pass on replacer and space parameters to JSON.stringify

Author: rschick

README.md

@@ -34,6 +34,8 @@ this to/from storage.
 
 Create a parsing stream.
 
-### `jsonArrayStreams.stringify()`
+### `jsonArrayStreams.stringify([replacer, [space]])`
 
 Create a stringifying stream.
+
+replacer, space are optional parameters that are passed through to JSON.stringify, to support pretty-printing the output.

index.js

@@ -18,7 +18,7 @@ function createParseStream() {
 		});
 }
 
-function createStringifyStream() {
+function createStringifyStream(replacer, space) {
 	var first = true;
 	return through.obj(
 		function (value, enc, cb) {
@@ -29,7 +29,7 @@ function createStringifyStream() {
 			else {
 				this.push(",");
 			}
-			this.push(JSON.stringify(value));
+			this.push(JSON.stringify(value, replacer, space));
 			cb();
 		}, 
 		function (cb) {

test/json-array-streams.js

@@ -5,11 +5,11 @@ var through = require('through2');
 var jsonArrayStreams = require('../index');
 var Readable = require('stream').Readable;
 
-function createStringifyStream(dataCB) {
+function createStringifyStream(dataCB, replacer, space) {
 	var input = new Readable({objectMode: true});
 	input._read = function () {};
 	input
-		.pipe(jsonArrayStreams.stringify())
+		.pipe(jsonArrayStreams.stringify(replacer, space))
 		.pipe(through.obj(
 			function (chunk, enc, cb) {
 				dataCB(chunk);
@@ -92,3 +92,18 @@ test("stringify stream", function (t) {
 	});
 });
 
+test("with space", function (t) {
+	var result = "";
+	var input = createStringifyStream(function (chunk) {
+		result = result + chunk;
+	}, null, 2);
+
+	input.push({key: "value"});
+	input.push(null);
+
+	input.on('end', function () { 
+		t.equal(result, '[{\n  "key": "value"\n}]');
+		t.end(); 
+	});
+});
+