tests: Auto-discover applications and try to switch to them

Currently `make check` doesn't test any not-default applications.
Fix this by automatically discovering constructors and ensure that the
application can be started and stopped without generating an exception.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

1 files changed, 25 insertions, 0 deletions

diff --git a/wasp/boards/simulator/conftest.py b/wasp/boards/simulator/conftest.py
new file mode 100644
index 0000000..ffd2344
--- /dev/null
+++ b/wasp/boards/simulator/conftest.py
@@ -0,0 +1,25 @@
+import glob
+import importlib
+import inspect
+import pytest
+
+def discover_app_constructors():
+    apps = []
+
+    globs = glob.glob('wasp/apps/*.py')
+    names = [ g[5:-3].replace('/', '.') for g in globs ]
+    modules = [ importlib.import_module(n) for n in names ]
+
+    for m in modules:
+        for sym in m.__dict__.keys():
+            if len(sym) > 3 and sym[-3:] == 'App':
+                constructor = m.__dict__[sym]
+                sig = inspect.signature(constructor)
+                if len(sig.parameters) == 0:
+                    apps.append(constructor)
+
+    return apps
+
+def pytest_generate_tests(metafunc):
+    if 'constructor' in metafunc.fixturenames:
+         metafunc.parametrize('constructor', discover_app_constructors())