Refactor handlers to be in their own classes for easier maintainability

tests.sh

@@ -1,3 +1,11 @@
 #!/bin/bash
 
+set -eo pipefail
+
+# Run pytests
 poetry run pytest -vvvv --cov=jinjaturtle --cov-report=term-missing --disable-warnings
+
+# Ensure we test the CLI like a human
+for file in `ls -1 tests/samples/*`; do
+  poetry run jinjaturtle -r test $file -d test.yml -t test.j2
+done