Fix eko/qnt/hq and add unit test

Author: felixhekhorn

tests/eko/test_quantities.py

@@ -0,0 +1,47 @@
+from math import nan
+
+import pytest
+
+from eko.quantities import heavy_quarks as hq
+
+
+def test_HeavyQuarks():
+    with pytest.raises(ValueError):
+        hq.MatchingRatios([1, 2, 3, 4])
+    l = hq.MatchingRatios([0.5, 2.0, 3.0])
+    assert len(l) == 3
+    assert l.c == 0.5
+    assert l.b == 2.0
+    assert l.t == 3.0
+    l.c = 0.7
+    assert len(l) == 3
+    assert l.c == 0.7
+    assert l.b == 2.0
+    assert l.t == 3.0
+    l.b = 2.7
+    assert len(l) == 3
+    assert l.c == 0.7
+    assert l.b == 2.7
+    assert l.t == 3.0
+    l.t = 3.7
+    assert len(l) == 3
+    assert l.c == 0.7
+    assert l.b == 2.7
+    assert l.t == 3.7
+
+
+def test_HeavyInfo():
+    i = hq.HeavyInfo(
+        num_flavs_init=4,
+        num_flavs_max_pdf=6,
+        intrinsic_flavors=[4, 5],
+        masses=hq.HeavyQuarkMasses(
+            [
+                hq.QuarkMassRef(2.0, nan),
+                hq.QuarkMassRef(5.0, nan),
+                hq.QuarkMassRef(100.0, nan),
+            ]
+        ),
+        masses_scheme=hq.QuarkMassScheme.POLE,
+        matching_ratios=hq.MatchingRatios([1.5, 2.0, 3.0]),
+    )