Test against a mocked server

Environment variables can be used to test against a real deployment.

I now just check if the file is executable rather than trying to
actually execute it since we would need to actually compile something
that can run as a .exe on Windows.

Author: code-asher

src/test/groovy/CoderCLIManagerTest.groovy

@@ -26,7 +26,7 @@ class CoderCLIManagerTest extends spock.lang.Specification {
         srv.createContext("/", new HttpHandler() {
             void handle(HttpExchange exchange) {
                 int code = HttpURLConnection.HTTP_OK
-                byte[] response = "!#/bin/sh\r\necho Coder".getBytes()
+                byte[] response = "#!/bin/sh\r\necho Coder".getBytes()
                 int length = response.length
 
                 String[] etags = exchange.requestHeaders.get("If-None-Match")