I am testing the encoding of url.search():

url = new URL("http://google.com/search/?q=\\")
url.search  // should result in  '?q=\\'

By writing a test where the first two strings are evaluated by the JS engine and the result is compared with the last string:
1    QTest::newRow("base case")
2            << "var url = new URL(\"http://www.google.com/searchq=\\\");"
3               "url.search"
4            << "?q=\\";
In this case I get an error from the engine parsing the string on line 2: "SyntaxError: Expected token `)'"


If I instead write: 
1    QTest::newRow("base case")
2            << "var url = new URL(\"http://www.google.com/search?q=\\ \");" // space added
3               "url.search"
4            << "?q=\\";
Then there is no parsing error.



Both inputs should be valid js strings to pass to the engine (even if the test itself may be wrong).