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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
"""Tests for coverage.numbits"""
from __future__ import annotations
import json
import sqlite3
from typing import Iterable, Set
from hypothesis import example, given, settings
from hypothesis.strategies import sets, integers
from coverage import env
from coverage.numbits import (
nums_to_numbits, numbits_to_nums, numbits_union, numbits_intersection,
numbits_any_intersection, num_in_numbits, register_sqlite_functions,
)
from tests.coveragetest import CoverageTest
# Hypothesis-generated line number data
line_numbers = integers(min_value=1, max_value=9999)
line_number_sets = sets(line_numbers)
# When coverage-testing ourselves, hypothesis complains about a test being
# flaky because the first run exceeds the deadline (and fails), and the second
# run succeeds. Disable the deadline if we are coverage-testing.
default_settings = settings()
if env.METACOV:
default_settings = settings(default_settings, deadline=None)
def good_numbits(numbits: bytes) -> None:
"""Assert that numbits is good."""
# It shouldn't end with a zero byte, that should have been trimmed off.
assert (not numbits) or (numbits[-1] != 0)
class NumbitsOpTest(CoverageTest):
"""Tests of the numbits operations in numbits.py."""
run_in_temp_dir = False
@given(line_number_sets)
@settings(default_settings)
def test_conversion(self, nums: Iterable[int]) -> None:
numbits = nums_to_numbits(nums)
good_numbits(numbits)
nums2 = numbits_to_nums(numbits)
assert nums == set(nums2)
@given(line_number_sets, line_number_sets)
@settings(default_settings)
def test_union(self, nums1: Set[int], nums2: Set[int]) -> None:
nb1 = nums_to_numbits(nums1)
good_numbits(nb1)
nb2 = nums_to_numbits(nums2)
good_numbits(nb2)
nbu = numbits_union(nb1, nb2)
good_numbits(nbu)
union = numbits_to_nums(nbu)
assert nums1 | nums2 == set(union)
@given(line_number_sets, line_number_sets)
@settings(default_settings)
def test_intersection(self, nums1: Set[int], nums2: Set[int]) -> None:
nb1 = nums_to_numbits(nums1)
good_numbits(nb1)
nb2 = nums_to_numbits(nums2)
good_numbits(nb2)
nbi = numbits_intersection(nb1, nb2)
good_numbits(nbi)
intersection = numbits_to_nums(nbi)
assert nums1 & nums2 == set(intersection)
@given(line_number_sets, line_number_sets)
@settings(default_settings)
def test_any_intersection(self, nums1: Set[int], nums2: Set[int]) -> None:
nb1 = nums_to_numbits(nums1)
good_numbits(nb1)
nb2 = nums_to_numbits(nums2)
good_numbits(nb2)
inter = numbits_any_intersection(nb1, nb2)
expect = bool(nums1 & nums2)
assert expect == bool(inter)
@given(line_numbers, line_number_sets)
@settings(default_settings)
@example(152, {144})
def test_num_in_numbits(self, num: int, nums: Iterable[int]) -> None:
numbits = nums_to_numbits(nums)
good_numbits(numbits)
is_in = num_in_numbits(num, numbits)
assert (num in nums) == is_in
class NumbitsSqliteFunctionTest(CoverageTest):
"""Tests of the SQLite integration for numbits functions."""
run_in_temp_dir = False
def setUp(self) -> None:
super().setUp()
conn = sqlite3.connect(":memory:")
register_sqlite_functions(conn)
self.cursor = conn.cursor()
self.cursor.execute("create table data (id int, numbits blob)")
self.cursor.executemany(
"insert into data (id, numbits) values (?, ?)",
[
(i, nums_to_numbits(range(i, 100, i)))
for i in range(1, 11)
]
)
self.addCleanup(self.cursor.close)
def test_numbits_union(self) -> None:
res = self.cursor.execute(
"select numbits_union(" +
"(select numbits from data where id = 7)," +
"(select numbits from data where id = 9)" +
")"
)
expected = [
7, 9, 14, 18, 21, 27, 28, 35, 36, 42, 45, 49,
54, 56, 63, 70, 72, 77, 81, 84, 90, 91, 98, 99,
]
answer = numbits_to_nums(list(res)[0][0])
assert expected == answer
def test_numbits_intersection(self) -> None:
res = self.cursor.execute(
"select numbits_intersection(" +
"(select numbits from data where id = 7)," +
"(select numbits from data where id = 9)" +
")"
)
answer = numbits_to_nums(list(res)[0][0])
assert [63] == answer
def test_numbits_any_intersection(self) -> None:
res = self.cursor.execute(
"select numbits_any_intersection(?, ?)",
(nums_to_numbits([1, 2, 3]), nums_to_numbits([3, 4, 5]))
)
answer = [any_inter for (any_inter,) in res]
assert [1] == answer
res = self.cursor.execute(
"select numbits_any_intersection(?, ?)",
(nums_to_numbits([1, 2, 3]), nums_to_numbits([7, 8, 9]))
)
answer = [any_inter for (any_inter,) in res]
assert [0] == answer
def test_num_in_numbits(self) -> None:
res = self.cursor.execute("select id, num_in_numbits(12, numbits) from data order by id")
answer = [is_in for (id, is_in) in res]
assert [1, 1, 1, 1, 0, 1, 0, 0, 0, 0] == answer
def test_numbits_to_nums(self) -> None:
res = self.cursor.execute("select numbits_to_nums(?)", [nums_to_numbits([1, 2, 3])])
assert [1, 2, 3] == json.loads(res.fetchone()[0])
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