Fix reoccurring overflow errors (pyccel#2037)

The `test_sum_matching_types` often fails due to overflow errors while
calling `np.isclose`. This PR decreases the size of the complex values
being tested to try and stop these errors occurring.

Author: EmilyBourne

tests/epyccel/recognised_functions/test_numpy_types.py

@@ -111,25 +111,13 @@ def add_numpy_to_numpy_type(np_s_l : 'T', np_s_r : 'D'):
     assert pyccel_result == python_result
     assert isinstance(pyccel_result, type(python_result))
 
-    pyccel_result = epyccel_func(integer64, fl32)
-    python_result = add_numpy_to_numpy_type(integer64, fl32)
-    assert pyccel_result == python_result
-    assert isinstance(pyccel_result, type(python_result))
-
-    pyccel_result = epyccel_func(integer64, fl64)
-    python_result = add_numpy_to_numpy_type(integer64, fl64)
-    assert pyccel_result == python_result
-    assert isinstance(pyccel_result, type(python_result))
-
-    pyccel_result = epyccel_func(fl64, complex64)
-    python_result = add_numpy_to_numpy_type(fl64, complex64)
-    assert pyccel_result == python_result
-    assert isinstance(pyccel_result, type(python_result))
-
-    pyccel_result = epyccel_func(complex128, fl64)
-    python_result = add_numpy_to_numpy_type(complex128, fl64)
-    assert pyccel_result == python_result
-    assert isinstance(pyccel_result, type(python_result))
+    for type1, type2 in ((integer64, fl32), (integer64, fl64), (fl64, complex64), (complex128, fl64)):
+        pyccel_result = epyccel_func(type1, type2)
+        python_result = add_numpy_to_numpy_type(type1, type2)
+        rtol = RTOL32 if isinstance(python_result, (np.float64, np.complex128)) else RTOL
+        atol = ATOL32 if isinstance(python_result, (np.float64, np.complex128)) else ATOL
+        assert np.isclose(pyccel_result, python_result, rtol=rtol, atol=atol)
+        assert isinstance(pyccel_result, type(python_result))
 
 @pytest.mark.skipif(numpy_basic_types_deprecated, reason="Can't import bool from numpy")
 def test_numpy_bool_scalar(language):

tests/epyccel/test_builtins.py

@@ -345,7 +345,7 @@ def f(x : 'T', y : 'T'):
 
     int_args = [randint(min_int//2, max_int//2) for _ in range(2)]
     float_args = [uniform(min_float/2, max_float/2) for _ in range(2)]
-    complex_args = [uniform(min_float/2, max_float/2) + 1j*uniform(min_float/2, max_float/2)
+    complex_args = [uniform(min_float/4, max_float/4) + 1j*uniform(min_float/4, max_float/4)
                     for _ in range(2)]
 
     assert epyc_f(*int_args) == f(*int_args)