fix issues with some malfunctioning docker commands (#2309)

ganga/GangaCore/Lib/Virtualization/Docker.py

@@ -36,7 +36,7 @@ class Docker(IVirtualization):
     _schema = IVirtualization._schema.inherit_copy()
     _schema.datadict['mode'] = SimpleItem(defvalue="P1", doc='Mode of container execution')
 
-    def __init__(self, image, mode):
+    def __init__(self, image='', mode='P1'):
         super().__init__(image)
         self.mode = mode
 

ganga/GangaCore/test/Unit/Virtualization/TestVirtualizationDocker.py

@@ -0,0 +1,85 @@
+from GangaCore.testlib.GangaUnitTest import GangaUnitTest
+from GangaCore.Lib.Virtualization import Docker
+from GangaTest.Framework.utils import sleep_until_completed
+
+
+class TestDocker(GangaUnitTest):
+    def test_DockerNoImageArg(self):
+        """
+        The test_DockerNoImageArg function tests that Ganga can
+        submit a virtualization job using the default Docker image.
+
+        This test will fail if Ganga cannot find the job in the registry or
+        it cannot intialize the container with the default Docker image.
+        """
+        from GangaCore.GPI import Job
+        j = Job(name="dockertest")
+        self.assertEqual(j.name, 'dockertest', "Something wrong with how\
+Job was imported or initialized.")
+        j.virtualization = Docker()
+        self.assertEqual(j.virtualization.image, '', "Docker image was not\
+passed correctly as an argument.")
+        j.submit()
+        sleep_until_completed(j)
+        j.remove()
+
+    def test_DockerBareImageArg(self):
+        """
+        The test_DockerBareImageArg function tests that the Docker image
+        is passed correctly as an argument without the 'image=' prefix.
+
+        This test will fail if Ganga cannot find the job in the registry or
+        it cannot intialize the container with the desired Docker image.
+        """
+        from GangaCore.GPI import Job
+        j = Job(name="dockertest")
+        self.assertEqual(j.name, 'dockertest', "Something wrong with how\
+Job was imported or initialized.")
+        j.virtualization = Docker('fedora:latest')
+        self.assertEqual(j.virtualization.image, 'fedora:latest', "Docker\
+image was not passed correctly as an argument.")
+        j.submit()
+        sleep_until_completed(j)
+        j.remove()
+
+    def test_DockerImageArg(self):
+        """
+        The DockerImageArg function tests that the Docker image
+        is passed correctly as an argument with the 'image=' prefix.
+
+        This test will fail if Ganga cannot find the job in the registry or
+        it cannot intialize the container with the desired Docker image.
+        """
+        from GangaCore.GPI import Job
+        j = Job(name="dockertest")
+        self.assertEqual(j.name, 'dockertest', "Something wrong with how\
+Job was imported or initialized.")
+        j.virtualization = Docker(image='fedora:latest')
+        self.assertEqual(j.virtualization.image, 'fedora:latest', "Docker\
+image was not passed correctly as an argument.")
+        j.submit()
+        sleep_until_completed(j)
+        j.remove()
+
+    def test_DockerImageArgWithMode(self):
+        """
+        The DockerImageArgWithMode function tests that the Docker image
+        is passed correctly as an argument with the 'image=' prefix. It
+        also test if mode is explicitly set to 'P1'.
+
+        This test will fail if Ganga cannot find the job in the registry
+        or it cannot intialize the container with the desired Docker image
+        and mode.
+        """
+        from GangaCore.GPI import Job
+        j = Job(name="dockertest")
+        self.assertEqual(j.name, 'dockertest', "Something wrong with how\
+Job was imported or initialized.")
+        j.virtualization = Docker(image='fedora:latest', mode='P1')
+        self.assertEqual(j.virtualization.image, 'fedora:latest', "Docker\
+image was not passed correctly as an argument.")
+        self.assertEqual(j.virtualization.mode, 'P1', "Mode was not passed\
+correctly as an argument.")
+        j.submit()
+        sleep_until_completed(j)
+        j.remove()