test: add test for norm = 0

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---

Author: aayush0325

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

@@ -543,3 +543,69 @@ tape( 'the function returns expected values for job = B with complex input (colu
 	t.deepEqual( scale, expectedScale, 'returns expected value' );
 	t.end();
 });
+
+tape( 'the function returns expected values for job = S with zero norm (row-major)', function test( t ) {
+	var expectedScale;
+	var expectedOut;
+	var expectedA;
+	var scale;
+	var info;
+	var out;
+	var A;
+
+	A = new Float64Array([
+		1.0, 0.0, 4.0,
+		2.0, 0.0, 5.0,
+		3.0, 0.0, 6.0
+	]);
+	out = new Float64Array( 2 );
+	scale = new Float64Array( 3 );
+
+	expectedOut = new Float64Array( [ 0.0, 2.0 ] );
+	expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+	expectedA = new Float64Array([
+		1.0, 0.0, 4.0,
+		2.0, 0.0, 5.0,
+		3.0, 0.0, 6.0
+	]);
+
+	info = dgebal( 'row-major', 'S', 3, A, 3, out, scale );
+	t.strictEqual( info, 0, 'returns expected value' );
+	t.deepEqual( out, expectedOut, 'returns expected value' );
+	t.deepEqual( A, expectedA, 'returns expected value' );
+	t.deepEqual( scale, expectedScale, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns expected values for job = S with zero norm (column-major)', function test( t ) {
+	var expectedScale;
+	var expectedOut;
+	var expectedA;
+	var scale;
+	var info;
+	var out;
+	var A;
+
+	A = new Float64Array([
+		1.0, 2.0, 3.0,
+		0.0, 0.0, 0.0,
+		4.0, 5.0, 6.0
+	]);
+	out = new Float64Array( 2 );
+	scale = new Float64Array( 3 );
+
+	expectedOut = new Float64Array( [ 0.0, 2.0 ] );
+	expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+	expectedA = new Float64Array([
+		1.0, 2.0, 3.0,
+		0.0, 0.0, 0.0,
+		4.0, 5.0, 6.0
+	]);
+
+	info = dgebal( 'column-major', 'S', 3, A, 3, out, scale );
+	t.strictEqual( info, 0, 'returns expected value' );
+	t.deepEqual( out, expectedOut, 'returns expected value' );
+	t.deepEqual( A, expectedA, 'returns expected value' );
+	t.deepEqual( scale, expectedScale, 'returns expected value' );
+	t.end();
+});