def test_float(self):
FloatModel.objects.create(f1=-27.5, f2=0.33)
obj = FloatModel.objects.annotate(f1_cot=Cot('f1'), f2_cot=Cot('f2')).first()
self.assertIsInstance(obj.f1_cot, float)
self.assertIsInstance(obj.f2_cot, float)
self.assertAlmostEqual(obj.f1_cot, 1 / math.tan(obj.f1))
self.assertAlmostEqual(obj.f2_cot, 1 / math.tan(obj.f2))
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('-12.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_cot=Cot('n1'), n2_cot=Cot('n2')).first()
self.assertIsInstance(obj.n1_cot, Decimal)
self.assertIsInstance(obj.n2_cot, Decimal)
self.assertAlmostEqual(obj.n1_cot, Decimal(1 / math.tan(obj.n1)))
self.assertAlmostEqual(obj.n2_cot, Decimal(1 / math.tan(obj.n2)))
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal("-12.9"), n2=Decimal("0.6"))
obj = DecimalModel.objects.annotate(n1_cot=Cot("n1"),
n2_cot=Cot("n2")).first()
self.assertIsInstance(obj.n1_cot, Decimal)
self.assertIsInstance(obj.n2_cot, Decimal)
self.assertAlmostEqual(obj.n1_cot, Decimal(1 / math.tan(obj.n1)))
self.assertAlmostEqual(obj.n2_cot, Decimal(1 / math.tan(obj.n2)))
def test_integer(self):
IntegerModel.objects.create(small=-5, normal=15, big=-1)
obj = IntegerModel.objects.annotate(
small_cot=Cot('small'),
normal_cot=Cot('normal'),
big_cot=Cot('big'),
).first()
self.assertIsInstance(obj.small_cot, float)
self.assertIsInstance(obj.normal_cot, float)
self.assertIsInstance(obj.big_cot, float)
self.assertAlmostEqual(obj.small_cot, 1 / math.tan(obj.small))
self.assertAlmostEqual(obj.normal_cot, 1 / math.tan(obj.normal))
self.assertAlmostEqual(obj.big_cot, 1 / math.tan(obj.big))
def test_cot(self):
"""
Tests cot function on a column.
"""
q1 = Author.objects.values("num").annotate(num_cot=Cot("num"), )
compiler = SQLCompiler(q1.query, self.connection, "default")
sql_query, params = compiler.query.as_sql(compiler, self.connection)
self.assertEqual(
sql_query,
"SELECT tests_author.num, (1 / TAN(tests_author.num)) AS num_cot "
+ "FROM tests_author",
)
self.assertEqual(params, ())
def test_null(self):
IntegerModel.objects.create()
obj = IntegerModel.objects.annotate(null_cot=Cot('normal')).first()
self.assertIsNone(obj.null_cot)