added a test for pytorch and numpy

tests/src/test/scala/runtime/actionContainers/Python3AiActionContainerTests.scala

@@ -58,4 +58,37 @@ class Python3AiActionContainerTests extends PythonActionContainerTests with WskA
       runRes should be(Some(JsObject("response" -> List(5, 12, 21, 32).toJson)))
     }
   }
+
+  it should "run pytorch" in {
+    val (out, err) = withActionContainer() { c =>
+      val code =
+        """
+          |import torch
+          |import torchvision
+          |import torch.nn as nn
+          |import numpy as np
+          |import torchvision.transforms as transforms
+          |def main(args):
+          |   # Create a numpy array.
+          |   x = np.array([1,2,3,4])
+          |
+          |   # Convert the numpy array to a torch tensor.
+          |   y = torch.from_numpy(x)
+          |
+          |   # Convert the torch tensor to a numpy array.
+          |   z = y.numpy()
+          |   return { "response": z.tolist()}
+        """.stripMargin
+
+      val (initCode, res) = c.init(initPayload(code))
+      initCode should be(200)
+
+      val (runCode, runRes) = c.run(runPayload(JsObject()))
+      runCode should be(200)
+
+      runRes shouldBe defined
+      runRes should be(Some(JsObject("response" -> List(1, 2, 3, 4).toJson)))
+    }
+  }
+
 }