| This is a testharness.js-based test. |
| PASS HTMLElement constructor must throw a TypeError when NewTarget is equal to itself |
| PASS HTMLElement constructor must throw a TypeError when NewTarget is equal to itself via a Proxy object |
| PASS HTMLElement constructor must throw TypeError when it has not been defined by customElements.define |
| PASS Custom element constructor must throw TypeError when it does not extend HTMLElement |
| PASS Custom element constructor must throw TypeError when it does not extend the proper element interface |
| PASS HTMLElement constructor must infer the tag name from the element interface |
| PASS HTMLElement constructor must allow subclassing a custom element |
| PASS HTMLElement constructor must allow subclassing an user-defined subclass of HTMLElement |
| FAIL HTMLElement constructor must only get .prototype once, calling proxy constructor directly assert_equals: Should have gotten .prototype once expected 1 but got 2 |
| FAIL HTMLElement constructor must only get .prototype once, calling proxy constructor via Reflect assert_equals: Should have gotten .prototype once expected 1 but got 2 |
| FAIL HTMLElement constructor must only get .prototype once, calling proxy constructor via Reflect with no inheritance assert_equals: Should have gotten .prototype once expected 1 but got 2 |
| FAIL HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling proxy constructor directly assert_equals: Should never have gotten .prototype expected 0 but got 1 |
| FAIL HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling via Reflect assert_equals: Should never have gotten .prototype expected 0 but got 1 |
| FAIL HTMLElement constructor must not get .prototype until it finishes its registration sanity checks, calling proxy constructor directly assert_equals: Should never have gotten .prototype expected 0 but got 1 |
| FAIL HTMLElement constructor must not get .prototype until it finishes its registration sanity checks, calling via Reflect assert_equals: Should never have gotten .prototype expected 0 but got 1 |
| Harness: the test ran to completion. |
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