| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/js-test.js"></script> |
| <script> |
| description("Tests that Array.concat() behaves correctly with an observable array returned by adoptedStyleSheets."); |
| |
| let a = new CSSStyleSheet; |
| let b = new CSSStyleSheet; |
| let c = new CSSStyleSheet; |
| document.adoptedStyleSheets.push(b); |
| document.adoptedStyleSheets.push(c); |
| shouldBe("document.adoptedStyleSheets.length", "2"); |
| |
| let newArray = [a].concat(document.adoptedStyleSheets); |
| shouldBe("newArray.length", "3"); |
| shouldBe("document.adoptedStyleSheets.length", "2"); |
| shouldBe("newArray[0]", "a"); |
| shouldBe("newArray[1]", "b"); |
| shouldBe("newArray[2]", "c"); |
| </script> |
| </body> |
| </html> |
