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Automatic PR for c0469b52-5fcc-4a9e-9b7b-a574ffbe8de5 #99

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86 changes: 1 addition & 85 deletions pandas/tests/copy_view/test_functions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@

from pandas import (
DataFrame,
Index,
Series,
concat,
merge,
Expand Down Expand Up @@ -310,87 +309,4 @@ def test_merge_copy_keyword(using_copy_on_write, copy):
assert np.shares_memory(get_array(df2, "b"), get_array(result, "b"))
else:
assert not np.shares_memory(get_array(df, "a"), get_array(result, "a"))
assert not np.shares_memory(get_array(df2, "b"), get_array(result, "b"))


def test_join_on_key(using_copy_on_write):
df_index = Index(["a", "b", "c"], name="key")

df1 = DataFrame({"a": [1, 2, 3]}, index=df_index.copy(deep=True))
df2 = DataFrame({"b": [4, 5, 6]}, index=df_index.copy(deep=True))

df1_orig = df1.copy()
df2_orig = df2.copy()

result = df1.join(df2, on="key")

if using_copy_on_write:
assert np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert np.shares_memory(get_array(result, "b"), get_array(df2, "b"))
assert np.shares_memory(get_array(result.index), get_array(df1.index))
assert not np.shares_memory(get_array(result.index), get_array(df2.index))
else:
assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert not np.shares_memory(get_array(result, "b"), get_array(df2, "b"))

result.iloc[0, 0] = 0
if using_copy_on_write:
assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert np.shares_memory(get_array(result, "b"), get_array(df2, "b"))

result.iloc[0, 1] = 0
if using_copy_on_write:
assert not np.shares_memory(get_array(result, "b"), get_array(df2, "b"))

tm.assert_frame_equal(df1, df1_orig)
tm.assert_frame_equal(df2, df2_orig)


def test_join_multiple_dataframes_on_key(using_copy_on_write):
df_index = Index(["a", "b", "c"], name="key")

df1 = DataFrame({"a": [1, 2, 3]}, index=df_index.copy(deep=True))
dfs_list = [
DataFrame({"b": [4, 5, 6]}, index=df_index.copy(deep=True)),
DataFrame({"c": [7, 8, 9]}, index=df_index.copy(deep=True)),
]

df1_orig = df1.copy()
dfs_list_orig = [df.copy() for df in dfs_list]

result = df1.join(dfs_list)

if using_copy_on_write:
assert np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
assert np.shares_memory(get_array(result.index), get_array(df1.index))
assert not np.shares_memory(
get_array(result.index), get_array(dfs_list[0].index)
)
assert not np.shares_memory(
get_array(result.index), get_array(dfs_list[1].index)
)
else:
assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert not np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
assert not np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))

result.iloc[0, 0] = 0
if using_copy_on_write:
assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
assert np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))

result.iloc[0, 1] = 0
if using_copy_on_write:
assert not np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))

result.iloc[0, 2] = 0
if using_copy_on_write:
assert not np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))

tm.assert_frame_equal(df1, df1_orig)
for df, df_orig in zip(dfs_list, dfs_list_orig):
tm.assert_frame_equal(df, df_orig)
assert not np.shares_memory(get_array(df2, "b"), get_array(result, "b"))