[processing] Try to resurrect grass tests

.ci/travis/linux/blacklist.txt

@@ -4,14 +4,8 @@ PyQgsLocalServer
 PyQgsPalLabelingServer
 qgis_composermapgridtest
 qgis_composerutils
-ProcessingGrass7AlgorithmsImageryTest
-ProcessingGrass7AlgorithmsRasterTest
-ProcessingGrass7AlgorithmsVectorTest
 PyQgsAppStartup
 
-# temporary during processing refactoring
-ProcessingParametersTest
-
 # code layout tests are run on separate build
 qgis_spelling
 qgis_sipify

python/plugins/processing/tests/Grass7AlgorithmsImageryTest.py

@@ -34,6 +34,7 @@ from qgis.testing import (
     start_app,
     unittest
 )
+from processing.algs.grass7.Grass7Utils import Grass7Utils
 
 
 class TestGrass7AlgorithmsImageryTest(unittest.TestCase, AlgorithmsTestBase.AlgorithmsTest):
@@ -45,6 +46,8 @@ class TestGrass7AlgorithmsImageryTest(unittest.TestCase, AlgorithmsTestBase.Algo
         Processing.initialize()
         cls.cleanup_paths = []
 
+        assert Grass7Utils.installedVersion()
+
     @classmethod
     def tearDownClass(cls):
         from processing.core.Processing import Processing

python/plugins/processing/tests/Grass7AlgorithmsRasterTest.py

@@ -34,6 +34,7 @@ from qgis.testing import (
     start_app,
     unittest
 )
+from processing.algs.grass7.Grass7Utils import Grass7Utils
 
 
 class TestGrass7AlgorithmsRasterTest(unittest.TestCase, AlgorithmsTestBase.AlgorithmsTest):
@@ -45,6 +46,8 @@ class TestGrass7AlgorithmsRasterTest(unittest.TestCase, AlgorithmsTestBase.Algor
         Processing.initialize()
         cls.cleanup_paths = []
 
+        assert Grass7Utils.installedVersion()
+
     @classmethod
     def tearDownClass(cls):
         from processing.core.Processing import Processing