utf8 db round trip tests

gistfile1.txt

with 'use utf8;' pragma:

not ok 3 - lightly mixed utf8 string [läbel] round trips correctly

#   Failed test 'lightly mixed utf8 string [läbel] round trips correctly'
#   at t/web/dev-7476.t line 139.
#          got: 'l�bel'
#     expected: 'läbel'
# $VAR1 = {
#           'got' => "l\x{e4}bel",
#           'expected' => 'läbel'
#         };
ok 4 - heavily mixed utf8 string [siʔaɫ] round trips correctly # TODO database round trip for heavily mixed utf8 data
ok 5 - utf8 string [देवनागरी] round trips correctly # TODO database round trip for heavily mixed utf8 data

without 'use utf8;' pragma:

ok 3 - lightly mixed utf8 string [l�bel] round trips correctly
not ok 4 - heavily mixed utf8 string [siʔaɫ] round trips correctly # TODO database round trip for heavily mixed utf8 data

#   Failed (TODO) test 'heavily mixed utf8 string [siʔaɫ] round trips correctly'
#   at t/web/dev-7476.t line 152.
#          got: 'siÊaÉ«'
#     expected: 'siʔaɫ'
# $VAR1 = {
#           'got' => "si\x{ca}\x{94}a\x{c9}\x{ab}",
#           'expected' => "si\x{294}a\x{26b}"
#         };
not ok 5 - utf8 string [देवनागरी] round trips correctly # TODO database round trip for heavily mixed utf8 data

#   Failed (TODO) test 'utf8 string [देवनागरी] round trips correctly'
#   at t/web/dev-7476.t line 161.
#          got: 'दà¥à¤µà¤¨à¤¾à¤à¤°à¥'
#     expected: 'देवनागरी'
# $VAR1 = {
#           'got' => "\x{e0}\x{a4}\x{a6}\x{e0}\x{a5}\x{87}\x{e0}\x{a4}\x{b5}\x{e0}\x{a4}\x{a8}\x{e0}\x{a4}\x{be}\x{e0}\x{a4}\x{97}\x{e0}\x{a4}\x{b0}\x{e0}\x{a5}\x{80}",
#           'expected' => "\x{926}\x{947}\x{935}\x{928}\x{93e}\x{917}\x{930}\x{940}"
#         };