73 lines
2.0 KiB
TypeScript
73 lines
2.0 KiB
TypeScript
import {
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canBeCastAsIntegerOrNull,
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castAsIntegerOrNull,
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} from '../cast-as-integer-or-null';
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describe('canBeCastAsIntegerOrNull', () => {
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it(`should return true if null`, () => {
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expect(canBeCastAsIntegerOrNull(null)).toBeTruthy();
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});
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it(`should return true if number`, () => {
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expect(canBeCastAsIntegerOrNull(9)).toBeTruthy();
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});
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it(`should return true if empty string`, () => {
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expect(canBeCastAsIntegerOrNull('')).toBeTruthy();
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});
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it(`should return true if integer string`, () => {
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expect(canBeCastAsIntegerOrNull('9')).toBeTruthy();
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});
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it(`should return false if undefined`, () => {
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expect(canBeCastAsIntegerOrNull(undefined)).toBeFalsy();
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});
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it(`should return false if non numeric string`, () => {
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expect(canBeCastAsIntegerOrNull('9a')).toBeFalsy();
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});
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it(`should return false if non numeric string #2`, () => {
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expect(canBeCastAsIntegerOrNull('a9a')).toBeFalsy();
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});
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it(`should return false if float`, () => {
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expect(canBeCastAsIntegerOrNull(0.9)).toBeFalsy();
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});
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it(`should return false if float string`, () => {
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expect(canBeCastAsIntegerOrNull('0.9')).toBeFalsy();
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});
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});
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describe('castAsIntegerOrNull', () => {
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it(`should cast null to null`, () => {
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expect(castAsIntegerOrNull(null)).toBe(null);
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});
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it(`should cast empty string to null`, () => {
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expect(castAsIntegerOrNull('')).toBe(null);
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});
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it(`should cast an integer to an integer`, () => {
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expect(castAsIntegerOrNull(9)).toBe(9);
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});
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it(`should cast an integer string to an integer`, () => {
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expect(castAsIntegerOrNull('9')).toBe(9);
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});
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it(`should throw if trying to cast a float string to an integer`, () => {
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expect(() => castAsIntegerOrNull('9.9')).toThrow(Error);
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});
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it(`should throw if trying to cast a non numeric string to an integer`, () => {
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expect(() => castAsIntegerOrNull('9.9a')).toThrow(Error);
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});
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it(`should throw if trying to cast an undefined to an integer`, () => {
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expect(() => castAsIntegerOrNull(undefined)).toThrow(Error);
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});
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});
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