"added test.js"

Author: RiyaChy072

lib/node_modules/@stdlib/math/base/special/cosc/test/test.js

@@ -0,0 +1,188 @@
+/**
+* @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 isnan = require( '@stdlib/math/base/assert/is-nan' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var abs = require( '@stdlib/math/base/special/abs' );
+var cosc = require( './../lib' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+var largeNegative = require( './fixtures/julia/large_negative.json' );
+var largePositive = require( './fixtures/julia/large_positive.json' );
+var tinyNegative = require( './fixtures/julia/tiny_negative.json' );
+var tinyPositive = require( './fixtures/julia/tiny_positive.json' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof sinc, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function computes the derivative of cardinal sine', function test( t ) {
+	var expected;
+	var delta;
+	var tol;
+	var x;
+	var y;
+	var i;
+
+	x = data.x;
+	expected = data.expected;
+
+	for ( i = 0; i < x.length; i++ ) {
+		y = cosc( x[i] );
+		if ( y === expected[ i ] ) {
+			t.equal( y, expected[ i ], 'x: '+x[i]+'. Expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[i] );
+			tol = 2.0 * EPS * abs( expected[i] );
+			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y+'. Expected: '+expected[i]+'. Tolerance: '+tol+'.' );
+		}
+	}
+	t.end();
+});
+
+tape( 'the function computes the derivative of cardinal sine (large negative)', function test( t ) {
+	var expected;
+	var delta;
+	var tol;
+	var x;
+	var y;
+	var i;
+
+	x = largeNegative.x;
+	expected = largeNegative.expected;
+
+	for ( i = 0; i < x.length; i++ ) {
+		y = cosc( x[i] );
+		if ( y === expected[ i ] ) {
+			t.equal( y, expected[ i ], 'x: '+x[i]+'. Expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[i] );
+			tol = 2.0 * EPS * abs( expected[i] );
+			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y+'. Expected: '+expected[i]+'. Tolerance: '+tol+'.' );
+		}
+	}
+	t.end();
+});
+
+tape( 'the function computes the derivative of cardinal sine (large positive)', function test( t ) {
+	var expected;
+	var delta;
+	var tol;
+	var x;
+	var y;
+	var i;
+
+	x = largePositive.x;
+	expected = largePositive.expected;
+
+	for ( i = 0; i < x.length; i++ ) {
+		y = cosc( x[i] );
+		if ( y === expected[ i ] ) {
+			t.equal( y, expected[ i ], 'x: '+x[i]+'. Expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[i] );
+			tol = 2.0 * EPS * abs( expected[i] );
+			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y+'. Expected: '+expected[i]+'. Tolerance: '+tol+'.' );
+		}
+	}
+	t.end();
+});
+
+tape( 'the function computes the derivative of cardinal sine (tiny negative)', function test( t ) {
+	var expected;
+	var delta;
+	var tol;
+	var x;
+	var y;
+	var i;
+
+	x = tinyNegative.x;
+	expected = tinyNegative.expected;
+
+	for ( i = 0; i < x.length; i++ ) {
+		y = cosc( x[i] );
+		if ( y === expected[ i ] ) {
+			t.equal( y, expected[ i ], 'x: '+x[i]+'. Expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[i] );
+			tol = EPS * abs( expected[i] );
+			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y+'. Expected: '+expected[i]+'. Tolerance: '+tol+'.' );
+		}
+	}
+	t.end();
+});
+
+tape( 'the function computes the derivative of cardinal sine (tiny positive)', function test( t ) {
+	var expected;
+	var delta;
+	var tol;
+	var x;
+	var y;
+	var i;
+
+	x = tinyPositive.x;
+	expected = tinyPositive.expected;
+
+	for ( i = 0; i < x.length; i++ ) {
+		y = cosc( x[i] );
+		if ( y === expected[ i ] ) {
+			t.equal( y, expected[ i ], 'x: '+x[i]+'. Expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[i] );
+			tol = EPS * abs( expected[i] );
+			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y+'. Expected: '+expected[i]+'. Tolerance: '+tol+'.' );
+		}
+	}
+	t.end();
+});
+
+tape( 'the function returns `NaN` if provided a `NaN`', function test( t ) {
+	var v = cosc( NaN );
+	t.equal( isnan( v ), true, 'returns NaN' );
+	t.end();
+});
+
+tape( 'the function returns `0.0` if provided `0.0`', function test( t ) {
+	var v = cosc( 0.0 );
+	t.equal( v, 0.0, 'returns 0.0' );
+	t.end();
+});
+
+tape( 'the function returns `0.0` if provided positive or negative infinity', function test( t ) {
+	var v = cosc( PINF );
+	t.equal( v, 0.0, 'returns 0.0' );
+
+	v = cosc( NINF );
+	t.equal( v, 0.0, 'returns 0.0' );
+	t.end();
+});