
PASS "toNativeLineEndings" should not be supported 
FAIL "FileError" should not be supported assert_false: expected false got true
PASS "FileException" should not be supported 
PASS "FileHandle" should not be supported 
PASS "FileRequest" should not be supported 
PASS "MutableFile" should not be supported 
PASS Blob should not support slice prefixed 
PASS BlobBuilder should not be supported. 
PASS createFor method should not be supported 
PASS Blob.close() should not be supported 
PASS File's lastModifiedDate should not be supported 
PASS Service worker test setup 
FAIL "FileReaderSync" should not be supported in service workers assert_false: expected false got true