perform some testing with <rules processing=...> and doc.rulesProcessingLast

Tests/designspaceLib/data/test.designspace

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='UTF-8'?>
-<designspace format="4.0">
+<designspace format="4.1">
   <axes>
     <axis tag="wght" name="weight" minimum="0" maximum="1000" default="0">
       <labelname xml:lang="en">Wéíght</labelname>
@@ -13,7 +13,7 @@
       <map input="1000" output="990"/>
     </axis>
   </axes>
-  <rules>
+  <rules processing="last">
     <rule name="named.rule.1">
       <conditionset>
         <condition name="axisName_a" minimum="0" maximum="1"/>

Tests/designspaceLib/designspace_test.py

@@ -49,6 +49,7 @@ def test_fill_document(tmpdir):
     instancePath1 = os.path.join(tmpdir, "instances", "instanceTest1.ufo")
     instancePath2 = os.path.join(tmpdir, "instances", "instanceTest2.ufo")
     doc = DesignSpaceDocument()
+    doc.rulesProcessingLast = True
 
     # write some axes
     a1 = AxisDescriptor()
@@ -698,6 +699,7 @@ def test_rulesDocument(tmpdir):
     testDocPath = os.path.join(tmpdir, "testRules.designspace")
     testDocPath2 = os.path.join(tmpdir, "testRules_roundtrip.designspace")
     doc = DesignSpaceDocument()
+    doc.rulesProcessingLast = True
     a1 = AxisDescriptor()
     a1.minimum = 0
     a1.maximum = 1000
@@ -741,6 +743,7 @@ def test_rulesDocument(tmpdir):
     _addUnwrappedCondition(testDocPath)
     doc2 = DesignSpaceDocument()
     doc2.read(testDocPath)
+    assert doc2.rulesProcessingLast
     assert len(doc2.axes) == 2
     assert len(doc2.rules) == 1
     assert len(doc2.rules[0].conditionSets) == 2