tst_tostring: support computed expected values

We need an owning container to keep the data alive when the _data
function computes the expected value instead of passing it as a
literal string, so replace the QByteArrayView we used so far with a
const QByteArray.

If a test failed, print the tail ends of the failing strings. This
is useful when toString() implementations printing the operands of
the failed toString()-under-test result comparison decide to
truncate the output. It works around the fact that we both test
toString() and use toString() to report any failure.

As a drive-by, add a missing blank line between function definitions.

Amends a2551c45d496c23045eb8451e080e75b2f8b42c1.

Pick-to: 6.6
Change-Id: I0b217aeb1a6d475df8e8b9fb821046f1cceb1a3e
Reviewed-by: Jason McDonald <macadder1@gmail.com>

0 files changed, 0 insertions, 0 deletions