Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

test: add tests for C99 edge cases #6389

Merged
merged 4 commits into from
Apr 2, 2025
Merged

test: add tests for C99 edge cases #6389

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
daa14d9
chore: improve implementation and tests
anandkaranubc Mar 26, 2025
0f68b5c
Merge branch 'stdlib-js:develop' into fix/cabs
anandkaranubc Apr 2, 2025
ae3c95d
fix: update implementation to follow the C99 standard
anandkaranubc Apr 2, 2025
cc1f448
chore: remove extra linebreak
anandkaranubc Apr 2, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 0 additions & 1 deletion lib/node_modules/@stdlib/math/base/special/cabs/lib/main.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,6 @@ var imag = require( '@stdlib/complex/float64/imag' );
* // returns ~5.83
*/
function cabs( z ) {
// TODO: consider whether to use C99 rules for special cases involving infinities and nans (see https://github.com/python/cpython/blob/f4c03484da59049eb62a9bf7777b963e2267d187/Objects/complexobject.c#L191)
return hypot( real( z ), imag( z ) );
}

Expand Down
52 changes: 48 additions & 4 deletions lib/node_modules/@stdlib/math/base/special/cabs/test/test.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,8 @@
var tape = require( 'tape' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var EPS = require( '@stdlib/constants/float64/eps' );
var PINF = require( '@stdlib/constants/float64/pinf' );
var NINF = require( '@stdlib/constants/float64/ninf' );
var abs = require( '@stdlib/math/base/special/abs' );
var Complex128 = require( '@stdlib/complex/float64/ctor' );
var cabs = require( './../lib' );
Expand Down Expand Up @@ -67,17 +69,59 @@ tape( 'the function computes the absolute value of a complex number', function t
t.end();
});

tape( 'if either the real or imaginary component is `NaN`, the function returns `NaN`', function test( t ) {
tape( 'if either the real or imaginary component is `+infinity`, the function returns `+infinity`', function test( t ) {
var v;

v = cabs( new Complex128( PINF, 3.0 ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( 5.0, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( PINF, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NaN, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( PINF, NaN ) );
t.strictEqual( v, PINF, 'returns expected value' );

t.end();
});

tape( 'if either the real or imaginary component is `-infinity`, the function returns `+infinity`', function test( t ) {
var v;

v = cabs( new Complex128( NINF, 3.0 ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( 5.0, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NINF, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NaN, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NINF, NaN ) );
t.strictEqual( v, PINF, 'returns expected value' );

t.end();
});

tape( 'if either the real or imaginary component is `NaN` but not `+-infinity`, the function returns `NaN`', function test( t ) {
var v;

v = cabs( new Complex128( NaN, 3.0 ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

v = cabs( new Complex128( 5.0, NaN ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

v = cabs( new Complex128( NaN, NaN ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

t.end();
});
52 changes: 48 additions & 4 deletions lib/node_modules/@stdlib/math/base/special/cabs/test/test.native.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,8 @@ var resolve = require( 'path' ).resolve;
var tape = require( 'tape' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var EPS = require( '@stdlib/constants/float64/eps' );
var PINF = require( '@stdlib/constants/float64/pinf' );
var NINF = require( '@stdlib/constants/float64/ninf' );
var abs = require( '@stdlib/math/base/special/abs' );
var Complex128 = require( '@stdlib/complex/float64/ctor' );
var tryRequire = require( '@stdlib/utils/try-require' );
Expand Down Expand Up @@ -76,17 +78,59 @@ tape( 'the function computes the absolute value of a complex number', opts, func
t.end();
});

tape( 'if either the real or imaginary component is `NaN`, the function returns `NaN`', opts, function test( t ) {
tape( 'if either the real or imaginary component is `+infinity`, the function returns `+infinity`', opts, function test( t ) {
var v;

v = cabs( new Complex128( PINF, 3.0 ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( 5.0, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( PINF, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NaN, PINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( PINF, NaN ) );
t.strictEqual( v, PINF, 'returns expected value' );

t.end();
});

tape( 'if either the real or imaginary component is `-infinity`, the function returns `+infinity`', opts, function test( t ) {
var v;

v = cabs( new Complex128( NINF, 3.0 ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( 5.0, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NINF, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NaN, NINF ) );
t.strictEqual( v, PINF, 'returns expected value' );

v = cabs( new Complex128( NINF, NaN ) );
t.strictEqual( v, PINF, 'returns expected value' );

t.end();
});

tape( 'if either the real or imaginary component is `NaN` but not `+-infinity`, the function returns `NaN`', opts, function test( t ) {
var v;

v = cabs( new Complex128( NaN, 3.0 ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

v = cabs( new Complex128( 5.0, NaN ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

v = cabs( new Complex128( NaN, NaN ) );
t.strictEqual( isnan( v ), true, 'returns NaN' );
t.strictEqual( isnan( v ), true, 'returns expected value' );

t.end();
});