Update workflow for level1 challenge (#63)

# Purpose
Workflow should run on pushes and PRs. The workflow should fail if an
assertion fails.

.github/workflows/tests.yml

@@ -1,8 +1,6 @@
 name: level1-challenge-test
 
-on:
-  pull_request:
-    branches: [level1]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -11,7 +9,7 @@ jobs:
       pull-requests: write
     steps:
     - name: Checkout Repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Build Application
       run: make all
     - name: Run Tests

challenge.h

@@ -5,6 +5,6 @@
 
 #include <stdint.h>
 
-#define ASSERT(x) if (!(x)) { printf("ASSERTION FAILED: %s\n", #x); } else { printf("ASSERTION PASSED: %s\n", #x); }
+#define ASSERT(x) if (!(x)) { printf("ASSERTION FAILED: %s\n", #x); exit(1); } else { printf("ASSERTION PASSED: %s\n", #x); }
 
-#endif // CHALLENGE_H
+#endif // CHALLENGE_H