autowisp.tests.test_source_finder module

Class Inheritance Diagram

Exercise the quantile-based brightness-threshold path in SourceFinder.

When brightness_threshold is left unset, SourceFinder derives it from an image quantile (brightness_quantile_scale * numpy.quantile(...)), producing a numpy.float64. Under numpy 2, repr(numpy.float64(x)) is 'np.float64(x)' – which fistar rejects with “invalid command line argument” – so start_fistar coerces to a plain float before repr.

The find_stars integration test only ever uses a fixed (Python-float) threshold from test.cfg, so this quantile path – where the numpy.float64 originates and reaches the command line – was never exercised. This drives it end to end with the real fistar (an astrowisp dependency) and checks that the extraction actually succeeds.

class autowisp.tests.test_source_finder.TestExtremeSourceCounts(methodName='runTest')

Bases: TestCase

Frames with one source or none must not crash the extractor.

numpy.genfromtxt is what makes these two special: a single extracted source comes back as a 0-d array (indexing it with the finite-value mask raised IndexError), and no sources at all come back as a 1-d array whose dtype has no field names (sort(order= "flux") then raised ValueError: unknown field name).

test_no_sources_raises_naming_the_frame()

A starless frame raises NoSourcesFoundError naming the file.

The threshold is set far above anything in the (source-free) image so fistar reliably extracts nothing.

test_single_source_extraction_succeeds()

One source must come back as a normal 1-element source list.

class autowisp.tests.test_source_finder.TestQuantileBrightnessThreshold(methodName='runTest')

Bases: TestCase

The image-quantile threshold must drive a successful fistar run.

test_quantile_threshold_extraction_succeeds()

Derive the threshold from the image quantile and run fistar for real.

With brightness_threshold unset, SourceFinder computes it as a numpy.float64 from the image and hands it to fistar. A malformed value (the pre-fix numpy repr) makes fistar exit with “invalid command line argument” and extract nothing, so a non-empty result confirms the threshold reached the CLI in a parseable form.

autowisp.tests.test_source_finder._make_test_frame(fits_path, source_positions=None)

Write a 3-HDU FITS (image, placeholder, saturation mask) with 5 sources.

Three HDUs because SourceFinder reads the image from HDU 0 and the saturation mask from HDU 2. The five bright Gaussians sit well above the 0.999 image quantile so fistar has clear sources to extract.

Parameters:

• fits_path (str) – Where to write the frame.

• source_positions (list or None) – (x, y) of each source to inject; the default five are used if not given. Pass an empty list for a starless frame.