Scaffold number/float32/base/signbit package files

lib/node_modules/@stdlib/number/float32/base/signbit/benchmark/benchmark.native.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2022 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 bench = require( '@stdlib/bench' );
+var randu = require( '@stdlib/random/base/randu' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var signbitf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( signbitf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+	var x;
+	var y;
+	var i;
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		x = ( randu()*1.0e7 ) - 5.0e6;
+		y = signbitf( toFloat32( x ) );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( y ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/number/float32/base/signbit/test/test.native.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2022 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 randu = require( '@stdlib/random/base/randu' );
+var round = require( '@stdlib/math/base/special/round' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var toFloat32 = require( '@stdlib/number/float64/base/to-float32' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+
+
+// VARIABLES //
+
+var signbitf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( signbitf instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+	t.ok( true, __filename );
+	t.equal( typeof signbitf, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function returns a boolean', opts, function test( t ) {
+	t.equal( typeof signbitf(5.0), 'boolean', 'returns a boolean' );
+	t.end();
+});
+
+tape( 'the function returns a boolean indicating if a sign bit is on (true) or off (false)', opts, function test( t ) {
+	var bool;
+	var sign;
+	var frac;
+	var exp;
+	var x;
+	var i;
+
+	for ( i = 0; i < 5000; i++ ) {
+		if ( randu() < 0.5 ) {
+			sign = -1.0;
+		} else {
+			sign = 1.0;
+		}
+		frac = randu() * 10.0;
+		exp = round( randu()*44.0 ) - 22;
+		x = sign * frac * pow( 10.0, exp );
+		x = toFloat32( x );
+		bool = signbitf( x );
+		if ( sign < 0.0 ) {
+			t.equal( bool, true, 'returns true for ' + x );
+		} else {
+			t.equal( bool, false, 'returns false for ' + x );
+		}
+	}
+	t.end();
+});