tests: conda updates

conda.recipe/meta.yaml

@@ -12,12 +12,16 @@ build:
   script_env:
     - CC
     - CXX
-  script: {{ PYTHON }} -m pip install . -vvv
+  script: |
+    {{ PYTHON }} -m pip install -vvv "git+https://github.com/pybind/pybind11.git@master"
+    {{ PYTHON }} -m pip install . -vvv --no-deps
+    {{ PYTHON }} -m pip uninstall -y pybind11
 
 requirements:
   build:
     - {{ compiler('cxx') }}
     - vs2017_{{ target_platform }}    # [win]
+    - cmake
 
   host:
     - python
@@ -37,7 +41,7 @@ test:
   requires:
     - pytest
   commands:
-    - pytest .
+    - pytest
 
 about:
   summary: An example project built with pybind11.

tests/test.py

@@ -1,5 +1,6 @@
 import python_example as m
 
-assert m.__version__ == '0.0.1'
-assert m.add(1, 2) == 3
-assert m.subtract(1, 2) == -1
+def my_simple_test():
+    assert m.__version__ == '0.0.1'
+    assert m.add(1, 2) == 3
+    assert m.subtract(1, 2) == -1