| This is a testharness.js-based test. |
| PASS no entryTypes throws a TypeError |
| PASS entryTypes must be a sequence or throw a TypeError |
| FAIL Empty sequence entryTypes is a no-op Failed to execute 'observe' on 'PerformanceObserver': A Performance Observer MUST have at least one valid entryType in its entryTypes attribute. |
| FAIL Unknown entryTypes are no-op Failed to execute 'observe' on 'PerformanceObserver': A Performance Observer MUST have at least one valid entryType in its entryTypes attribute. |
| PASS Filter unsupported entryType entryType names within the entryTypes sequence |
| PASS Check observer callback parameter and this values |
| PASS replace observer if already present |
| Harness: the test ran to completion. |
| |
