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/*
* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import iterEveryBy = require( './index' );
/**
* Returns an iterator protocol-compliant object.
*
* @returns iterator protocol-compliant object
*/
function iterator() {
return {
'next': next
};
/**
* Implements the iterator protocol `next` method.
*
* @returns iterator protocol-compliant object
*/
function next() {
return {
'value': true,
'done': false
};
}
}
/**
* Predicate function.
*
* @param _v - iterated value
* @param i - iteration index
* @returns a boolean
*/
function predicate1( _v: any, i: number ): boolean { // tslint:disable-line:variable-name
return ( i >= 0 );
}
/**
* Predicate function.
*
* @param v - iterated value
* @returns a boolean
*/
function predicate2( v: any ): boolean {
return ( v !== v );
}
// TESTS //
// The function returns a boolean...
{
iterEveryBy( iterator(), predicate1 ); // $ExpectType boolean
iterEveryBy( iterator(), predicate2 ); // $ExpectType boolean
iterEveryBy( iterator(), predicate1, {} ); // $ExpectType boolean
iterEveryBy( iterator(), predicate2, {} ); // $ExpectType boolean
iterEveryBy( iterator(), predicate1, null ); // $ExpectType boolean
iterEveryBy( iterator(), predicate2, null ); // $ExpectType boolean
}
// The compiler throws an error if the function is provided a first argument which is not an iterator protocol-compliant object...
{
iterEveryBy( '5', predicate1 ); // $ExpectError
iterEveryBy( 5, predicate1 ); // $ExpectError
iterEveryBy( true, predicate1 ); // $ExpectError
iterEveryBy( false, predicate1 ); // $ExpectError
iterEveryBy( null, predicate1 ); // $ExpectError
iterEveryBy( undefined, predicate1 ); // $ExpectError
iterEveryBy( [], predicate1 ); // $ExpectError
iterEveryBy( {}, predicate1 ); // $ExpectError
iterEveryBy( ( x: number ): number => x, predicate1 ); // $ExpectError
}
// The compiler throws an error if the function is provided a second argument which is not a predicate function...
{
iterEveryBy( iterator(), '5' ); // $ExpectError
iterEveryBy( iterator(), 5 ); // $ExpectError
iterEveryBy( iterator(), true ); // $ExpectError
iterEveryBy( iterator(), false ); // $ExpectError
iterEveryBy( iterator(), null ); // $ExpectError
iterEveryBy( iterator(), undefined ); // $ExpectError
iterEveryBy( iterator(), [] ); // $ExpectError
iterEveryBy( iterator(), {} ); // $ExpectError
iterEveryBy( iterator(), ( x: number ): number => x ); // $ExpectError
}
// The compiler throws an error if the function is provided insufficient arguments...
{
iterEveryBy(); // $ExpectError
iterEveryBy( iterator() ); // $ExpectError
}
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