DeltaTest improvements (#876)

* DeltaTest improvements

- Added .expect_contains(), .expect_raw_contains(), and
  .expect_contains_once() member functions to DeltaTestOutput.
  These functions also output some helpful debug info when the
  assert fails.
- Separated .with_config_and_input() into .with_config() and (the
  tweaked) .with_input().
- Made .with_config() create a DeltaTest object (like .with() does).
- Renamed .with() as .with_args().
- Moved .explain_ansi() from DeltaTestOutput to DeltaTest, which must
  now be called prior to .with_input() since the latter stashes off both
  the raw_output & the processed output in the object.
- Changed .expect() and .expect_skip() to return Self so that they can
  continue a chain of multiple expect calls (e.g. a series of partial
  matches with different skip values).
- The processed output text can be accessed via `test_obj.output` (see
  also `test_obj.raw_output`).
- Renamed .expect_skip() to .expect_after_skip().
- Changed .expect() to start at the first line.
- Added .expect_after_header() that works like the old .expect().
- Renamed lines_match() to assert_lines_match() and made it match all
  lines (no skip number).
- Added assert_lines_match_after_skip() to work like the old
  lines_match() function, but with the .expect_after_skip() arg order.
- Converted some old-style tests into DeltaTest style tests.
- Renamed set_cfg as set_config

0 files changed, 0 insertions, 0 deletions