All files is-upper-case.ts

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const re = /^(\p{Lu})+$/u;
 
/**
 * Test a string for all upper case characters
 * @param input - string to test
 * @returns true, if all characters in the string are upper case
 * @group String
 * @category Categorization
 */
export function isUpperCase(input: string): boolean {
  return re.test(input);
}