| PASS | Constructing a CSSLab with percent for the lightness works as intended. | |
| PASS | CSSLab.l can be updated with a percent. | |
| PASS | Constructing a CSSLab with number for the lightness works as intended. | |
| PASS | CSSLab.l can be updated with a number. | |
| PASS | Constructing a CSSLab with css pixels for lightness throws a SyntaxError. | |
| PASS | Constructing a CSSLab with degrees for lightness throws a SyntaxError. | |
| PASS | CSSLab can be constructed from three numbers and will get an alpha of 100%. | |
| PASS | CSSLab can be constructed from four numbers. | |
| PASS | Constructing a CSSLab with CSS.number for l or alpha throws a SyntaxError | |
| PASS | Updating a CSSLab with CSS.number for l throws a SyntaxError | |
| PASS | CSSLab.l can be updated to a number. | |
| PASS | CSSLab.l can be updated with a CSS percent. | |
| PASS | Updating a CSSLab with CSS.number for alpha throws a SyntaxError | |
| PASS | CSSLab.alpha can be updated to a number. | |
| PASS | CSSLab.alpha can be updated with a CSS percent. | |