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test: add tests to achieve full coverage in beta and betaln
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‎lib/node_modules/@stdlib/math/base/special/beta/test/test.js‎

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@@ -21,6 +21,7 @@
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// MODULES //
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var tape = require( 'tape' );
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var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
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var isInfinite = require( '@stdlib/math/base/assert/is-infinite' );
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var isnan = require( '@stdlib/assert/is-nan' );
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var abs = require( '@stdlib/math/base/special/abs' );
@@ -123,3 +124,49 @@ tape( 'the function evaluates the beta function (tested against Boost)', functio
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}
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t.end();
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});
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tape( 'the function handles edge case where a+b < EPS', function test( t ) {
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var v;
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// Test case where c = a + b < EPS
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v = beta( EPS/4.0, EPS/4.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function handles edge case where c = a and b < EPS', function test( t ) {
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var v;
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v = beta( 10.0, EPS/2.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = beta( 100.0, EPS/3.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function handles large values where abs(b*ambh) < (cgh*100) && a > 100', function test( t ) { // eslint-disable-line @cspell/spellchecker
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var v;
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v = beta( 150.0, 0.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = beta( 200.0, 1.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function handles very large values where cgh > 1.0e10', function test( t ) {
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var v;
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v = beta( 1.0e10, 1.0e10 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = beta( 5.0e10, 2.0e10 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/math/base/special/beta/test/test.lanczos_sum_expg_scaled.js‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,86 @@
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var tape = require( 'tape' );
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var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
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var PINF = require( '@stdlib/constants/float64/pinf' );
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var rational = require( './../lib/lanczos_sum_expg_scaled.js' );
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// TESTS //
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tape( 'main export is a function', function test( t ) {
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t.ok( true, __filename );
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t.strictEqual( typeof rational, 'function', 'main export is a function' );
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t.end();
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});
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tape( 'the function returns `Infinity` for x = 0', function test( t ) {
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var v = rational( 0.0 );
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t.strictEqual( v, PINF, 'returns expected value' );
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t.end();
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});
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tape( 'the function evaluates a rational function for positive values less than 1', function test( t ) {
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var v;
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v = rational( 0.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( 0.1 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( 0.9 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function evaluates a rational function for positive values greater than 1', function test( t ) {
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var v;
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v = rational( 1.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( 2.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( 10.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function evaluates a rational function for negative values', function test( t ) {
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var v;
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v = rational( -0.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( -1.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = rational( -2.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/math/base/special/betaln/test/test.dceval.js‎

Lines changed: 35 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
@@ -21,7 +21,8 @@
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// MODULES //
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var tape = require( 'tape' );
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var isnan = require( '@stdlib/assert/is-nan' );
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var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var dceval = require( './../lib/dceval.js' );
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@@ -33,18 +34,41 @@ tape( 'main export is a function', function test( t ) {
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t.end();
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});
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tape( 'the function returns `NaN` if provided `x` outside `[-1.1,1.1]`', function test( t ) {
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var y = dceval( 1.5, [1, 2, 3] );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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tape( 'the function evaluates the Chebyshev series for values in [-1.1, 1.1]', function test( t ) {
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var v;
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y = dceval( 1.11, [1, 2, 3] );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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v = dceval( 0.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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y = dceval( -1.11, [1, 2, 3] );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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v = dceval( 0.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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y = dceval( -1.5, [1, 2, 3] );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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v = dceval( -0.5 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = dceval( 1.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = dceval( -1.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns NaN for values outside [-1.1, 1.1]', function test( t ) {
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var v;
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v = dceval( -1.2 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = dceval( 1.2 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = dceval( -2.0 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = dceval( 2.0 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/math/base/special/betaln/test/test.gamma_correction.js‎

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@@ -0,0 +1,94 @@
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var tape = require( 'tape' );
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var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var gammaCorrection = require( './../lib/gamma_correction.js' );
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// TESTS //
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tape( 'main export is a function', function test( t ) {
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t.ok( true, __filename );
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t.strictEqual( typeof gammaCorrection, 'function', 'main export is a function' );
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t.end();
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});
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tape( 'the function returns NaN for x < 10', function test( t ) {
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var v;
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v = gammaCorrection( 5.0 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = gammaCorrection( 9.9 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = gammaCorrection( 0.0 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns 0 for x >= XMAX', function test( t ) {
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var XMAX = 3.745194030963158e306;
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var v;
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v = gammaCorrection( XMAX );
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t.strictEqual( v, 0.0, 'returns 0' );
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v = gammaCorrection( XMAX * 2.0 );
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t.strictEqual( v, 0.0, 'returns 0' );
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t.end();
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});
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tape( 'the function evaluates gamma correction for 10 <= x < XBIG', function test( t ) {
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var v;
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v = gammaCorrection( 10.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = gammaCorrection( 100.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = gammaCorrection( 1000.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function evaluates gamma correction for x >= XBIG', function test( t ) {
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var XBIG = 94906265.62425156;
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var v;
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v = gammaCorrection( XBIG );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = gammaCorrection( XBIG * 2.0 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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v = gammaCorrection( 1.0e10 );
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t.strictEqual( isNumber( v ), true, 'returns expected value' );
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t.end();
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});

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

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Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@ var tape = require( 'tape' );
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var isInfinite = require( '@stdlib/math/base/assert/is-infinite' );
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var isnan = require( '@stdlib/assert/is-nan' );
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var PINF = require( '@stdlib/constants/float64/pinf' );
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var NINF = require( '@stdlib/constants/float64/ninf' );
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var EPS = require( '@stdlib/constants/float64/eps' );
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var abs = require( '@stdlib/math/base/special/abs' );
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var betaln = require( './../lib' );
@@ -103,3 +104,15 @@ tape( 'the function evaluates the natural logarithm of the beta function', funct
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}
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t.end();
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});
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tape( 'the function returns -Infinity when q = Infinity', function test( t ) {
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var v;
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v = betaln( 1.0, PINF );
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t.strictEqual( v, NINF, 'returns expected value' );
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v = betaln( 5.0, PINF );
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t.strictEqual( v, NINF, 'returns expected value' );
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t.end();
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});

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