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test: migrate math/iter/utils/continued-fraction to ULP-based assertions #15621

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Merged
kgryte merged 1 commit into from
Sep 28, 2026
Merged

test: migrate math/iter/utils/continued-fraction to ULP-based assertions #15621

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103 changes: 13 additions & 90 deletions lib/node_modules/@stdlib/math/iter/utils/continued-fraction/test/test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,13 +21,12 @@
// MODULES //

var tape = require( 'tape' );
var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
var array2iterator = require( '@stdlib/array/to-iterator' );
var iterEmpty = require( '@stdlib/iter/empty' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var iterContinuedFractionSeq = require( '@stdlib/math/iter/sequences/continued-fraction' );
var PI = require( '@stdlib/constants/float64/pi' );
var abs = require( '@stdlib/math/base/special/abs' );
var EPS = require( '@stdlib/constants/float64/eps' );
var iterContinuedFraction = require( './../lib' );


Expand Down Expand Up @@ -158,8 +157,6 @@ tape( 'the function throws an error if provided an invalid option', function tes

tape( 'the function evaluates the terms of the continued fraction', function test( t ) {
var expected;
var delta;
var tol;
var it;
var v;

Expand All @@ -177,121 +174,61 @@ tape( 'the function evaluates the terms of the continued fraction', function tes
v = iterContinuedFraction( it );

expected = 3.245;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.25 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 2 ), true, 'returns expected value' );

it = array2iterator( [ -3, -4, -12, -4 ] );
v = iterContinuedFraction( it );

expected = -3.245;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.25 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 2 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( PI );
v = iterContinuedFraction( it );

expected = PI;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( -PI );
v = iterContinuedFraction( it );

expected = -PI;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = array2iterator( [ 0, 2 ] );
v = iterContinuedFraction( it );

expected = 0.5;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = array2iterator( [ 0, 10 ] );
v = iterContinuedFraction( it );

expected = 0.1;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( 0.3 );
v = iterContinuedFraction( it );

expected = 0.3;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 1 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( -0.5 );
v = iterContinuedFraction( it );

expected = -0.5;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( -0.3 );
v = iterContinuedFraction( it );

expected = -0.3;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 1 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( -0.1 );
v = iterContinuedFraction( it );

expected = -0.1;
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

t.end();
});
Expand Down Expand Up @@ -358,8 +295,6 @@ tape( 'the function supports specifying an iteration limit', function test( t )

tape( 'the function supports specifying a tolerance', function test( t ) {
var expected;
var delta;
var tol;
var it;
var v;

Expand All @@ -369,27 +304,15 @@ tape( 'the function supports specifying a tolerance', function test( t ) {
});

expected = 3.1415926530119025; // [ 3; 7, 15, 1, 292 ]
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

it = iterContinuedFractionSeq( -PI );
v = iterContinuedFraction( it, {
'tol': 1.0e-7
});

expected = -3.1415926530119025; // [ -3; -7, -15, -1, -292 ]
if ( v === expected ) {
t.strictEqual( v, expected, 'returns expected value' );
} else {
delta = abs( v - expected );
tol = 1.0 * EPS * abs( expected );
t.strictEqual( delta <= tol, true, 'actual: '+v+'. expected: '+expected+'. delta: '+delta+'. tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected, 0 ), true, 'returns expected value' );

t.end();
});
Expand Down
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