update test cases

Author: manu4543

src/index.ts

@@ -45,18 +45,7 @@ class ImageKit {
    * A static method to generate URL for the given transformation parameters. This method is useful when you want to generate URL without creating an instance of the SDK.
    */
   static url(urlOptions: UrlOptions & Required<Pick<ImageKitOptions, "urlEndpoint">> & Pick<ImageKitOptions, "transformationPosition">): string {
-    const options = urlOptions;
-    if (!options.urlEndpoint || options.urlEndpoint.length === 0) {
-      throw {
-        message: "urlEndpoint is required",
-      }
-    }
-    if (!options.src || options.src.length === 0) {
-      throw {
-        message: "src is required",
-      }
-    }
-    return buildURL(options);
+    return buildURL(urlOptions);
   }
 
   /**

src/url/builder.ts

@@ -26,16 +26,19 @@ function pathJoin(parts: string[], sep?: string) {
 }
 
 export const buildURL = (opts: UrlOptions & Required<Pick<ImageKitOptions, "urlEndpoint">> & Pick<ImageKitOptions, "transformationPosition">) => {
+  opts.urlEndpoint = opts.urlEndpoint || "";
+  opts.src = opts.src || "";
+  
   if (!opts.src) {
     return "";
   }
 
-  const isRelativePath = opts.src && opts.src.startsWith("/");
+  const isAbsoluteURL = opts.src.startsWith("http://") || opts.src.startsWith("https://");
 
   var urlObj, isSrcParameterUsedForURL, urlEndpointPattern;
 
   try {
-    if (isRelativePath) {
+    if (!isAbsoluteURL) {
       urlEndpointPattern = new URL(opts.urlEndpoint).pathname;
       urlObj = new URL(pathJoin([opts.urlEndpoint.replace(urlEndpointPattern, ""), opts.src]));
     } else {