abc-notation-transposition/tests/unit/funcs/string-utils/string-utils.test.js

A robust utility for transposing ABC Notation by half steps.

const {isUpperCase, includesIgnoreCase, trimNewLines} = require('../../../../functions/string-utils');

test('Expect isUpperCase to return true for an uppercase String.', () => {
    expect(isUpperCase("TESTING")).toBe(true);
});

test('Expect isUpperCase to return false for a string that includes lowercase letters', () => {
    expect(isUpperCase("This should be false.")).toBe(false);
});

test('Expect includesIgnoreCase to return true for a string which includes a substring', () => {
    expect(includesIgnoreCase('This is a string', 'STRING')).toBe(true);
});

test('Expect includesIgnoreCase to return false for a string which does not include a substring', () => {
    expect(includesIgnoreCase('This is a string', 'foo')).toBe(false);
});

test('Expect trimNewLines to trim new line characters but leave the original string intact.', () => {
    const base = 'This should be preserved.';
    expect(trimNewLines(base)).toBe(base);
    expect(trimNewLines(base + '\n')).toBe(base);
    expect(trimNewLines('\n' + base)).toBe(base);
    expect(trimNewLines('\n' + base + '\n')).toBe(base);
});