test `conda install` in the default env in postBuild

tests/conda/default-env/postBuild

@@ -0,0 +1,5 @@
+#!/bin/bash
+# install pytest with conda in the default env (should be $KERNEL_PYTHON_PREFIX)
+conda install -yq pytest
+# install there with pip (should be the same)
+pip install there

tests/conda/default-env/verify

@@ -0,0 +1,2 @@
+#!/bin/sh
+pytest -v ./verify.py

tests/conda/default-env/verify.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+import os
+import sys
+
+
+def test_sys_prefix():
+    # verify that pytest was installed in the notebook env
+    assert sys.prefix == os.environ["KERNEL_PYTHON_PREFIX"]
+
+
+def test_there():
+    # verify that there was installed in the notebook env
+    import there