ulp-based test for the betainc

Author: MANDEep22332

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

@@ -23,7 +23,7 @@
 var tape = require( 'tape' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var abs = require( '@stdlib/math/base/special/abs' );
-var EPS = require( '@stdlib/constants/float64/eps' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var betainc = require( './../lib' );
 
 
@@ -71,83 +71,83 @@ tape( 'the function returns `NaN` negative `a` or `b`', function test( t ) {
 
 tape( 'the function evaluates the lower regularized incomplete beta function', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
 	expected = lowerRegularized;
 	for ( i = 0; i < x.length; i++ ) {
 		y = betainc( x[i], a[i], b[i] );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+'. a: '+a[i]+'. b: '+b[i]+', expected: '+expected[i] );
+		if ( isnan( expected[ i ] ) ) {
+			t.strictEqual( isnan( y ), true, 'returns expected value' );
+		} else if ( expected[ i ] === 0.0 ) {
+			t.strictEqual( y, 0.0, 'returns expected value' );
+		} else if ( abs( expected[ i ] ) < 1e-300 ) {
+			t.ok( abs( y ) < 1e-300, 'returns expected value' );
 		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 50.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. a: '+a[i]+'. b: '+b[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. tol: '+tol );
+			t.strictEqual(isAlmostSameValue( y, expected[ i ], 120 ), true, 'returns expected value');
 		}
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the lower unregularized incomplete beta function', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
 	expected = lowerUnregularized;
 	for ( i = 0; i < x.length; i++ ) {
 		y = betainc( x[i], a[i], b[i], false );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+'. a: '+a[i]+'. b: '+b[i]+', expected: '+expected[i] );
+		if ( isnan( expected[ i ] ) ) {
+			t.strictEqual( isnan( y ), true, 'returns expected value' );
+		} else if ( abs( expected[ i ] ) < 1e-300 ) {
+			t.ok( abs( y ) < 1e-300, 'returns expected value' );
+		} else if ( expected[ i ] === Infinity || expected[ i ] === -Infinity ) {
+			t.strictEqual( y, expected[ i ], 'returns expected value' );
 		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 80.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. a: '+a[i]+'. b: '+b[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. tol: '+tol );
+			t.strictEqual(isAlmostSameValue( y, expected[ i ], 128 ), true, 'returns expected value');
 		}
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the upper regularized incomplete beta function', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
 	expected = upperRegularized;
 	for ( i = 0; i < x.length; i++ ) {
 		y = betainc( x[i], a[i], b[i], true, true );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+'. a: '+a[i]+'. b: '+b[i]+', expected: '+expected[i] );
+		if ( isnan( expected[ i ] ) ) {
+			t.strictEqual( isnan( y ), true, 'returns expected value' );
+		} else if ( abs( expected[ i ] ) < 1e-300 ) {
+			t.ok( abs( y ) < 1e-300, 'returns expected value' );
+		} else if ( expected[ i ] === Infinity || expected[ i ] === -Infinity ) {
+			t.strictEqual( y, expected[ i ], 'returns expected value' );
 		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 50.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. a: '+a[i]+'. b: '+b[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. tol: '+tol );
+			t.strictEqual(isAlmostSameValue( y, expected[ i ], 80 ), true, 'returns expected value');
 		}
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the upper unregularized incomplete beta function', function test( t ) {
 	var expected;
-	var delta;
-	var tol;
 	var i;
 	var y;
 
 	expected = upperUnregularized;
 	for ( i = 0; i < x.length; i++ ) {
 		y = betainc( x[i], a[i], b[i], false, true );
-		if ( y === expected[i] ) {
-			t.strictEqual( y, expected[i], 'x: '+x[i]+', y: '+y+'. a: '+a[i]+'. b: '+b[i]+', expected: '+expected[i] );
+		if ( isnan( expected[ i ] ) ) {
+			t.strictEqual( isnan( y ), true, 'returns expected value' );
+		} else if ( abs( expected[ i ] ) < 1e-300 ) {
+			t.ok( abs( y ) < 1e-300, 'returns expected value' );
+		} else if ( expected[ i ] === Infinity || expected[ i ] === -Infinity ) {
+			t.strictEqual( y, expected[ i ], 'returns expected value' );
 		} else {
-			delta = abs( y - expected[ i ] );
-			tol = 80.0 * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. a: '+a[i]+'. b: '+b[i]+'. y: '+y+'. E: '+expected[i]+'. Δ: '+delta+'. tol: '+tol );
+			t.strictEqual(isAlmostSameValue( y, expected[ i ], 120 ), true, 'returns expected value');
 		}
 	}
 	t.end();