Rework custom test machinery to give the individual tests more control

on how they're run, and combine environment.json and check.py

test/07_ssl/check.py

@@ -1,9 +0,0 @@
-import glob
-import subprocess
-import sys
-
-build_identifiers = subprocess.check_output([sys.executable, '-m', 'cibuildwheel', '--print-build-identifiers'], universal_newlines=True).strip().split('\n')
-expected_identifiers = build_identifiers
-built_wheels = glob.glob('wheelhouse/*.whl')
-
-assert len(built_wheels) == len(expected_identifiers)

test/07_ssl/cibuildwheel_test.py

@@ -0,0 +1,17 @@
+import subprocess, sys, os
+from glob import glob
+project_dir = os.path.dirname(__file__)
+sys.path.append(os.path.join(os.path.dirname(project_dir), 'shared'))
+import utils
+
+def test():
+    # this test checks that SSL is working in the build environment using
+    # some checks in setup.py.
+
+    # build the wheels
+    subprocess.check_call([sys.executable, '-m', 'cibuildwheel', project_dir])
+    
+    # check that we got the right number of built wheels
+    expected_identifiers = utils.cibuildwheel_get_build_identifiers(project_dir)
+    built_wheels = glob('wheelhouse/*.whl')
+    assert len(built_wheels) == len(expected_identifiers)