diff --git a/platform/containment/test/CompositionPolicySpec.js b/platform/containment/test/CompositionPolicySpec.js
index d010b97cff..95ea6f238d 100644
--- a/platform/containment/test/CompositionPolicySpec.js
+++ b/platform/containment/test/CompositionPolicySpec.js
@@ -5,6 +5,59 @@ define(
     function (CompositionPolicy) {
         "use strict";
         describe("Composition policy", function () {
+            var mockInjector,
+                mockTypeService,
+                mockCapabilityService,
+                mockTypes,
+                policy;
+
+            beforeEach(function () {
+                mockInjector = jasmine.createSpyObj('$injector', ['get']);
+                mockTypeService = jasmine.createSpyObj(
+                    'typeService',
+                    [ 'listTypes' ]
+                );
+                mockCapabilityService = jasmine.createSpyObj(
+                    'capabilityService',
+                    [ 'getCapabilities' ]
+                );
+                // Both types can only contain b, let's say
+                mockTypes = ['a', 'b'].map(function (type) {
+                    var mockType = jasmine.createSpyObj(
+                        'type-' + type,
+                        ['getKey', 'getDefinition', 'getInitialModel']
+                    );
+                    mockType.getKey.andReturn(type);
+                    mockType.getDefinition.andReturn({
+                        contains: ['b']
+                    });
+                    mockType.getInitialModel.andReturn({});
+                    return mockType;
+                });
+
+                mockInjector.get.andCallFake(function (name) {
+                    return {
+                        typeService: mockTypeService,
+                        capabilityService: mockCapabilityService
+                    }[name];
+                });
+
+                mockTypeService.listTypes.andReturn(mockTypes);
+                mockCapabilityService.getCapabilities.andReturn({});
+
+                policy = new CompositionPolicy(mockInjector);
+            });
+
+            it("enforces containment rules defined by types", function () {
+                expect(policy.allow(mockTypes[0], mockTypes[1]))
+                    .toBeTruthy();
+                expect(policy.allow(mockTypes[1], mockTypes[1]))
+                    .toBeTruthy();
+                expect(policy.allow(mockTypes[1], mockTypes[0]))
+                    .toBeFalsy();
+                expect(policy.allow(mockTypes[0], mockTypes[0]))
+                    .toBeFalsy();
+            });
 
         });
     }