test: add test case

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---

Author: headlessNode

lib/node_modules/@stdlib/ndarray/fill-slice/test/test.js

@@ -189,6 +189,35 @@ tape( 'the function throws an error if provided a `strict` option which is not a
 	}
 });
 
+tape( 'the function throws an error if provided an invalid slice argument', function test( t ) {
+	var values;
+	var x;
+	var s;
+	var i;
+
+	values = [
+		'5',
+		NaN,
+		[],
+		function noop() {}
+	];
+	x = scalar2ndarray( 0.0, {
+		'dtype': 'float64'
+	});
+	s = null;
+
+	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() {
+			fillSlice( x, 10.0, s, value );
+		};
+	}
+});
+
 tape( 'the function fills an input ndarray slice with a specified value (row-major, contiguous)', function test( t ) {
 	var expected;
 	var ord;