def test_normalize(x, y):
assume(x != 0)
assume(y != 0)
a = Vector_C(x, y)
a.normalize()
assert abs(a.norm - 1) < eps
def test_limit(x, y, limits):
assume(x != 0)
assume(y != 0)
assume(limits)
a = Vector_C(x, y)
for limit in limits:
a.limit(limit)
assert abs(a.norm - abs(limit)) < eps or a.norm < abs(limit)
def test_init(x, y):
a = Vector_C()
assert a.x == 0
assert a.y == 0
a = Vector_C(x, y)
assert a.x == x
assert a.y == y
def test_set_mag(x, y, mags):
assume(x != 0)
assume(y != 0)
assume(mags)
assume(0 not in mags)
a = Vector_C(x, y)
for mag in mags:
a.set_mag(mag)
assert abs(a.norm - abs(mag)) < eps
def test_heading(x, y, length):
a = Vector_C(x, y)
assert math.atan2(a.y, a.x) == a.heading
assert -math.pi <= a.heading <= math.pi
a.set_mag(length)
b = Vector_C().from_angle(a.heading, length=a.norm)
assert abs(a.x - b.x) < eps
assert abs(a.y - b.y) < eps
def test_set(values):
x1, x2, y1, y2 = values
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
a.set(b)
assert a.x == b.x
assert a.y == b.y
assert a.x == x2
assert a.y == y2
def test_sub(x1, y1, x2, y2):
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
c = a - b
assert c.x == a.x - b.x
assert c.y == a.y - b.y
assert a.x == x1
assert a.y == y1
assert b.x == x2
assert b.y == y2
def test_add(x1, y1, x2, y2):
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
c = a + b
assert c.x == a.x + b.x
assert c.y == a.y + b.y
assert a.x == x1
assert a.y == y1
assert b.x == x2
assert b.y == y2
def test_dist(x1, y1, x2, y2):
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
eps = 1e-6
assert a.dist(b) == b.dist(a)
assert abs(a.dist(b) - distance(x1, x2, y1, y2)) < eps
assert abs(b.dist(a) - distance(x1, x2, y1, y2)) < eps
def test_isub(x1, y1, x2, y2):
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
c = a.copy()
a -= b
assert a.x == c.x - b.x
assert a.y == c.y - b.y
if x1 != 0 and x2 != 0:
assert a.x != c.x
if y1 != 0 and y2 != 0:
assert a.y != c.y
a -= Vector_C(1, 1)
assert a.x == c.x - b.x - 1
assert a.y == c.y - b.y - 1
def test_iadd(x1, y1, x2, y2):
a = Vector_C(x1, y1)
b = Vector_C(x2, y2)
c = a.copy()
a += b
assert a.x == c.x + b.x
assert a.y == c.y + b.y
if x1 != 0 and x2 != 0:
assert a.x != x2
if y1 != 0 and y2 != 0:
assert a.y != y2
a += Vector_C(1, 1)
assert a.x == c.x + b.x + 1
assert a.y == c.y + b.y + 1
def test_setter(x, y):
a = Vector_C()
assert a.x == 0
assert a.y == 0
a.x = x
assert a.x == x
assert a.y == 0
a.y = y
assert a.x == x
assert a.y == y
a.x = 0
a.y = 0
assert a.x == 0
assert a.y == 0
def test_mul(x, y, z):
a = Vector_C(x, y)
b = a * z
assert b.x == x * z
assert b.y == y * z
def test_random(_):
a = Vector_C().random()
assert -1 <= a.x <= 1
assert -1 <= a.y <= 1
def test_imul(x, y, z):
a = Vector_C(x, y)
a *= z
assert a.x == x * z
assert a.y == y * z
def test_from_angle(angle):
a = Vector_C().from_angle(angle)
assert abs(a.heading - angle) < eps
def test_norm(x, y):
a = Vector_C(x, y)
norm = a.norm
assert norm == math.sqrt(a.x**2 + a.y**2)
def test_zero(x, y):
a = Vector_C(x, y)
a.zero()
assert a.x == 0
assert a.y == 0
