DefaultContent -> BuiltIn

1 files changed, 53 insertions, 0 deletions

diff --git a/Data/BuiltIn/Libraries/middleclass/spec/mixins_spec.lua b/Data/BuiltIn/Libraries/middleclass/spec/mixins_spec.lua
new file mode 100644
index 0000000..ef592a1
--- /dev/null
+++ b/Data/BuiltIn/Libraries/middleclass/spec/mixins_spec.lua
@@ -0,0 +1,53 @@
+local class = require 'middleclass'
+
+describe('A Mixin', function()
+
+  local Mixin1, Mixin2, Class1, Class2
+
+  before_each(function()
+    Mixin1, Mixin2 = {},{}
+
+    function Mixin1:included(theClass) theClass.includesMixin1 = true end
+    function Mixin1:foo() return 'foo' end
+    function Mixin1:bar() return 'bar' end
+    Mixin1.static = {}
+    Mixin1.static.bazzz = function() return 'bazzz' end
+
+
+    function Mixin2:baz() return 'baz' end
+
+    Class1 = class('Class1'):include(Mixin1, Mixin2)
+    function Class1:foo() return 'foo1' end
+
+    Class2 = class('Class2', Class1)
+    function Class2:bar2() return 'bar2' end
+  end)
+
+  it('invokes the "included" method when included', function()
+    assert.is_true(Class1.includesMixin1)
+  end)
+
+  it('has all its functions (except "included") copied to its target class', function()
+    assert.equal(Class1:bar(), 'bar')
+    assert.is_nil(Class1.included)
+  end)
+
+  it('makes its functions available to subclasses', function()
+    assert.equal(Class2:baz(), 'baz')
+  end)
+
+  it('allows overriding of methods in the same class', function()
+    assert.equal(Class2:foo(), 'foo1')
+  end)
+
+  it('allows overriding of methods on subclasses', function()
+    assert.equal(Class2:bar2(), 'bar2')
+  end)
+
+  it('makes new static methods available in classes', function()
+    assert.equal(Class1:bazzz(), 'bazzz')
+    assert.equal(Class2:bazzz(), 'bazzz')
+  end)
+
+end)
+