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import pytest
import psycopg
from psycopg import rows
from .utils import eur
def test_tuple_row(conn):
conn.row_factory = rows.dict_row
assert conn.execute("select 1 as a").fetchone() == {"a": 1}
cur = conn.cursor(row_factory=rows.tuple_row)
row = cur.execute("select 1 as a").fetchone()
assert row == (1,)
assert type(row) is tuple
assert cur._make_row is tuple
def test_dict_row(conn):
cur = conn.cursor(row_factory=rows.dict_row)
cur.execute("select 'bob' as name, 3 as id")
assert cur.fetchall() == [{"name": "bob", "id": 3}]
cur.execute("select 'a' as letter; select 1 as number")
assert cur.fetchall() == [{"letter": "a"}]
assert cur.nextset()
assert cur.fetchall() == [{"number": 1}]
assert not cur.nextset()
def test_namedtuple_row(conn):
rows._make_nt.cache_clear()
cur = conn.cursor(row_factory=rows.namedtuple_row)
cur.execute("select 'bob' as name, 3 as id")
(person1,) = cur.fetchall()
assert f"{person1.name} {person1.id}" == "bob 3"
ci1 = rows._make_nt.cache_info()
assert ci1.hits == 0 and ci1.misses == 1
cur.execute("select 'alice' as name, 1 as id")
(person2,) = cur.fetchall()
assert type(person2) is type(person1)
ci2 = rows._make_nt.cache_info()
assert ci2.hits == 1 and ci2.misses == 1
cur.execute("select 'foo', 1 as id")
(r0,) = cur.fetchall()
assert r0.f_column_ == "foo"
assert r0.id == 1
cur.execute("select 'a' as letter; select 1 as number")
(r1,) = cur.fetchall()
assert r1.letter == "a"
assert cur.nextset()
(r2,) = cur.fetchall()
assert r2.number == 1
assert not cur.nextset()
assert type(r1) is not type(r2)
cur.execute(f'select 1 as üåäö, 2 as _, 3 as "123", 4 as "a-b", 5 as "{eur}eur"')
(r3,) = cur.fetchall()
assert r3.üåäö == 1
assert r3.f_ == 2
assert r3.f123 == 3
assert r3.a_b == 4
assert r3.f_eur == 5
def test_class_row(conn):
cur = conn.cursor(row_factory=rows.class_row(Person))
cur.execute("select 'John' as first, 'Doe' as last")
(p,) = cur.fetchall()
assert isinstance(p, Person)
assert p.first == "John"
assert p.last == "Doe"
assert p.age is None
for query in (
"select 'John' as first",
"select 'John' as first, 'Doe' as last, 42 as wat",
):
cur.execute(query)
with pytest.raises(TypeError):
cur.fetchone()
def test_args_row(conn):
cur = conn.cursor(row_factory=rows.args_row(argf))
cur.execute("select 'John' as first, 'Doe' as last")
assert cur.fetchone() == "JohnDoe"
def test_kwargs_row(conn):
cur = conn.cursor(row_factory=rows.kwargs_row(kwargf))
cur.execute("select 'John' as first, 'Doe' as last")
(p,) = cur.fetchall()
assert isinstance(p, Person)
assert p.first == "John"
assert p.last == "Doe"
assert p.age == 42
def test_scalar_row(conn):
cur = conn.cursor(row_factory=rows.scalar_row)
cur.execute("select 1")
assert cur.fetchone() == 1
cur.execute("select 1, 2")
assert cur.fetchone() == 1
with pytest.raises(psycopg.ProgrammingError):
cur.execute("select")
@pytest.mark.parametrize(
"factory", "tuple_row dict_row namedtuple_row class_row args_row kwargs_row".split()
)
def test_no_result(factory, conn):
cur = conn.cursor(row_factory=factory_from_name(factory))
cur.execute("reset search_path")
with pytest.raises(psycopg.ProgrammingError):
cur.fetchone()
@pytest.mark.crdb_skip("no col query")
@pytest.mark.parametrize(
"factory", "tuple_row dict_row namedtuple_row args_row".split()
)
def test_no_column(factory, conn):
cur = conn.cursor(row_factory=factory_from_name(factory))
cur.execute("select")
recs = cur.fetchall()
assert len(recs) == 1
assert not recs[0]
@pytest.mark.crdb("skip")
def test_no_column_class_row(conn):
class Empty:
def __init__(self, x=10, y=20):
self.x = x
self.y = y
cur = conn.cursor(row_factory=rows.class_row(Empty))
cur.execute("select")
x = cur.fetchone()
assert isinstance(x, Empty)
assert x.x == 10
assert x.y == 20
def factory_from_name(name):
if (factory := getattr(rows, name)) is rows.class_row:
factory = factory(Person)
if factory is rows.args_row:
factory = factory(argf)
if factory is rows.kwargs_row:
factory = factory(argf)
return factory
class Person:
def __init__(self, first, last, age=None):
self.first = first
self.last = last
self.age = age
def argf(*args):
return "".join(map(str, args))
def kwargf(**kwargs):
return Person(**kwargs, age=42)
|
