test: add tests for 0d input arrays

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---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/index-of/test/test.assign.js

@@ -460,6 +460,35 @@ tape( 'the function throws an error if provided a first argument which is not an
 	}
 });
 
+tape( 'the function throws an error if provided a first argument which is a zero-dimensional ndarray', function test( t ) {
+	var values;
+	var opts;
+	var i;
+	var y;
+
+	opts = {
+		'dtype': 'generic'
+	};
+
+	y = zeros( [], opts );
+
+	values = [
+		scalar2ndarray( 10.0 ),
+		scalar2ndarray( -3.0 ),
+		scalar2ndarray( 0.0 )
+	];
+	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() {
+			indexOf( value, scalar2ndarray( 2.0 ), scalar2ndarray( 0, opts ), y, {} ); // eslint-disable-line max-len
+		};
+	}
+});
+
 tape( 'the function throws an error if provided a third argument which is not an ndarray-like object, an integer, or an object', function test( t ) {
 	var values;
 	var i;