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test: migrate math/base/special/kernel-tan to ULP-based testing #12804

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test: migrate math/base/special/kernel-tan to ULP-based testing #12804

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45 changes: 10 additions & 35 deletions lib/node_modules/@stdlib/math/base/special/kernel-tan/test/test.native.js
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Original file line number Diff line number Diff line change
Expand Up @@ -24,8 +24,7 @@ var resolve = require( 'path' ).resolve;
var tape = require( 'tape' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var rempio2 = require( '@stdlib/math/base/special/rempio2' );
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 tryRequire = require( '@stdlib/utils/try-require' );


Expand Down Expand Up @@ -77,8 +76,6 @@ tape( 'the function returns `NaN` if provided `NaN` for `x` or `y`', opts, funct
tape( 'the function evaluates the tangent for input values inside of `[-pi/4, pi/4]`', opts, function test( t ) {
var expected;
var values;
var delta;
var tol;
var out;
var x;
var i;
Expand All @@ -88,24 +85,16 @@ tape( 'the function evaluates the tangent for input values inside of `[-pi/4, pi
for ( i = 0; i < values.length; i++ ) {
x = values[ i ];
out = kernelTan( x, 0.0, 1 );
if ( out === expected[ i ] ) {
t.strictEqual( out, expected[ i ], 'returns expected value' );
} else {
delta = abs( out - expected[ i ] );

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
tol = EPS * abs( expected[ i ] );
t.ok( delta <= tol, 'within tolerance. x: '+x+'. out: '+out+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
}

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
t.strictEqual( isAlmostSameValue( out, expected[ i ], 1 ), true, 'returns expected value' );
}
t.end();
});

tape( 'the function can be used to compute the tangent for input values outside of `[-pi/4, pi/4]` after argument reduction via `rempio2` (positive)', opts, function test( t ) {
var expected;
var values;
var delta;
var tol;
var out;
var x;
var y;
Expand All @@ -119,24 +108,16 @@ tape( 'the function can be used to compute the tangent for input values outside
x = values[ i ];
n = rempio2( x, y );
out = kernelTan( y[ 0 ], y[ 1 ], 1 - ( (n&1)<<1 ) );
if ( out === expected[ i ] ) {
t.strictEqual( out, expected[ i ], 'returns expected value' );
} else {
delta = abs( out - expected[ i ] );

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
tol = EPS * abs( expected[ i ] );
t.ok( delta <= tol, 'within tolerance. x: '+x+'. out: '+out+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
}

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
t.strictEqual( isAlmostSameValue( out, expected[ i ], 1 ), true, 'returns expected value' );
}
t.end();
});

tape( 'the function can be used to compute the tangent for input values outside of `[-pi/4, pi/4]` after argument reduction via `rempio2` (negative)', opts, function test( t ) {
var expected;
var values;
var delta;
var tol;
var out;
var x;
var y;
Expand All @@ -150,15 +131,9 @@ tape( 'the function can be used to compute the tangent for input values outside
x = values[ i ];
n = rempio2( x, y );
out = kernelTan( y[ 0 ], y[ 1 ], 1 - ( (n&1)<<1 ) );
if ( out === expected[ i ] ) {
t.strictEqual( out, expected[ i ], 'returns expected value' );
} else {
delta = abs( out - expected[ i ] );

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
tol = EPS * abs( expected[ i ] );
t.ok( delta <= tol, 'within tolerance. x: '+x+'. out: '+out+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
}

// NOTE: the tolerance here is larger than for the JavaScript implementation due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
t.strictEqual( isAlmostSameValue( out, expected[ i ], 1 ), true, 'returns expected value' );
}
t.end();
});