More tests and error handling

.vscode/launch.json

@@ -4,6 +4,22 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+            "name": "Debug test script",
+            "type": "php",
+            "request": "launch",
+            "program": "",
+            "cwd": "${workspaceFolder}",
+            "port": 0,
+            "args": ["vendor/bin/phpunit", "${file}"],
+            "runtimeArgs": [
+                "-dxdebug.start_with_request=yes"
+            ],
+            "env": {
+                "XDEBUG_MODE": "debug,develop",
+                "XDEBUG_CONFIG": "client_port=${port}"
+            }
+        },
         {
             "name": "Launch currently open script",
             "type": "php",