Kindly review the code snippet provided below. The function getAllGroupIds() is designed to return an array of IDs belonging to "group" elements. The goal is to retrieve all the group-ids both before and after a test action, in order to compare them.
However, the code mentioned encounters a compilation error due to the line "groupIdsAfter.filter":
Error: Property 'filter' does not exist on type 'string'.ts(2339)
The issue arises from TypeScript assuming that getAllGroupIds function returns a Promise(string), overlooking the fact that "getAttribute" used with "element.all" actually yields an array of strings instead of a single string.
An attempt was made to set the function output to Promise(string[]), but this resulted in a different compilation error:
Error: Type 'Promise' is missing essential properties required by type 'Promise': [Symbol.toStringTag], finallyts(2739)
testCreateEmptyActivity2 = () =>
{
this.page.navigateTo().then(() =>
{
this.getAllGroupIds().then((groupIdsBefore) =>
{
console.log(groupIdsBefore);
// perform test action here
this.getAllGroupIds().then((groupIdsAfter) =>
{
console.log(groupIdsAfter);
let diff = groupIdsAfter.filter(e => !groupIdsBefore.includes(e));
console.log(diff);
});
});
browser.sleep(2000);
});
}
private getAllGroupIds = () =>
{
return element.all(by.css("rect.group")).getAttribute("id");
}