I wrote cypress command with parameter and I would like to change it that function accept only certain values, e.g. I would like that columnValue can be only 'xxx' or 'yyy' or 'zzz'. How can I do it?
Cypress.Commands.add('addColumnAsDimension', (columnName: string) => {
chartMenu.addColumnButton.click();
chartMenu.columnNameButton(columnName).click();
chartMenu.addAsDimensionButton.click();
});You can use a union type for that:
type Column = 'xxx' | 'yyy' | 'zzz'
Cypress.Commands.add('addColumnAsDimension', (columnName: Column) => {
chartMenu.addColumnButton.click();
chartMenu.columnNameButton(columnName).click();
chartMenu.addAsDimensionButton.click();
});
Also, if you want the complier to check your custom Cypress method invocation, you have to add a type definition for the method as well:
declare namespace Cypress {
interface Chainable<Subject> {
addColumnAsDimension(columnName: Column): void
}
}
Now the compiler checks your arguments:
