import { describe, it, expect } from 'vitest';
import { assertDefined, assertNever } from '../../src/utils/assert.js';
describe('Assert Utilities', () => {
describe('assertDefined', () => {
it('should return the value when defined', () => {
expect(assertDefined('hello', 'should be defined')).toBe('hello');
expect(assertDefined(0, 'should be defined')).toBe(0);
expect(assertDefined(false, 'should be defined')).toBe(false);
expect(assertDefined('', 'should be defined')).toBe('');
});
it('should return objects when defined', () => {
const obj = { foo: 'bar' };
expect(assertDefined(obj, 'should be defined')).toBe(obj);
});
it('should return arrays when defined', () => {
const arr = [1, 2, 3];
expect(assertDefined(arr, 'should be defined')).toBe(arr);
});
it('should throw when value is null', () => {
expect(() => assertDefined(null, 'value was null')).toThrow(
'Assertion failed: value was null'
);
});
it('should throw when value is undefined', () => {
expect(() => assertDefined(undefined, 'value was undefined')).toThrow(
'Assertion failed: value was undefined'
);
});
it('should include custom message in error', () => {
expect(() => assertDefined(null, 'Analysis should be populated')).toThrow(
'Assertion failed: Analysis should be populated'
);
});
});
describe('assertNever', () => {
it('should throw with default message', () => {
const value = 'unexpected' as never;
expect(() => assertNever(value)).toThrow(
'Unexpected value: "unexpected"'
);
});
it('should throw with custom message', () => {
const value = 'bad' as never;
expect(() => assertNever(value, 'Invalid state reached')).toThrow(
'Invalid state reached'
);
});
it('should stringify objects in default message', () => {
const value = { type: 'unknown' } as never;
expect(() => assertNever(value)).toThrow(
'Unexpected value: {"type":"unknown"}'
);
});
});
});
