You can now add feed relationships in a Brick model from IFC elements

src/blenderbim/test/bim/feature/brick.feature

@@ -74,3 +74,25 @@ Scenario: Add brick - with a brick IFC library
     And I set "scene.BIMBrickProperties.namespace" to "http://example.org/digitaltwin#"
     When I press "bim.add_brick"
     Then nothing happens
+
+Scenario: Add brick feed
+    Given an empty IFC project
+    And I press "bim.load_brick_project(filepath='{cwd}/test/files/spaces.ttl')"
+    And I press "bim.convert_brick_project"
+    And I set "scene.BIMBrickProperties.namespace" to "http://example.org/digitaltwin#"
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcUnitaryEquipment"
+    And I set "scene.BIMRootProperties.ifc_predefined_type" to "AIRHANDLER"
+    And I press "bim.assign_class"
+    And I press "bim.add_brick"
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcAirTerminalBox"
+    And I set "scene.BIMRootProperties.ifc_predefined_type" to "VARIABLEFLOWPRESSUREDEPENDANT"
+    And I press "bim.assign_class"
+    And I press "bim.add_brick"
+    And the object "IfcUnitaryEquipment/Cube" is selected
+    And additionally the object "IfcAirTerminalBox/Cube" is selected
+    When I press "bim.add_brick_feed"
+    Then nothing happens

src/blenderbim/test/core/test_brick.py

@@ -126,3 +126,13 @@ class TestAddBrick:
         brick.add_brick("product", "namespace", "brick_class").should_be_called().will_return("brick_uri")
         brick.run_assign_brick_reference(obj="obj", library="library", brick_uri="brick_uri").should_be_called()
         subject.add_brick(ifc, brick, obj="obj", namespace="namespace", brick_class="brick_class", library="library")
+
+
+class TestAddBrickFeed:
+    def test_run(self, ifc, brick):
+        ifc.get_entity("source").should_be_called().will_return("source_element")
+        ifc.get_entity("destination").should_be_called().will_return("destination_element")
+        brick.get_brick("source_element").should_be_called().will_return("source_brick")
+        brick.get_brick("destination_element").should_be_called().will_return("destination_brick")
+        brick.add_feed("source_brick", "destination_brick").should_be_called()
+        subject.add_brick_feed(ifc, brick, source="source", destination="destination")

src/blenderbim/test/tool/test_brick.py

@@ -121,6 +121,21 @@ class TestAddBrickifcReference(NewFile):
         )
 
 
+class TestAddFeed(NewFile):
+    def test_run(self):
+        BrickStore.graph = brickschema.Graph()
+        subject.add_feed("http://example.org/digitaltwin#source", "http://example.org/digitaltwin#destination")
+        assert list(
+            BrickStore.graph.triples(
+                (
+                    URIRef("http://example.org/digitaltwin#source"),
+                    URIRef("https://brickschema.org/schema/Brick#feeds"),
+                    URIRef("http://example.org/digitaltwin#destination"),
+                )
+            )
+        )
+
+
 class TestClearBrickBrowser(NewFile):
     def test_run(self):
         bpy.context.scene.BIMBrickProperties.bricks.add()
@@ -141,11 +156,34 @@ class TestClearProject(NewFile):
 
 class TestExportBrickAttributes(NewFile):
     def test_run(self):
-        assert subject.export_brick_attributes("http://example.org/digitaltwin#floor") == {"Identification": "http://example.org/digitaltwin#floor", "Name": "floor"}
+        assert subject.export_brick_attributes("http://example.org/digitaltwin#floor") == {
+            "Identification": "http://example.org/digitaltwin#floor",
+            "Name": "floor",
+        }
 
     def test_run_ifc2x3(self):
         tool.Ifc.set(ifcopenshell.file(schema="IFC2X3"))
-        assert subject.export_brick_attributes("http://example.org/digitaltwin#floor") == {"ItemReference": "http://example.org/digitaltwin#floor", "Name": "floor"}
+        assert subject.export_brick_attributes("http://example.org/digitaltwin#floor") == {
+            "ItemReference": "http://example.org/digitaltwin#floor",
+            "Name": "floor",
+        }
+
+
+class TestGetBrick(NewFile):
+    def test_run(self):
+        ifc = ifcopenshell.file()
+        element = ifc.createIfcChiller()
+        library = ifc.createIfcLibraryReference(Identification="http://example.org/digitaltwin#globalid")
+        ifc.createIfcRelAssociatesLibrary(RelatedObjects=[element], RelatingLibrary=library)
+        assert subject.get_brick(element) == "http://example.org/digitaltwin#globalid"
+
+    def test_run_ifc2x3(self):
+        ifc = ifcopenshell.file(schema="IFC2X3")
+        tool.Ifc.set(ifc)
+        element = ifc.createIfcEnergyConversionDevice()
+        library = ifc.createIfcLibraryReference(ItemReference="http://example.org/digitaltwin#globalid")
+        ifc.createIfcRelAssociatesLibrary(RelatedObjects=[element], RelatingLibrary=library)
+        assert subject.get_brick(element) == "http://example.org/digitaltwin#globalid"
 
 
 class TestGetBrickPath(NewFile):
@@ -180,7 +218,9 @@ class TestGetLibraryBrickReference(NewFile):
     def test_run(self):
         ifc = ifcopenshell.file()
         library = ifc.createIfcLibraryInformation()
-        reference = ifc.createIfcLibraryReference(Identification="http://example.org/digitaltwin#floor", ReferencedLibrary=library)
+        reference = ifc.createIfcLibraryReference(
+            Identification="http://example.org/digitaltwin#floor", ReferencedLibrary=library
+        )
         assert subject.get_library_brick_reference(library, "http://example.org/digitaltwin#floor") == reference
 
     def test_run_ifc2x3(self):