| import os |
| import subprocess |
| from pathlib import Path |
|
|
| WORK = Path(os.environ["TB_WORK"]) |
| BASH = os.environ.get("TB_BASH", "bash") |
| CANON = "./bin/canon" |
|
|
|
|
| def run_canon(source, target): |
| return subprocess.run( |
| [BASH, "-c", 'exec ./bin/canon "$@"', "canon", str(source), str(target)], |
| cwd=str(WORK), |
| capture_output=True, |
| text=True, |
| encoding="utf-8", |
| ) |
|
|
|
|
| def case_dir(): |
| path = Path(os.environ["TB_ROOT"]) / "tmp" / "cases" |
| path.mkdir(parents=True, exist_ok=True) |
| return path |
|
|
|
|
| def write_case(name, body, newline=""): |
| path = case_dir() / name |
| with open(path, "w", encoding="utf-8", newline=newline) as handle: |
| handle.write(body) |
| return path |
|
|
|
|
| def test_missing_input_exits_2(): |
| target = case_dir() / "missing.tsv" |
| if target.exists(): |
| target.unlink() |
| proc = run_canon("does-not-exist.csv", target) |
| assert proc.returncode == 2, proc.stderr |
| assert proc.stderr.strip() == "no such file: does-not-exist.csv" |
| assert not target.exists(), "output must not be created on error" |
|
|
|
|
| def test_duplicate_column_exits_3(): |
| source = write_case("dup.csv", "id,ID\n1,2\n") |
| target = case_dir() / "dup.tsv" |
| if target.exists(): |
| target.unlink() |
| proc = run_canon(source, target) |
| assert proc.returncode == 3, proc.stderr |
| assert proc.stderr.strip() == "duplicate column: ID" |
| assert not target.exists() |
|
|
|
|
| def test_malformed_row_exits_4_with_physical_line(): |
| source = write_case("bad.csv", "id,sku\n1,a\n2,b,c\n") |
| target = case_dir() / "bad.tsv" |
| if target.exists(): |
| target.unlink() |
| proc = run_canon(source, target) |
| assert proc.returncode == 4, proc.stderr |
| assert proc.stderr.strip() == "malformed row: line 3" |
| assert not target.exists() |
|
|
|
|
| def test_orders_sample_is_canonicalised(): |
| target = case_dir() / "orders.tsv" |
| proc = run_canon("data/orders.csv", target) |
| assert proc.returncode == 0, proc.stderr |
| expected = ( |
| "id\tsku\tqty\tprice\n" |
| "1\tSKU-1\t5\t0.75\n" |
| "1\tSKU-2\t10\t2\n" |
| "2\tSKU-1\t5\t1000\n" |
| "3\tSKU-9\t2\t1.5\n" |
| ) |
| assert target.read_bytes() == expected.encode("utf-8") |
|
|
|
|
| def test_output_has_no_bom_and_uses_lf(): |
| target = case_dir() / "orders.tsv" |
| run_canon("data/orders.csv", target) |
| raw = target.read_bytes() |
| assert not raw.startswith(b"\xef\xbb\xbf") |
| assert b"\r" not in raw |
|
|
|
|
| def test_embedded_newline_survives(): |
| source = write_case("multi.csv", 'id,note\n2,"line one\nline two"\n1,plain\n') |
| target = case_dir() / "multi.tsv" |
| proc = run_canon(source, target) |
| assert proc.returncode == 0, proc.stderr |
| expected = "id\tnote\n1\tplain\n2\tline one\nline two\n" |
| assert target.read_bytes() == expected.encode("utf-8") |
|
|
|
|
| def test_numeric_normalisation(): |
| source = write_case( |
| "nums.csv", "id,v\n1,+5\n2,007\n3,-0\n4,1.0\n5,2.5e-3\n6,abc\n" |
| ) |
| target = case_dir() / "nums.tsv" |
| proc = run_canon(source, target) |
| assert proc.returncode == 0, proc.stderr |
| expected = "id\tv\n1\t5\n2\t7\n3\t0\n4\t1\n5\t0.0025\n6\tabc\n" |
| assert target.read_bytes() == expected.encode("utf-8") |
|
|
|
|
| def test_sorting_is_byte_order_not_numeric(): |
| source = write_case("ids.csv", "id,x\n10,a\n9,b\n") |
| target = case_dir() / "ids.tsv" |
| proc = run_canon(source, target) |
| assert proc.returncode == 0, proc.stderr |
| assert target.read_bytes() == b"id\tx\n10\ta\n9\tb\n" |
|
|
