added test functions for FalsePositivePop class.

tests/test_FalsePositives/test_false_positive_pop.py

@@ -0,0 +1,59 @@
+import pytest
+from astropy.cosmology import FlatLambdaCDM
+import slsim.Sources as sources
+import slsim.Deflectors as deflectors
+import slsim.Pipelines as pipelines
+from slsim.FalsePositives.false_positive_pop import FalsePositivePop
+from astropy.units import Quantity
+
+sky_area = Quantity(value=0.01, unit="deg2")
+cosmo = FlatLambdaCDM(H0=70, Om0=0.3)
+galaxy_simulation_pipeline = pipelines.SkyPyPipeline(
+    skypy_config=None,
+    sky_area=sky_area,
+    filters=None,
+)
+kwargs_deflector_cut = {"band": "g", "band_max": 28, "z_min": 0.01, "z_max": 2.5}
+kwargs_source_cut = {"band": "g", "band_max": 28, "z_min": 0.1, "z_max": 5.0}
+red_galaxy_list = galaxy_simulation_pipeline.red_galaxies
+blue_galaxy_list = galaxy_simulation_pipeline.blue_galaxies
+lens_galaxies = deflectors.EllipticalLensGalaxies(
+    galaxy_list=red_galaxy_list,
+    kwargs_cut=kwargs_deflector_cut,
+    kwargs_mass2light=0.1,
+    cosmo=cosmo,
+    sky_area=sky_area,
+)
+source_galaxies = sources.Galaxies(
+    galaxy_list=blue_galaxy_list,
+    kwargs_cut=kwargs_source_cut,
+    cosmo=cosmo,
+    sky_area=sky_area,
+    catalog_type="skypy",
+)
+
+
+def test_draw_false_positive_single():
+    fp_pop1 = FalsePositivePop(
+        elliptical_galaxy_population=lens_galaxies,
+        blue_galaxy_population=source_galaxies,
+        cosmo=cosmo,
+        source_number_choice=[1],
+    )
+    draw_fp1 = fp_pop1.draw_false_positive()
+    assert isinstance(draw_fp1, object)
+
+
+def test_draw_false_positive_multiple():
+    fp_pop2 = FalsePositivePop(
+        elliptical_galaxy_population=lens_galaxies,
+        blue_galaxy_population=source_galaxies,
+        cosmo=cosmo,
+        source_number_choice=[2],
+    )
+    draw_fp2 = fp_pop2.draw_false_positive(number=2)
+    assert isinstance(draw_fp2, list)
+
+
+if __name__ == "__main__":
+    pytest.main()