Add script to find and test all un-touched .dart files

.github/workflows/ci.yaml

@@ -38,6 +38,7 @@ jobs:
       - name: Run Unit Tests
         run: |
           cp lib/dummy_dsn.dart lib/dsn.dart
+          python3 find_dart_files.py
           flutter pub get
           flutter analyze
           flutter test --coverage

.gitignore

@@ -11,6 +11,9 @@
 
 coverage/*
 
+# This file is auto-generated as part of the CI process
+test/test_touch_files.dart
+
 # Sentry API key
 lib/dsn.dart
 

find_dart_files.py

@@ -0,0 +1,35 @@
+"""
+This script recursively finds any '.dart' files in the ./lib directory,
+and generates a 'test' file which includes all these files.
+
+This is to ensure that *all* .dart files are included in test coverage.
+By default, source files which are not touched by the unit tests are not included!
+
+Ref: https://github.com/flutter/flutter/issues/27997#issue-410722816
+"""
+
+from pathlib import Path
+
+if __name__ == '__main__':
+
+    dart_files = Path('lib').rglob('*.dart')
+
+    with open("test/test_touch_files.dart", "w") as f:
+
+        f.write("// ignore_for_file: unused_import\n\n")
+
+        for path in dart_files:
+            path = str(path)
+            # Remove leading 'lib\' text
+            path = path[4:]
+            path = path.replace('\\', '/')
+            f.write(f'import "package:inventree/{path}";\n')
+
+        f.write("\n\n")
+
+        f.write("// DO NOT EDIT THIS FILE - it has been auto-generated by 'find_dart_files.py'\n")
+        f.write("// It has been created to ensure that *all* source file are included in coverage data\n")
+        f.write("// Reference: https://github.com/flutter/flutter/issues/27997#issue-410722816\n\n")
+
+        f.write("// Do not actually test anything!")
+        f.write("void main() {}\n")