get fslr correction to 100% coverage

Author: kandersolar

pvlib/tests/test_spectrum.py

@@ -216,6 +216,23 @@ def test_first_solar_spectral_correction_ambiguous():
         spectrum.first_solar_spectral_correction(1, 1)
 
 
+def test_first_solar_spectral_correction_ambiguous_both():
+    # use the cdte coeffs
+    coeffs = (0.87102, -0.040543, -0.00929202, 0.10052, 0.073062, -0.0034187)
+    with pytest.raises(TypeError):
+        spectrum.first_solar_spectral_correction(1, 1, 'cdte',
+                                                 coefficients=coeffs)
+
+def test_first_solar_spectral_correction_large_airmass():
+    # test that airmass > 10 is treated same as airmass==10
+    m_eq10 = spectrum.first_solar_spectral_correction(1, 10, 'monosi')
+    m_gt10 = spectrum.first_solar_spectral_correction(1, 15, 'monosi')
+    assert_allclose(m_eq10, m_gt10)
+
+def test_first_solar_spectral_correction_low_airmass():
+    with pytest.warns(UserWarning, match='Exceptionally low air mass'):
+        _ = spectrum.first_solar_spectral_correction(1, 0.1, 'monosi')
+
 def test_first_solar_spectral_correction_range():
     with pytest.warns(UserWarning, match='Exceptionally high pw values'):
         out = spectrum.first_solar_spectral_correction(np.array([.1, 3, 10]),