Ported rest of Code ops & enabled/fixed some tests

src/core/operations/JSONMinify.mjs

@@ -0,0 +1,41 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import vkbeautify from "vkbeautify";
+import Operation from "../Operation";
+
+/**
+ * JSON Minify operation
+ */
+class JSONMinify extends Operation {
+
+    /**
+     * JSONMinify constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JSON Minify";
+        this.module = "Code";
+        this.description = "Compresses JavaScript Object Notation (JSON) code.";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        if (!input) return "";
+        return vkbeautify.jsonmin(input);
+    }
+
+}
+
+export default JSONMinify;