Add tests surrounding trim function used in wsdl parsing.

Use native string.trim instead of regex replace for performance.

remove log line.
fix quotes in tests.

src/wsdl/index.ts

@@ -23,11 +23,8 @@ const debug = debugBuilder('node-soap');
 
 const XSI_URI = 'http://www.w3.org/2001/XMLSchema-instance';
 
-const trimLeft = /^[\s\xA0]+/;
-const trimRight = /[\s\xA0]+$/;
-
-function trim(text) {
-  return text.replace(trimLeft, '').replace(trimRight, '');
+export function trim(text) {
+  return text.trim();
 }
 
 function deepMerge<A, B>(destination: A, source: B): A & B {

test/trim-test.js

@@ -0,0 +1,30 @@
+trim = require('../lib/wsdl/index.js').trim
+var assert = require('assert');
+
+it('should trim correctly', async () => {
+    describe('removes whitespace', async () => {
+        const input = ' \n <> \n  ';
+        const expected = '<>';
+
+        verify(input, expected);
+    })
+
+    describe('removes non breaking space', async () => {
+        const input = '\xA0<>';
+        const expected = '<>';
+
+        verify(input, expected);
+    });
+
+    describe('removes all', async () => {
+        const input = '\xA0\n \t<\n\t\xA0>\t \n \xA0';
+        const expected = '<\n\t\xA0>';
+
+        verify(input, expected);
+    });
+})
+
+function verify(input, expected) {
+    const actual = trim(input);
+    assert(actual === expected, `${actual} != ${expected}`);
+}