fix: [#1557] Adds missing setter for the HTMLMediaElement.srcObject p…

…roperty (#1560)

* fix: [#1557] TypeError: Cannot set property srcObject had only a getter

* chore: [#1557] Adds validation for if object is of type MediaStream

---------

Co-authored-by: David Ortner <david@ortner.se>

packages/happy-dom/src/nodes/html-media-element/HTMLMediaElement.ts

@@ -403,6 +403,20 @@ export default class HTMLMediaElement extends HTMLElement {
 		return this[PropertySymbol.srcObject];
 	}
 
+	/**
+	 * Sets src object.
+	 *
+	 * @param srcObject SrcObject.
+	 */
+	public set srcObject(srcObject: MediaStream | null) {
+		if (srcObject !== null && !(srcObject instanceof MediaStream)) {
+			throw new this[PropertySymbol.window].TypeError(
+				`Failed to set the 'srcObject' property on 'HTMLMediaElement': The provided value is not of type 'MediaStream'.`
+			);
+		}
+		this[PropertySymbol.srcObject] = srcObject;
+	}
+
 	/**
 	 * Returns text track list.
 	 *

packages/happy-dom/test/nodes/html-media-element/HTMLMediaElement.test.ts

@@ -293,6 +293,30 @@ describe('HTMLMediaElement', () => {
 		});
 	});
 
+	describe('set srcObject()', () => {
+		it('Sets a MediaStream object', () => {
+			const srcObject = new window.MediaStream();
+			element.srcObject = srcObject;
+			expect(element.srcObject).toBe(srcObject);
+		});
+
+		it('Allows to be set to null', () => {
+			element.srcObject = new window.MediaStream();
+			element.srcObject = null;
+			expect(element.srcObject).toBeNull();
+		});
+
+		it('Throws an error if the value is not a MediaStream object', () => {
+			expect(() => {
+				element.srcObject = <MediaStream>{};
+			}).toThrowError(
+				new TypeError(
+					`Failed to set the 'srcObject' property on 'HTMLMediaElement': The provided value is not of type 'MediaStream'.`
+				)
+			);
+		});
+	});
+
 	describe('get textTracks()', () => {
 		it('Returns an empty TextTrackList object by default.', () => {
 			expect(element.textTracks.length).toBe(0);