test: Migrate NDV tests from Cypress -> Playwright (#19148)

packages/testing/playwright/fixtures/Dummy_javascript.txt

@@ -0,0 +1,42 @@
+var File = function(url, object){
+	File.list = Array.isArray(File.list)? File.list : [];
+	File.progress = File.progress || 0;
+	this.progress = 0;
+	this.object = object;
+	this.url = url;
+};
+
+File.indexOf = function(term){
+	for(var index in File.list){
+		var file = File.list[index];
+		if (file.equals(term) || file.url === term || file.object === term) {
+			return index;
+		}
+	}
+	return -1;
+};
+
+File.find = function(term){
+	var index = File.indexOf(term);
+	return ~index && File.list[index];
+};
+
+File.prototype.equals = function(file){
+	var isFileType = file instanceof File;
+	return isFileType && this.url === file.url && this.object === file.object;
+};
+
+File.prototype.save = function(update){
+	update = typeof update === 'undefined'? true : update;
+	if(Array.isArray(File.list)){
+		var index = File.indexOf(this);
+		if(~index && update) {
+			File.list[index] = this;
+			console.warn('File `%s` has been loaded before and updated now for: %O.', this.url, this);
+		}else File.list.push(this);
+		console.log(File.list)
+	}else{
+		File.list = [this];
+	}
+	return this;
+};