test: achieve 100% test coverage for blas/ext/base/dnansumors

PR-URL: #3087
Closes: #3075

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: gururaj1512

lib/node_modules/@stdlib/blas/ext/base/dnansumors/test/test.ndarray.js

@@ -74,6 +74,10 @@ tape( 'the function calculates the sum of strided array elements (ignoring NaN v
 	v = dnansumors( x.length, x, 1, 0 );
 	t.strictEqual( v, 0.0, 'returns expected value' );
 
+	x = new Float64Array( [ NaN, -4.0 ] );
+	v = dnansumors( x.length, x, 0, 0 );
+	t.strictEqual( v, 0.0, 'returns expected value' );
+
 	t.end();
 });
 
@@ -162,6 +166,18 @@ tape( 'if provided a `stride` parameter equal to `0`, the function returns the s
 	t.end();
 });
 
+tape( 'if provided a `stride` and `offset` parameter equal to `0` and the first element is NaN, the function returns `0`', function test( t ) {
+	var x;
+	var v;
+
+	x = new Float64Array( [ NaN, -2.0, -4.0, 5.0, 3.0 ] );
+
+	v = dnansumors( x.length, x, 0, 0 );
+	t.strictEqual( v, 0.0, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function supports an `offset` parameter', function test( t ) {
 	var x;
 	var v;