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REF: Parametrize test #28515

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Sep 19, 2019
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REF: Parametrize test #28515

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43 changes: 22 additions & 21 deletions pandas/tests/internals/test_internals.py
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Original file line number Diff line number Diff line change
Expand Up @@ -528,32 +528,33 @@ def test_as_array_datetime_tz(self):
assert mgr.get("g").dtype == "datetime64[ns, CET]"
assert mgr.as_array().dtype == "object"

def test_astype(self):
@pytest.mark.parametrize("t", ["float16", "float32", "float64", "int32", "int64"])
def test_astype(self, t):
# coerce all
mgr = create_mgr("c: f4; d: f2; e: f8")
for t in ["float16", "float32", "float64", "int32", "int64"]:
t = np.dtype(t)
tmgr = mgr.astype(t)
assert tmgr.get("c").dtype.type == t
assert tmgr.get("d").dtype.type == t
assert tmgr.get("e").dtype.type == t

t = np.dtype(t)
tmgr = mgr.astype(t)
assert tmgr.get("c").dtype.type == t
assert tmgr.get("d").dtype.type == t
assert tmgr.get("e").dtype.type == t

# mixed
mgr = create_mgr("a,b: object; c: bool; d: datetime; e: f4; f: f2; g: f8")
for t in ["float16", "float32", "float64", "int32", "int64"]:
t = np.dtype(t)
tmgr = mgr.astype(t, errors="ignore")
assert tmgr.get("c").dtype.type == t
assert tmgr.get("e").dtype.type == t
assert tmgr.get("f").dtype.type == t
assert tmgr.get("g").dtype.type == t

assert tmgr.get("a").dtype.type == np.object_
assert tmgr.get("b").dtype.type == np.object_
if t != np.int64:
assert tmgr.get("d").dtype.type == np.datetime64
else:
assert tmgr.get("d").dtype.type == t

t = np.dtype(t)
tmgr = mgr.astype(t, errors="ignore")
assert tmgr.get("c").dtype.type == t
assert tmgr.get("e").dtype.type == t
assert tmgr.get("f").dtype.type == t
assert tmgr.get("g").dtype.type == t

assert tmgr.get("a").dtype.type == np.object_
assert tmgr.get("b").dtype.type == np.object_
if t != np.int64:
assert tmgr.get("d").dtype.type == np.datetime64
else:
assert tmgr.get("d").dtype.type == t

def test_convert(self):
def _compare(old_mgr, new_mgr):
Expand Down