Adding a manually written filters test for more specific testing.

The generated one is more for brute forcing compliance.

js/test_cases/filters/input1.json

@@ -0,0 +1,14 @@
+{
+  "string": "{\"foo\": \"bar\"}",
+  "integer": 4,
+  "float": 7.4,
+  "boolean": true,
+  "null": null,
+  "array": [
+    "foo",
+    "bar"
+  ],
+  "object": {
+    "foo": "bar"
+  }
+}

js/test_cases/filters/main.dust

@@ -0,0 +1,3 @@
+Object parsed: {string|jp}{~n}
+Object parsed and stringified: {string|jp|js}{~n}
+Object stringified and parsed: {string|js|jp}{~n}