csv-diff/tests/test_csv_diff.py at 49a894ee3c738f5b0509d5b192a867ed339e5dc8 · simonw/csv-diff · GitHub

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from csv_diff import load_csv, compare
import io

ONE = """id,name,age
1,Cleo,4
2,Pancakes,2"""

ONE_TSV = """id\tname\tage
1\tCleo\t4
2\tPancakes\t2"""

TWO = """id,name,age
1,Cleo,5
2,Pancakes,2"""

TWO_TSV = """id\tname\tage
1\tCleo\t5
2\tPancakes\t2"""

THREE = """id,name,age
1,Cleo,5"""

FOUR = """id,name,age
1,Cleo,5
2,Pancakes,2,
3,Bailey,1"""

FIVE = """id,name,age
1,Cleo,5
2,Pancakes,2,
3,Bailey,1
4,Carl,7"""

SIX = """id,name,age
1,Cleo,5
3,Bailey,1"""

SEVEN = """id,name,weight
1,Cleo,48
3,Bailey,20"""

EIGHT = """id,name,age,length
3,Bailee,1,100
4,Bob,7,422"""

NINE = """id,name,age
1,Cleo,5
2,Pancakes,4"""

TEN = """id,name,age
1,Cleo,5
2,Pancakes,3"""

ELEVEN = """name, state, age
Ann, UT, 56
Ann, NY, 24
Lisa, CA, 35
Bill, FL, 33
Bill, WY, 23"""

TWELVE = """name, state, age
Ann, UT, 45
Ann, NY, 24
Lisa, CA, 35
Bill, WY, 23"""


def test_row_changed():
    diff = compare(
        load_csv(io.StringIO(ONE), key="id"), load_csv(io.StringIO(TWO), key="id")
    )
    assert {
        "added": [],
        "removed": [],
        "changed": [{"key": "1", "changes": {"age": ["4", "5"]}}],
        "columns_added": [],
        "columns_removed": [],
    } == diff


def test_row_added():
    diff = compare(
        load_csv(io.StringIO(THREE), key="id"), load_csv(io.StringIO(TWO), key="id")
    )
    assert {
        "changed": [],
        "removed": [],
        "added": [{"age": "2", "id": "2", "name": "Pancakes"}],
        "columns_added": [],
        "columns_removed": [],
    } == diff


def test_row_removed():
    diff = compare(
        load_csv(io.StringIO(TWO), key="id"), load_csv(io.StringIO(THREE), key="id")
    )
    assert {
        "changed": [],
        "removed": [{"age": "2", "id": "2", "name": "Pancakes"}],
        "added": [],
        "columns_added": [],
        "columns_removed": [],
    } == diff


def test_columns_changed():
    diff = compare(
        load_csv(io.StringIO(SIX), key="id"), load_csv(io.StringIO(SEVEN), key="id")
    )
    assert {
        "changed": [],
        "removed": [],
        "added": [],
        "columns_added": ["weight"],
        "columns_removed": ["age"],
    } == diff


def test_tsv():
    diff = compare(
        load_csv(io.StringIO(ONE), key="id"), load_csv(io.StringIO(TWO_TSV), key="id")
    )
    assert {
        "added": [],
        "removed": [],
        "changed": [{"key": "1", "changes": {"age": ["4", "5"]}}],
        "columns_added": [],
        "columns_removed": [],
    } == diff

def test_multi_key():
    diff = compare(
        load_csv(io.StringIO(ELEVEN), key=["name", "state"], key_sep='~'), load_csv(io.StringIO(TWELVE), key=["name", "state"], key_sep='~'),
    )
    assert {
        'added': [],
        'removed': [{'name': 'Bill', 'state': 'FL', 'age': '33'}],
        'changed': [{'key': 'Ann~UT', 'changes': {'age': ['56', '45']}}],
        'columns_added': [],
        'columns_removed': [],
    } == diff