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test: migrate stats/incr/mgmean to ULP-based assertions #15334

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test: migrate stats/incr/mgmean to ULP-based assertions #15334

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32 changes: 4 additions & 28 deletions lib/node_modules/@stdlib/stats/incr/mgmean/test/test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,7 @@
// MODULES //

var tape = require( 'tape' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var abs = require( '@stdlib/math/base/special/abs' );
var EPSILON = require( '@stdlib/constants/float64/eps' );
var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
var incrmgmean = require( './../lib' );


Expand Down Expand Up @@ -73,9 +71,7 @@ tape( 'the function returns an accumulator function', function test( t ) {
tape( 'the accumulator function computes a moving geometric mean incrementally', function test( t ) {
var expected;
var actual;
var delta;
var data;
var tol;
var acc;
var N;
var i;
Expand All @@ -100,24 +96,16 @@ tape( 'the accumulator function computes a moving geometric mean incrementally',
];

for ( i = 0; i < N; i++ ) {
if ( actual[ i ] === expected[ i ] ) {
t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
} else {
delta = abs( expected[ i ] - actual[ i ] );
tol = 1.2 * EPSILON * abs( expected[ i ] );
t.strictEqual( delta <= tol, true, 'within tolerance. Expected: '+expected[ i ]+'. Actual: '+actual[ i ]+'. Delta: '+delta+'. Tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( actual[ i ], expected[ i ], 2 ), true, 'returns expected value' );
}
t.end();
});

tape( 'if not provided an input value, the accumulator function returns the current geometric mean', function test( t ) {
var expected;
var actual;
var delta;
var data;
var acc;
var tol;
var i;

data = [ 2.0, 3.0, 5.0 ];
Expand All @@ -127,9 +115,7 @@ tape( 'if not provided an input value, the accumulator function returns the curr
}
actual = acc();
expected = 3.872983346207417; // Note: computed by hand using textbook formula
delta = abs( expected - actual );
tol = 1.0 * EPSILON * abs( expected );
t.strictEqual( delta <= tol, true, 'within tolerance. Expected: '+expected+'. Actual: '+actual+'. Delta: '+delta+'. Tol: '+tol+'.' );
t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
t.end();
});

Expand All @@ -141,10 +127,8 @@ tape( 'if data has yet to be provided, the accumulator function returns `null`',

tape( 'if provided `NaN`, the accumulated value is `NaN` for at least `W` invocations', function test( t ) {
var expected;
var delta;
var data;
var acc;
var tol;
var v;
var i;

Expand Down Expand Up @@ -194,15 +178,7 @@ tape( 'if provided `NaN`, the accumulated value is `NaN` for at least `W` invoca
];
for ( i = 0; i < data.length; i++ ) {
v = acc( data[ i ] );
if ( isnan( expected[ i ] ) ) {
t.strictEqual( isnan( v ), true, 'returns expected value for window '+i );
} else if ( v === expected[ i ] ) {
t.strictEqual( v, expected[ i ], 'returns expected value for window '+i );
} else {
delta = abs( expected[ i ] - v );
tol = 1.0 * EPSILON * abs( expected[ i ] );
t.strictEqual( delta <= tol, true, 'within tolerance for window '+i+'. Expected: '+expected[ i ]+'. Actual: '+v+'. Delta: '+delta+'. Tol: '+tol+'.' );
}
t.strictEqual( isAlmostSameValue( v, expected[ i ], 1 ), true, 'returns expected value for window '+i );
}
t.end();
});
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