def test_instanciation_errors():
"""Check errors when instanciating a new Polyhedron."""
with pytest.raises(ValueError) as excinfo:
Tetrahedron(Point(0, 0, 0), Point(1, 0, 0))
assert str(excinfo.value) == 'At least four Points are required to be '\
'able to build a Polyhedron. Found only 2 positional arguments, '\
'though.'
with pytest.raises(TypeError) as excinfo:
Tetrahedron(Point(0, 0, 0), Point(1, 0, 0), Point(0, 1, 0),
'Point(0, 0, 1)')
assert str(excinfo.value) == 'Only Points must be provided in order to '\
'build a Polyhedron. Yet found <class \'str\'> as positional '\
'argument #3.'
Point.reset_names()
with pytest.raises(TypeError) as excinfo:
Tetrahedron(Point(0, 0), Point(1, 0, 0), Point(0, 1, 0),
Point(0, 0, 1))
assert str(excinfo.value) == 'Points used to build a Polyhedron must '\
'be three-dimensional Points. Found a two-dimensional Point '\
'instead: Point A(0, 0).'
with pytest.raises(TypeError) as excinfo:
Tetrahedron(Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
name=1234)
assert str(excinfo.value) == 'name must be a str, found 1234 instead.'
with pytest.raises(ValueError) as excinfo:
Tetrahedron(Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
name='ABCDE')
assert str(excinfo.value) == 'A polyhedron\'s name must contain as many '\
'letters as the polyhedron\'s number of vertices, yet found 5 '\
'letters (name: \'ABCDE\') and 4 vertices.'
with pytest.raises(TypeError) as excinfo:
Tetrahedron(Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
draw_vertices=1)
assert str(excinfo.value) == 'draw_vertices must be a boolean; ' \
'got <class \'int\'> instead.'
with pytest.raises(TypeError) as excinfo:
Tetrahedron(Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
label_vertices=0)
assert str(excinfo.value) == 'label_vertices must be a boolean; ' \
'got <class \'int\'> instead.'
def test_instanciation():
"""Check new Polyhedrons instanciations."""
Point.reset_names()
t = Tetrahedron(Point(0, 0, 0), Point(1, 0, 0), Point(0, 1, 0),
Point(0, 0, 1))
assert t.name == 'ABCD'
assert t.label_vertices
assert not t.draw_vertices
assert t.vertices == [
Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1)
]
assert t.edges == [
LineSegment(Point(0, 0, 0), Point(1, 0, 0)),
LineSegment(Point(1, 0, 0), Point(0, 1, 0)),
LineSegment(Point(0, 1, 0), Point(0, 0, 0)),
LineSegment(Point(0, 1, 0), Point(0, 0, 1)),
LineSegment(Point(0, 0, 1), Point(0, 0, 0)),
LineSegment(Point(0, 0, 1), Point(1, 0, 0))
]
assert t.faces == [
Triangle(Point(0, 0, 0, 'A'), Point(1, 0, 0, 'B'), Point(0, 1, 0,
'C')),
Triangle(Point(0, 0, 0, 'A'), Point(0, 1, 0, 'C'), Point(0, 0, 1,
'D')),
Triangle(Point(0, 0, 0, 'A'), Point(0, 0, 1, 'D'), Point(1, 0, 0,
'B')),
Triangle(Point(1, 0, 0, 'B'), Point(0, 1, 0, 'C'), Point(0, 0, 1, 'D'))
]
Point.reset_names()
t = Tetrahedron(Point(0, 0, 0),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
name='SABC')
assert t.name == 'SABC'
t = Tetrahedron(Point(0, 0, 0, label='?'),
Point(1, 0, 0),
Point(0, 1, 0),
Point(0, 0, 1),
name='SABC')
def test_instanciation_errors():
"""Check Vector's instanciation exceptions."""
Point.reset_names()
with pytest.raises(TypeError) as excinfo:
Vector()
assert str(excinfo.value) == 'Vector() takes one, two or three arguments '\
'(0 given)'
with pytest.raises(TypeError) as excinfo:
Vector(Point(0, 0))
assert str(excinfo.value) == 'a Vector can be created from one Bipoint, '\
'found Point A(0, 0) instead.'
Point.reset_names()
with pytest.raises(TypeError) as excinfo:
Vector(Point(0, 0), 4)
assert str(excinfo.value) == 'a Vector can be created from two '\
'arguments, either two Points or two numbers. Found Point A(0, 0) '\
'and 4 instead.'
with pytest.raises(ZeroVector) as excinfo:
Vector(Point(1, 1), Point(1, 1), allow_zero_length=False)
assert str(excinfo.value) == 'Explicitly disallowed creation of a '\
'zero-length Vector.'
def test_automatic_naming():
"""Check automatic naming of Points."""
Point.reset_names()
Point(0, 0, 'A')
q = Point(1, 1)
assert q.name == 'B'
Point.reset_names()
q = Point(1, 1)
assert q.name == 'A'
q = Point(1, 1, 'C')
q = Point(1, 1)
assert q.name == 'B'
q = Point(1, 1)
assert q.name == 'D'
for _ in range(23):
q = Point(1, 1)
assert q.name == 'A$_1$'
for _ in range(26):
q = Point(1, 1)
assert q.name == 'A$_2$'
Point.reset_names()
p = Point(1, 1) # 'A'
q = Point(1, 1) # 'B'
assert q.name == 'B'
p.name = 'C' # 'A' is free
q = Point(1, 1)
assert q.name == 'A'
q = Point(1, 1)
assert q.name == 'D'
def test_drawing_angles_with_armspoints():
"""Check drawing standalone Angles."""
A = Point(0, 0, 'A')
X1 = Point(6, 1, 'X1')
Y1 = Point(3, 5, 'Y1')
α = Angle(X1,
A,
Y1,
armspoints=[('X', ), ('Y', )],
label_vertex=True,
draw_vertex=True)
assert α.drawn == r"""
\begin{tikzpicture}
% Declare Points
\coordinate (X1) at (6,1);
\coordinate (A) at (0,0);
\coordinate (Y1) at (3,5);
\coordinate (X) at (4.8,0.8);
\coordinate (Y) at (2.4,4);
% Draw Angle
\draw[thick] (X1) -- (A) -- (Y1);
% Draw Vertex
\draw (A) node[scale=0.67] {$\times$};
% Draw Arms' Points
\draw (X) node[scale=0.67] {$\times$};
\draw (Y) node[scale=0.67] {$\times$};
% Label Points
\draw (A) node[below left] {A};
\draw (X) node[below right] {X};
\draw (Y) node[above left] {Y};
\end{tikzpicture}
"""
Point.reset_names()
A = Point(0, 0, 'A')
X1 = Point(6, 1, 'X1')
Y1 = Point(3, 5, 'Y1')
α = Angle(X1,
A,
Y1,
armspoints=[('X', ), ('Y', )],
label_vertex=True,
draw_vertex=True)
α.armspoints = [('', ), (None, )]
assert α.drawn == r"""
\begin{tikzpicture}
% Declare Points
\coordinate (X1) at (6,1);
\coordinate (A) at (0,0);
\coordinate (Y1) at (3,5);
\coordinate (B) at (4.8,0.8);
\coordinate (C) at (2.4,4);
% Draw Angle
\draw[thick] (X1) -- (A) -- (Y1);
% Draw Vertex
\draw (A) node[scale=0.67] {$\times$};
% Draw Arms' Points
\draw (B) node[scale=0.67] {$\times$};
\draw (C) node[scale=0.67] {$\times$};
% Label Points
\draw (A) node[below left] {A};
\draw (B) node[below right] {B};
\draw (C) node[above left] {C};
\end{tikzpicture}
"""
Point.reset_names()
Ω = Point(0, 0, 'O')
A1 = Point('2.5', 0, 'A1')
D1 = Point(-2, '1.5', 'D1')
α = Angle(A1,
Ω,
D1,
armspoints=[('C', ), ('E', )],
label_vertex=True,
draw_vertex=True,
label_armspoints=True,
draw_armspoints=True)
assert α.drawn == r"""
