text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2018 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.
  */
  
  'use strict';
  
  // MODULES //
  
  var tape = require( 'tape' );
  var validate = require( './../lib/validate.js' );
  
  
  // TESTS //
  
  tape( 'main export is a function', function test( t ) {
  	t.ok( true, __filename );
  	t.equal( typeof validate, 'function', 'main export is a function' );
  	t.end();
  });
  
  tape( 'the function returns a type error if not provided an options object', function test( t ) {
  	var values;
  	var err;
  	var i;
  
  	values = [
  		'5',
  		5,
  		NaN,
  		true,
  		null,
  		void 0,
  		[],
  		function noop() {}
  	];
  
  	for ( i = 0; i < values.length; i++ ) {
  		err = validate( {}, values[i] );
  		t.equal( err instanceof TypeError, true, 'returns a TypeError when provided '+values[i] );
  	}
  	t.end();
  });
  
  tape( 'the function returns a type error if provided a `alpha` option which is not a positive `number`', function test( t ) {
  	var values;
  	var err;
  	var i;
  
  	values = [
  		-2.0,
  		0.0,
  		'5',
  		false,
  		NaN,
  		null,
  		void 0,
  		[],
  		{},
  		function noop() {}
  	];
  
  	for ( i = 0; i < values.length; i++ ) {
  		err = validate( {}, {
  			'alpha': values[i]
  		});
  		t.equal( err instanceof TypeError, true, 'returns a TypeError when provided '+values[i] );
  	}
  	t.end();
  });
  
  tape( 'the function returns a type error if provided a `beta` option which is not a positive `number`', function test( t ) {
  	var values;
  	var err;
  	var i;
  
  	values = [
  		-2.0,
  		0.0,
  		'5',
  		false,
  		NaN,
  		null,
  		void 0,
  		[],
  		{},
  		function noop() {}
  	];
  
  	for ( i = 0; i < values.length; i++ ) {
  		err = validate( {}, {
  			'beta': values[i]
  		});
  		t.equal( err instanceof TypeError, true, 'returns a TypeError when provided '+values[i] );
  	}
  	t.end();
  });
  
  tape( 'the function returns `null` if all options are valid', function test( t ) {
  	var expected;
  	var options;
  	var opts;
  	var err;
  
  	options = {
  		'alpha': 0.2,
  		'beta': 0.3
  	};
  	opts = {};
  
  	expected = {
  		'alpha': options.alpha,
  		'beta': options.beta
  	};
  
  	err = validate( opts, options );
  
  	t.equal( err, null, 'returns null' );
  	t.deepEqual( opts, expected, 'extracts options' );
  
  	t.end();
  });
  
  tape( 'the function ignores unrecognized options', function test( t ) {
  	var options;
  	var opts;
  	var err;
  
  	options = {
  		'beep': 'boop',
  		'foo': 5,
  		'bar': {}
  	};
  
  	opts = {};
  
  	err = validate( opts, options );
  
  	t.equal( err, null, 'returns null' );
  	t.deepEqual( opts, {}, 'ignores unrecognized options' );
  
  	t.end();
  });
  