#2685 assoc material test cases

src/ifcopenshell-python/test/fixtures/rules/fail-assoc-material-IfcTask-IFC4.ifc

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+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition [CoordinationView]'),'2;1');
+FILE_NAME('','2023-01-13T11:08:39',(),(),'IfcOpenShell v0.7.0-8a108f37','IfcOpenShell v0.7.0-8a108f37','');
+FILE_SCHEMA(('IFC4'));
+ENDSEC;
+DATA;
+#1=IFCTASK('0J288bRSP71RkTGLX57Mso',$,'sleep',$,$,$,$,$,$,.T.,$,$,$);
+#2=IFCMATERIAL('brick',$,$);
+#3=IFCRELASSOCIATESMATERIAL('3CndjAA6v4f9K4OHeiDzQJ',$,$,$,(#1),#2);
+ENDSEC;
+END-ISO-10303-21;

src/ifcopenshell-python/test/fixtures/rules/generate_20.py

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+import ifcopenshell
+
+task = lambda f: f.createIfcTask(ifcopenshell.guid.new(),None,'sleep',IsMilestone=True)
+wall = lambda f: f.createIfcWall(ifcopenshell.guid.new())
+
+for i,fn in enumerate((task, wall)):
+    f = ifcopenshell.file(schema="IFC4")
+    elem = fn(f)
+    f.createIfcRelAssociatesMaterial(ifcopenshell.guid.new(), None, None, None, [elem], f.createIfcMaterial('brick'))
+    f.write(f"{'pass' if i else 'fail'}-assoc-material-{elem.is_a()}-{f.schema}.ifc")

src/ifcopenshell-python/test/fixtures/rules/pass-assoc-material-IfcWall-IFC4.ifc

@@ -0,0 +1,12 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition [CoordinationView]'),'2;1');
+FILE_NAME('','2023-01-13T11:08:39',(),(),'IfcOpenShell v0.7.0-8a108f37','IfcOpenShell v0.7.0-8a108f37','');
+FILE_SCHEMA(('IFC4'));
+ENDSEC;
+DATA;
+#1=IFCWALL('2AgqCFV5f2XhqZDQAUeko6',$,$,$,$,$,$,$,$);
+#2=IFCMATERIAL('brick',$,$);
+#3=IFCRELASSOCIATESMATERIAL('2dtKImsN59_hw0uWDJiJUA',$,$,$,(#1),#2);
+ENDSEC;
+END-ISO-10303-21;