test: add missing tests to ndarray/base/unary

PR-URL: #5821
Closes: stdlib-js/metr-issue-tracker#16
Reviewed-by: Athan Reines <[email protected]>

Author: headlessNode

lib/node_modules/@stdlib/ndarray/base/unary/test/test.0d.js

@@ -0,0 +1,89 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isSameComplex128Array = require( '@stdlib/assert/is-same-complex128array' );
+var isSameFloat64Array = require( '@stdlib/assert/is-same-float64array' );
+var Complex128Array = require( '@stdlib/array/complex128' );
+var Float64Array = require( '@stdlib/array/float64' );
+var Complex128 = require( '@stdlib/complex/float64/ctor' );
+var real = require( '@stdlib/complex/float64/real' );
+var imag = require( '@stdlib/complex/float64/imag' );
+var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var unary = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof unary, 'function', 'main export is a function');
+	t.end();
+});
+
+tape( 'the function applies a unary callback to each indexed element of a 0-dimensional ndarray', function test( t ) {
+	var expected;
+	var x;
+	var y;
+
+	x = scalar2ndarray( 5.0, {
+		'dtype': 'float64'
+	});
+
+	y = scalar2ndarray( 0.0, {
+		'dtype': 'float64'
+	});
+
+	unary( [ x, y ], scale );
+
+	expected = new Float64Array( [ 50.0 ] );
+	t.strictEqual( isSameFloat64Array( y.data, expected ), true, 'returns expected value' );
+	t.end();
+
+	function scale( x ) {
+		return x * 10.0;
+	}
+});
+
+tape( 'the function applies a unary callback to each indexed element of a 0-dimensional ndarray (accessors)', function test( t ) {
+	var expected;
+	var x;
+	var y;
+
+	x = scalar2ndarray( new Complex128( 5.0, 5.0 ), {
+		'dtype': 'complex128'
+	});
+
+	y = scalar2ndarray( new Complex128( 0.0, 0.0 ), {
+		'dtype': 'complex128'
+	});
+
+	unary( [ x, y ], scale );
+
+	expected = new Complex128Array( [ 50.0, 50.0 ] );
+	t.strictEqual( isSameComplex128Array( y.data, expected ), true, 'returns expected value' );
+	t.end();
+
+	function scale( z ) {
+		return new Complex128( real(z)*10.0, imag(z)*10.0 );
+	}
+});