Renders flextable objects to PNG with
flextable::save_as_image() and compares against a reference
snapshot using expect_snapshot_doc().
When x is a list of flextable objects, individual renderings are
assembled into a single composite image via images_to_miniature().
By default each table occupies its own row; use ncol to arrange
several tables per row. The snapshot is always a single file
named <name>.png, stored in testthat's _snaps directory.
If a table fails to render, its slot is replaced by a blank white rectangle (200 x 50 px), making the failure visible in the diff.
On the first run the reference snapshot is created and the test is reported as a new snapshot. Subsequent runs compare the current rendering against the stored reference.
expect_snapshot_flextables(x, name, res = 200, ncol = NULL, tolerance = 0.001)The result of expect_snapshot_doc().
a flextable object or a list containing flextable objects.
a unique string used as the snapshot file name
(<name>.png). Must be unique across the test file.
resolution in DPI, default 200.
number of images per row in the composite when x
is a list (default NULL, one image per row).
ratio of different pixels allowed, default 0.001.