copy URLs and URLSearchParams

src/dubl.js

@@ -146,6 +146,19 @@ const duplicateArrayBuffer = arrBuff => new ArrayBuffer(arrBuff.length)
 const duplicateDataView = dv =>
     new DataView(dv.buffer, dv.byteOffset, dv.byteLength)
 
+/**
+ * Returns a copy of an object able to be built by a serializable string.
+ * 
+ * This is a higher order function that takes a construcutor and
+ * returns a function which will actually make the copy of an object.
+ * The one distinction is that the `param` must be serializable to a
+ * string and the constructor be able to create a copy from that string.
+ * 
+ * @param {Object} constructor 
+ * @returns {function}
+ */
+const duplicateSerializable = constructor => param => new constructor(param.toString())
+
 const duplicate = {
     [types.STRING]: identity,
     [types.NUMBER]: identity,
@@ -180,7 +193,9 @@ const duplicate = {
     [types.GENERATOR]: identity,
     [types.GENERATORFUNC]: duplicateFunction,
     [types.WASM]: identity,
-    [types.ASYNCFUNC]: duplicateFunction
+    [types.ASYNCFUNC]: duplicateFunction,
+    [types.URL]: duplicateSerializable(URL),
+    [types.URLPARAMS]: duplicateSerializable(URLSearchParams)
 }
 
 module.exports = {
@@ -196,5 +211,6 @@ module.exports = {
     duplicateTypedArray,
     duplicateArrayBuffer,
     duplicateDataView,
+    duplicateSerializable,
     duplicate
 };

test/test-dubl.js

@@ -15,7 +15,8 @@ const {
     duplicatePromise,
     duplicateTypedArray,
     duplicateArrayBuffer,
-    duplicateDataView
+    duplicateDataView,
+    duplicateSerializable
 } = require("../src/dubl");
 
 const expect = chai.expect;
@@ -492,5 +493,26 @@ describe("facsimile.js", function() {
             checkObjects(result, input, shouldDup);
         });
     });
+
+    describe("duplicateSerializable()", function() {
+        const duplicateURL = duplicateSerializable(URL);
+        const duplicateURLParams = duplicateSerializable(URLSearchParams);
+
+        it('Should duplicate a URL', function() {
+            const input = new URL('https://ryan:dabler@en.myurl.com:2200/dabler?test=a&b=type#hash')
+            const result = duplicateURL(input);
+
+            expect(result).to.not.equal(input);
+            expect(result.toString()).to.equal(input.toString());
+        });
+
+        it('Should duplicate URLSearchParams', function() {
+            const input = new URLSearchParams('test=a&b=type')
+            const result = duplicateURLParams(input);
+
+            expect(result).to.not.equal(input);
+            expect(result.toString()).to.equal(input.toString());
+        });
+    });
 });