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'use strict';
var test = require('tape');
var vm = require('vm');
var isError = require('../index.js');
test('isError is a function', function t(assert) {
assert.equal(typeof isError, 'function');
assert.end();
});
test('returns true for error', function t(assert) {
assert.equal(isError(new Error('foo')), true);
assert.equal(isError(Error('foo')), true);
assert.end();
});
test('returns false for non-error', function t(assert) {
assert.equal(isError(null), false);
assert.equal(isError(undefined), false);
assert.equal(isError({message: 'hi'}), false);
assert.equal(isError(true), false);
assert.equal(isError(false), false);
assert.equal(isError(1), false);
assert.equal(isError('string'), false);
assert.end();
});
test('errors that inherit from Error', function t(assert) {
var error = Object.create(new Error());
assert.equal(isError(error), true);
assert.end();
});
test('errors from other contexts', function t(assert) {
var error = vm.runInNewContext('new Error()');
assert.equal(isError(error), true);
assert.end();
});
test('errors that inherit from Error in another context', function t(assert) {
var error = vm.runInNewContext('Object.create(new Error())');
assert.equal(isError(error), true);
assert.end();
});
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