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test_composite_keys.py
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from csv_diff import load_csv, compare
import io
# Multi-key Tests
# Base CSV: MULTI_KEY_BASE
MULTI_KEY_BASE = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,2
CUST-001,2022-01-02 11:00:00,Table,1
CUST-002,2022-01-02 11:00:00,Desk,3"""
# Modified CSV: MULTI_KEY_ROW_CHANGED
MULTI_KEY_ROW_CHANGED = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,3
CUST-001,2022-01-02 11:00:00,Table,1
CUST-002,2022-01-02 11:00:00,Desk,3"""
# Modified CSV: MULTI_KEY_ROW_ADDED
MULTI_KEY_ROW_ADDED = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,2
CUST-001,2022-01-02 11:00:00,Table,1
CUST-002,2022-01-02 11:00:00,Desk,3
CUST-003,2022-01-03 12:00:00,Bookshelf,1"""
# Modified CSV: MULTI_KEY_ROW_REMOVED
MULTI_KEY_ROW_REMOVED = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,2
CUST-002,2022-01-02 11:00:00,Desk,3"""
# Modified CSV: MULTI_KEY_ROW_REMOVED_AND_CHANGE
MULTI_KEY_ROW_REMOVED_AND_CHANGE = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,3
CUST-002,2022-01-02 11:00:00,Desk,3"""
# Modified CSV: MULTI_KEY_COLUMN_ADD
MULTI_KEY_COLUMN_ADD = """Customer ID,Timestamp,Product Name,Price
CUST-001,2022-01-01 10:00:00,Chair,19.99
CUST-001,2022-01-02 11:00:00,Table,49.99
CUST-002,2022-01-02 11:00:00,Desk,99.99"""
# Modified CSV: MULTI_KEY_PRIMARY_KEY_CHANGED
MULTI_KEY_PRIMARY_KEY_CHANGED = """Customer ID,Timestamp,Product Name,Quantity
CUST-001,2022-01-01 10:00:00,Chair,2
CUST-003,2022-01-02 11:00:00,Table,1
CUST-002,2022-01-02 11:00:00,Desk,3"""
# Multi-Key Tests
multi_key = ("Customer ID", "Timestamp")
def test_multi_key_row_changed():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_ROW_CHANGED), key=multi_key)
)
assert {
"added": [],
"removed": [],
"changed": [
{
"key": ("CUST-001", "2022-01-01 10:00:00"),
"changes": {"Quantity": ["2", "3"]}
}
],
"columns_added": [],
"columns_removed": [],
} == diff
def test_multi_key_row_added():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_ROW_ADDED), key=multi_key)
)
assert {
"changed": [],
"removed": [],
"added": [
{"Customer ID": "CUST-003", "Timestamp": "2022-01-03 12:00:00", "Product Name": "Bookshelf", "Quantity": "1"}
],
"columns_added": [],
"columns_removed": [],
} == diff
def test_multi_key_row_removed():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_ROW_REMOVED), key=multi_key)
)
assert {
"changed": [],
"removed": [
{"Customer ID": "CUST-001", "Timestamp": "2022-01-02 11:00:00", "Product Name": "Table", "Quantity": "1"}
],
"added": [],
"columns_added": [],
"columns_removed": [],
} == diff
def test_multi_key_row_removed_and_change():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_ROW_REMOVED_AND_CHANGE), key=multi_key)
)
assert {
"changed": [
{
"key": ("CUST-001", "2022-01-01 10:00:00"),
"changes": {"Quantity": ["2", "3"]}
}
],
"removed": [
{"Customer ID": "CUST-001", "Timestamp": "2022-01-02 11:00:00", "Product Name": "Table", "Quantity": "1"}
],
"added": [],
"columns_added": [],
"columns_removed": [],
} == diff
def test_multi_key_columns_changed():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_COLUMN_ADD), key=multi_key)
)
assert {
"changed": [],
"removed": [],
"added": [],
"columns_added": ["Price"],
"columns_removed": ["Quantity"],
} == diff
def test_multi_key_primary_key_removed_and_added():
diff = compare(
load_csv(io.StringIO(MULTI_KEY_BASE), key=multi_key),
load_csv(io.StringIO(MULTI_KEY_PRIMARY_KEY_CHANGED), key=multi_key)
)
assert {
"changed": [],
"removed": [{"Customer ID": "CUST-001", "Timestamp": "2022-01-02 11:00:00", "Product Name": "Table", "Quantity": "1"}],
"added": [{"Customer ID": "CUST-003", "Timestamp": "2022-01-02 11:00:00", "Product Name": "Table", "Quantity": "1"}],
"columns_added": [],
"columns_removed": [],
} == diff