visibility_set¶
Tests for the functions in WODEN/src/visibility_set.c. These functions handle
a visibility_set_t struct, which holds the output visibilities. Functions
here include mallocing, filling, and freeing attributes.
test_fill_timefreq_visibility_set.c¶
This calls visibility_set::fill_timefreq_visibility_set, which uses a
populated woden_settings_t struct to fill in the following attributes in
a visibility_set_t struct:
visibility_set->allsteps_sha0s
visibility_set->allsteps_cha0s
visibility_set->allsteps_lsts
visibility_set->allsteps_wavelengths
Where sha0 and cha0 are sine and cosine of the hour angle of the phase
centre, respectively. This test runs with three time steps with LSTs of
\(0\), \(\pi/6\), \(\pi/4\), so that allsteps_sha0s and
allsteps_cha0s can be analytically predicted. allsteps_wavelengths are
calculated using input frequencies, which are set to \(c/2\), \(3c/4\),
and \(c\), meaning the expected output wavelengths should be \(2\), \(4/3\),
and \(1\). The third let’s us test the accuracy of the wavelength calculation.
All angles and LSTs are stored at 64bit precision, so both FLOAT and DOUBLE
code versions are tested to within an absolute tolerance of 1e-15. The precision
of allsteps_wavelengths is set by the user, and is tested to within 1e-7
for FLOAT and 1e-15 for DOUBLE.
test_malloc_and_free.c¶
Very basic test of visibility_set::setup_visibility_set,
visibility_set::free_visi_set_inputs, and visibility_set::free_visi_set_outputs,
which are functions that either malloc or free specific attributes in a
visibility_set_t struct. Tests by calling each function and checking that
the following attributes are NOT a NULL if a malloc was called, and the correct
attributes are NULL if free was called.
test_write_visi_set_binary.c¶
Tests visibility_set::write_visi_set_binary, which writes out the contents
of a visibility_set_t struct to a binary file. Tests by filling a
visibility_set_t struct with some simple non-repeating values, and then
uses write_visi_set_binary. Then reads that binary file in and checks the
contents matched what was in the visibility_set_t struct.
test_write_visi_set_text.c¶
Tests visibility_set::write_visi_set_text, which writes out a subset of
the contents of a visibility_set_t struct to a text file. This test
works similarly to test_write_visi_set_binary.c, by calling
write_visi_set_text with a known set of inputs, and checking the text file
it writes out contains the known inputs.