This is a testharness.js-based test.
[FAIL] CJK Unified Ideographs Extension G (U+30000) justifies like U+4E00
  assert_equals: Extension G (U+30000) must match U+4E00 expansion behavior expected true but got false
[FAIL] CJK Unified Ideographs Extension H (U+31350) justifies like U+4E00
  assert_equals: Extension H (U+31350) must match U+4E00 expansion behavior expected true but got false
Harness: the test ran to completion.