test: add initial ndarray tests

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: aayush0325

lib/node_modules/@stdlib/lapack/base/dppequ/lib/ndarray.js

@@ -43,6 +43,7 @@ var base = require( './base.js' );
 * @param {integer} strideOut - stride length for `out`
 * @param {integer} offsetOut - starting index for `out`
 * @throws {TypeError} first argument must be a valid order
+* @throws {RangeError} third argument must be a nonnegative integer
 * @returns {integer} status code
 *
 * @example
@@ -60,6 +61,9 @@ function dppequ( order, uplo, N, AP, strideAP, offsetAP, S, strideS, offsetS, ou
 	if ( !isLayout( order ) ) {
 		throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
 	}
+	if ( N < 0 ) {
+		throw new RangeError( format( 'invalid argument. First argument must be a nonnegative integer. Value: `%d`.', N ) );
+	}
 	return base( order, uplo, N, AP, strideAP, offsetAP, S, strideS, offsetS, out, strideOut, offsetOut ); // eslint-disable-line max-len
 }
 

lib/node_modules/@stdlib/lapack/base/dppequ/test/test.ndarray.js

@@ -0,0 +1,109 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 Float64Array = require( '@stdlib/array/float64' );
+var dppequ = require( './../lib/ndarray.js' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof dppequ, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function has an arity of 12', function test( t ) {
+	t.strictEqual( dppequ.length, 12, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function throws an error if provided an invalid third argument', function test( t ) {
+	var values;
+	var out;
+	var AP;
+	var S;
+	var i;
+
+	values = [
+		-1,
+		-2,
+		-3,
+		-4,
+		-5
+	];
+
+	AP = new Float64Array( [ 1.0, 2.0, 3.0, 5.0, 6.0, 9.0 ] );
+	S = new Float64Array( 3 );
+	out = new Float64Array( 2 );
+
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[ i ] ), RangeError, 'throws an error when provided ' + values[ i ] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			dppequ( 'row-major', 'L', value, AP, 1, 0, S, 1, 0, out, 1, 0 );
+		};
+	}
+});
+
+tape( 'the function throws an error if provided a first argument which is not a valid order', function test( t ) {
+	var values;
+	var out;
+	var AP;
+	var S;
+	var i;
+
+	values = [
+		'foo',
+		'bar',
+		'beep',
+		'boop',
+		-5,
+		NaN,
+		true,
+		false,
+		null,
+		void 0,
+		[],
+		{},
+		function noop() {}
+	];
+
+	AP = new Float64Array( [ 1.0, 2.0, 3.0, 5.0, 6.0, 9.0 ] );
+	S = new Float64Array( 3 );
+	out = new Float64Array( 2 );
+
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			dppequ( value, 'L', 3, AP, 1, 0, S, 1, 0, out, 1, 0 );
+		};
+	}
+});