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substring.js
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38 lines (34 loc) · 1.21 KB
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import { PRINTABLE_ASCII } from '../const';
import v from '../voca';
describe('substring', function() {
it('should substring a string', function() {
expect(v.substring('infinite loop', 9)).toBe('loop');
expect(v.substring('infinite loop', 0)).toBe('infinite loop');
expect(v.substring('infinite loop')).toBe('infinite loop');
expect(v.substring('infinite loop', 1)).toBe('nfinite loop');
expect(v.substring(PRINTABLE_ASCII, 0)).toBe(PRINTABLE_ASCII);
});
it('should substring a string with an end position', function() {
expect(v.substring('infinite loop', 9, 12)).toBe('loo');
expect(v.substring('infinite loop', 0, 'infinite loop'.length)).toBe('infinite loop');
expect(v.substring('infinite loop', 1, 2)).toBe('n');
});
it('should substring a string representation of an object', function() {
expect(v.substring(['infinite loop'], 10)).toBe('oop');
expect(
v.substring(
{
toString: function() {
return 'loop';
},
},
0,
3
)
).toBe('loo');
});
it('should substring a string from a number', function() {
expect(v.substring(12345, 3)).toBe('45');
expect(v.substring(987, 1, 2)).toBe('8');
});
});