text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2020 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 resolve = require( 'path' ).resolve;
  var tape = require( 'tape' );
  var PINF = require( '@stdlib/constants/math/float64-pinf' );
  var NINF = require( '@stdlib/constants/math/float64-ninf' );
  var lpad = require( '@stdlib/string/left-pad' );
  var pow = require( '@stdlib/math/base/special/pow' );
  var bits = require( '@stdlib/number/float64/base/to-binary-string' );
  var tryRequire = require( '@stdlib/utils/try-require' );
  
  
  // VARIABLES //
  
  var getLowWord = tryRequire( resolve( __dirname, './../lib/native.js' ) );
  var opts = {
  	'skip': ( getLowWord instanceof Error )
  };
  
  
  // TESTS //
  
  tape( 'main export is a function', opts, function test( t ) {
  	t.ok( true, __filename );
  	t.equal( typeof getLowWord, 'function', 'main export is a function' );
  	t.end();
  });
  
  tape( 'the function returns an integer', opts, function test( t ) {
  	var w = getLowWord( pow( 2, 53 ) );
  
  	t.equal( typeof w, 'number', 'returns a number' );
  	t.equal( w%1, 0, 'returns an integer' );
  
  	t.end();
  });
  
  tape( 'the function extracts a lower order word from a double-precision floating-point number', opts, function test( t ) {
  	var expected;
  	var values;
  	var low;
  	var v;
  	var w;
  	var i;
  
  	values = [
  		5,
  		pow( 2, 53 ),
  		1e308,
  		-1e308,
  		-3.14,
  		1e-324,
  		4.94e-324,
  		1.234567890123456789,
  		-4.94e-324,
  		6.333333333333333333e-310,
  		-0,
  		0,
  		100,
  		1/10,
  		0.625,
  		1/3,
  		5e-240,
  		-5e-240,
  		10,
  		15,
  		-10,
  		-15,
  		pow( 2, -42 ),
  		-pow( 2, 100 ),
  		1,
  		-1,
  		1.5,
  		1111111111111.111111111,
  		-1111111111111.111111111,
  		pow( 2, 54 ),
  		pow( 2, 53 ) + 1,
  		pow( 2, 53 ) + 2,
  		pow( 2, 55 ),
  		pow( 2, 56 ) - 1,
  		-pow( 2, 57 ) + 5,
  		3*pow( 2, 53 ),
  		8*pow( 2, 54 )
  	];
  
  	for ( i = 0; i < values.length; i++ ) {
  		v = values[ i ];
  		w = getLowWord( v );
  
  		// Convert to a binary string:
  		low = w.toString( 2 );
  		low = lpad( low, 32, '0' );
  
  		expected = bits( v ).substring( 32 );
  		t.equal( low, expected, 'low equals expected bit string for ' + v );
  	}
  	t.end();
  });
  
  tape( 'if provided `+infinity`, the lower order word is 0 (IEEE 754-1985)', opts, function test( t ) {
  	var w = getLowWord( PINF );
  	t.equal( w, 0, 'equals 0' );
  	t.end();
  });
  
  tape( 'if provided `-infinity`, the lower order word is 0 (IEEE 754-1985)', opts, function test( t ) {
  	var w = getLowWord( NINF );
  	t.equal( w, 0, 'equals 0' );
  	t.end();
  });
  