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* Install test dependencies. * Add initial test files. These files were created using a simplistic AST manipulator using `recast` to preserve formatting. There's bound to be a huge chunk of errors, but this serves as a good start. QUnit was replaced with Mocha, with ES2015 imports running via `esm`. As far as possible, QUnit-specific syntax has been replaced with Mocha's `describe` and `it`, while the native Node.js `assert` module is used for assertions. Files in the `test` directory ending in `.test.js` will be treated as test files. * Add initial passing files to test run.
56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { slice, errors, stubTrue, CustomError, realm } from './utils.js';
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import attempt from '../attempt.js';
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describe('attempt', function() {
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it('should return the result of `func`', function() {
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assert.strictEqual(attempt(lodashStable.constant('x')), 'x');
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});
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it('should provide additional arguments to `func`', function() {
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var actual = attempt(function() { return slice.call(arguments); }, 1, 2);
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assert.deepStrictEqual(actual, [1, 2]);
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});
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it('should return the caught error', function() {
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var expected = lodashStable.map(errors, stubTrue);
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var actual = lodashStable.map(errors, function(error) {
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return attempt(function() { throw error; }) === error;
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should coerce errors to error objects', function() {
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var actual = attempt(function() { throw 'x'; });
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assert.ok(lodashStable.isEqual(actual, Error('x')));
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});
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it('should preserve custom errors', function() {
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var actual = attempt(function() { throw new CustomError('x'); });
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assert.ok(actual instanceof CustomError);
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});
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it('should work with an error object from another realm', function() {
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if (realm.errors) {
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var expected = lodashStable.map(realm.errors, stubTrue);
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var actual = lodashStable.map(realm.errors, function(error) {
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return attempt(function() { throw error; }) === error;
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});
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assert.deepStrictEqual(actual, expected);
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}
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});
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it('should return an unwrapped value when implicitly chaining', function() {
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assert.strictEqual(_(lodashStable.constant('x')).attempt(), 'x');
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});
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it('should return a wrapped value when explicitly chaining', function() {
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assert.ok(_(lodashStable.constant('x')).chain().attempt() instanceof _);
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});
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});
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