added unity files

tests/validation-samples/csharp/broken.cs

@@ -0,0 +1,7 @@
+public class ValidationSampleBroken
+{
+    public int Answer()
+    {
+        return 42
+    }
+}

tests/validation-samples/csharp/valid.cs

@@ -0,0 +1,7 @@
+public class ValidationSampleValid
+{
+    public int Answer()
+    {
+        return 42;
+    }
+}

tests/validation-samples/javascript/broken.js

@@ -0,0 +1 @@
+console.log("broken javascript sample"

tests/validation-samples/javascript/valid.js

@@ -0,0 +1 @@
+console.log("valid javascript sample");

tests/validation-samples/php/broken.php

@@ -0,0 +1,2 @@
+<?php
+echo "broken php sample"

tests/validation-samples/php/valid.php

@@ -0,0 +1,2 @@
+<?php
+echo "valid php sample";

tests/validation-samples/python/broken.py

@@ -0,0 +1 @@
+print("broken python sample"

tests/validation-samples/python/valid.py

@@ -0,0 +1 @@
+print("valid python sample")