test: more tests

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---

Author: aayush0325

lib/node_modules/@stdlib/lapack/base/iladlr/examples/index.js

@@ -0,0 +1,34 @@
+/**
+* @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';
+
+var ndarray2array = require( '@stdlib/ndarray/base/to-array' );
+var Float64Array = require( '@stdlib/array/float64' );
+var shape2strides = require( '@stdlib/ndarray/base/shape2strides' );
+var iladlr = require( './../lib' );
+
+var shape = [ 3, 3 ];
+var order = 'row-major';
+var strides = shape2strides( shape, order );
+
+var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 0.0, 0.0, 0.0 ] );
+console.log( ndarray2array( A, shape, strides, 0, order ) );
+
+var out = iladlr( order, shape[ 0 ], shape[ 1 ], A, strides[ 0 ] );
+console.log( out );

lib/node_modules/@stdlib/lapack/base/iladlr/test/test.iladlr.js

@@ -111,6 +111,34 @@ tape( 'the function throws an error if provided a fourth argument which is not a
 	}
 });
 
+tape( 'the function returns an invalid index (-1) when M is zero', function test( t ) {
+	var data;
+	var out;
+	var A;
+
+	data = ROW_MAJOR_DATA;
+
+	A = new Float64Array( data.A );
+	out = iladlr( data.order, 0, data.N, A, data.LDA );
+
+	t.deepEqual( out, -1, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns an invalid index (-1) when N is zero', function test( t ) {
+	var data;
+	var out;
+	var A;
+
+	data = ROW_MAJOR_DATA;
+
+	A = new Float64Array( data.A );
+	out = iladlr( data.order, data.M, 0, A, data.LDA );
+
+	t.deepEqual( out, -1, 'returns expected value' );
+	t.end();
+});
+
 tape( 'the function returns the expected zero based index of the last non zero row of a matrix (row-major)', function test( t ) {
 	var data;
 	var out;