fix: allow 0d output arrays and address failing tests

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---

Author: kgryte

lib/node_modules/@stdlib/ndarray/broadcast-scalar/lib/main.js

@@ -22,6 +22,7 @@
 
 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
 var isComplexDataType = require( '@stdlib/array/base/assert/is-complex-floating-point-data-type' );
+var isEmptyCollection = require( '@stdlib/assert/is-empty-collection' );
 var isNonNegativeIntegerArray = require( '@stdlib/assert/is-nonnegative-integer-array' ).primitives;
 var isAccessorArray = require( '@stdlib/array/base/assert/is-accessor-array' );
 var isPlainObject = require( '@stdlib/assert/is-plain-object' );
@@ -95,7 +96,7 @@ function broadcastScalar( value, shape, options ) {
 		'order': ORDER,
 		'readonly': false
 	};
-	if ( !isNonNegativeIntegerArray( shape ) ) {
+	if ( !isNonNegativeIntegerArray( shape ) && !isEmptyCollection( shape ) ) {
 		throw new TypeError( format( 'invalid argument. First argument must be an array of nonnegative integers. Value: `%s`.', shape ) );
 	}
 	if ( arguments.length > 2 ) {

lib/node_modules/@stdlib/ndarray/broadcast-scalar/test/test.js

@@ -69,7 +69,7 @@ tape( 'the function throws an error if provided a second argument which is not a
 		false,
 		null,
 		void 0,
-		[],
+		[ 'foo' ],
 		function noop() {}
 	];
 
@@ -98,7 +98,7 @@ tape( 'the function throws an error if provided a second argument which is not a
 		false,
 		null,
 		void 0,
-		[],
+		[ 'foo' ],
 		function noop() {}
 	];
 
@@ -311,7 +311,7 @@ tape( 'the function broadcasts a scalar value to an ndarray of a specified shape
 	t.strictEqual( getOrder( arr ), 'row-major', 'returns expected value' );
 	t.strictEqual( numel( arr ), 4, 'returns expected value' );
 
-	expected = new Uint8Array( [ 0, 0, 0, 0 ] );
+	expected = new Uint8Array( [ 0 ] );
 
 	arr = broadcastScalar( false, [ 2, 2 ] );
 
@@ -663,7 +663,7 @@ tape( 'the function broadcasts a scalar value to an ndarray of a specified shape
 	t.end();
 });
 
-tape( 'the function broadcasts a scalar value to an ndarray of a specified shape (empty)', function test( t ) {
+tape( 'the function broadcasts a scalar value to an ndarray of a specified shape (0d)', function test( t ) {
 	var expected;
 	var arr;
 
@@ -676,6 +676,24 @@ tape( 'the function broadcasts a scalar value to an ndarray of a specified shape
 	t.strictEqual( instanceOf( getData( arr ), Float64Array ), true, 'returns expected value' );
 	t.deepEqual( getData( arr ), expected, 'returns expected value' );
 	t.strictEqual( getOrder( arr ), 'row-major', 'returns expected value' );
+	t.strictEqual( numel( arr ), 1, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function broadcasts a scalar value to an ndarray of a specified shape (empty)', function test( t ) {
+	var expected;
+	var arr;
+
+	expected = new Float64Array( [ 1.0 ] );
+	arr = broadcastScalar( 1.0, [ 2, 0, 2 ] );
+
+	t.strictEqual( instanceOf( arr, ndarray ), true, 'returns expected value' );
+	t.strictEqual( String( getDType( arr ) ), 'float64', 'returns expected value' );
+	t.deepEqual( getShape( arr ), [ 2, 0, 2 ], 'returns expected value' );
+	t.strictEqual( instanceOf( getData( arr ), Float64Array ), true, 'returns expected value' );
+	t.deepEqual( getData( arr ), expected, 'returns expected value' );
+	t.strictEqual( getOrder( arr ), 'row-major', 'returns expected value' );
 	t.strictEqual( numel( arr ), 0, 'returns expected value' );
 
 	t.end();