Update test_core.py

Author: Daniel15568

tests/test_core.py

@@ -1 +1,10 @@
+from percentify import percent
 
+def test_percent_normal():
+    assert percent(50, 200) == 25.0
+
+def test_percent_fraction():
+    assert percent(1, 3) == 33.33
+
+def test_percent_zero_division():
+    assert percent(5, 0) == 0.0