def test_1(self):
ctx = pya.ExpressionContext()
self.assertEqual(ctx.eval("1+2"), 3)
ctx.var("a", 21)
self.assertEqual(ctx.eval("2*a"), 42)
expr = pya.Expression()
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'NoneType'>")
self.assertEqual(repr(res), "None")
expr = pya.Expression.eval("1+2")
self.assertEqual(str(type(expr)).replace("class", "type"), "<type 'float'>")
self.assertEqual(repr(expr), "3.0")
expr = pya.Expression()
expr.text = "1+2"
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'float'>")
self.assertEqual(str(res), "3.0")
expr = pya.Expression()
expr.var("a", 5)
expr.text = "a+to_i(2)"
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type").replace("int", "long"), "<type 'long'>")
self.assertEqual(str(res), "7")
expr.var("a", 7)
res = expr.eval()
self.assertEqual(str(res), "9")
pya.Expression.global_var("xxx", 17.5)
expr = pya.Expression("xxx+1")
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'float'>")
self.assertEqual(str(res), "18.5")
expr = pya.Expression("a+b*2", { "a": 18, "b": 2.5 })
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'float'>")
self.assertEqual(str(res), "23.0")
expr = pya.Expression("[a[1],a[2],a[0],a[4],a[3]]", { "a": [ 17, "a", None, [ 2, 7 ], { 8: "x", "u": 42 } ] })
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'list'>")
self.assertEqual(str(res) == "['a', None, 17L, {8L: 'x', 'u': 42L}, [2L, 7L]]" or str(res) == "['a', None, 17, {8: 'x', 'u': 42}, [2, 7]]", True)
expr = pya.Expression("a[1]", { "a": [ 17, "a", None, [ 2, 7 ], { 8: "x", "u": 42 } ] })
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'str'>")
self.assertEqual(str(res), "a")
expr = pya.Expression("a[4]", { "a": [ 17, "a", None, [ 2, 7 ], { 8: "x", "u": 42 } ] })
res = expr.eval()
self.assertEqual(str(type(res)).replace("class", "type"), "<type 'dict'>")
self.assertEqual(str(res) == "{8L: 'x', 'u': 42L}" or str(res) == "{8: 'x', 'u': 42}", True)
def test_2_Expression(self):
box1 = pya.Box(0, 100, 200, 300)
box2 = pya.Box(50, 150, 250, 350)
expr = pya.Expression("a", {"a": box1, "b": box2})
res = expr.eval()
self.assertEqual(str(res), "(0,100;200,300)")
# boxes are non-managed objects -> passing the object through the expression does not persist their ID
self.assertNotEqual(id(res), id(box1))
self.assertNotEqual(id(res), id(box2))
# -------------------------------------------------
box1 = pya.Box(0, 100, 200, 300)
box2 = pya.Box(50, 150, 250, 350)
expr = pya.Expression("a&b", {"a": box1, "b": box2})
res = expr.eval()
self.assertEqual(str(res), "(50,150;200,300)")
# computed objects are entirely new ones
self.assertNotEqual(id(res), id(box1))
self.assertNotEqual(id(res), id(box2))
# -------------------------------------------------
box1 = pya.Box(0, 100, 200, 300)
box2 = pya.Box(50, 150, 250, 350)
expr = pya.Expression("x=a&b; y=x; z=y; [x,y,z]", {
"a": box1,
"b": box2,
"x": None,
"y": None,
"z": None
})
res = expr.eval()
self.assertEqual(
str(res), "[(50,150;200,300), (50,150;200,300), (50,150;200,300)]")
# all objects are individual copies
self.assertNotEqual(id(res[0]), id(box1))
self.assertNotEqual(id(res[0]), id(box2))
self.assertNotEqual(id(res[1]), id(res[0]))
self.assertNotEqual(id(res[2]), id(res[0]))
# -------------------------------------------------
box1 = pya.Box(0, 100, 200, 300)
box2 = pya.Box(50, 150, 250, 350)
expr = pya.Expression("var x=a&b; var y=x; var z=y; [x,y,z]", {
"a": box1,
"b": box2
})
res = expr.eval()
self.assertEqual(
str(res), "[(50,150;200,300), (50,150;200,300), (50,150;200,300)]")
# all objects are individual copies
self.assertNotEqual(id(res[0]), id(box1))
self.assertNotEqual(id(res[0]), id(box2))
self.assertNotEqual(id(res[1]), id(res[0]))
self.assertNotEqual(id(res[2]), id(res[0]))
# destruction of the expression's object space does not matter since we have copies
expr._destroy()
self.assertEqual(
str(res), "[(50,150;200,300), (50,150;200,300), (50,150;200,300)]")
# -------------------------------------------------
region1 = pya.Region()
region1 |= pya.Box(0, 100, 200, 300)
region2 = pya.Region()
region2 |= pya.Box(50, 150, 250, 350)
expr = pya.Expression("a", {"a": region1, "b": region2})
res = expr.eval()
# regions are managed objects -> passing the object through the expression persists it's object ID
self.assertEqual(id(res), id(region1))
self.assertNotEqual(id(res), id(region2))
# -------------------------------------------------
region1 = pya.Region()
region1 |= pya.Box(0, 100, 200, 300)
region2 = pya.Region()
region2 |= pya.Box(50, 150, 250, 350)
expr = pya.Expression("a&b", {
"a": region1,
"b": region2,
"x": None,
"y": None,
"z": None
})
res = expr.eval()
self.assertEqual(str(res), "(50,150;50,300;200,300;200,150)")
# The returned object (as a new one) is an entirely fresh one
self.assertNotEqual(id(res), id(region1))
self.assertNotEqual(id(res), id(region2))
# -------------------------------------------------
region1 = pya.Region()
region1 |= pya.Box(0, 100, 200, 300)
region2 = pya.Region()
region2 |= pya.Box(50, 150, 250, 350)
expr = pya.Expression("x=a&b; y=x; z=y; [x,y,z]", {
"a": region1,
"b": region2,
"x": None,
"y": None,
"z": None
})
res = expr.eval()
self.assertEqual(
str(res),
"[(50,150;50,300;200,300;200,150), (50,150;50,300;200,300;200,150), (50,150;50,300;200,300;200,150)]"
)
# regions are managed objects -> passing the object through the expression persists it's object ID
self.assertNotEqual(id(res[0]), id(region1))
self.assertNotEqual(id(res[0]), id(region2))
self.assertEqual(id(res[1]), id(res[0]))
self.assertEqual(id(res[2]), id(res[0]))
# -------------------------------------------------
region1 = pya.Region()
region1 |= pya.Box(0, 100, 200, 300)
region2 = pya.Region()
region2 |= pya.Box(50, 150, 250, 350)
expr = pya.Expression("var x=a&b; var y=x; var z=y; [x,y,z]", {
"a": region1,
"b": region2
})
res = expr.eval()
self.assertEqual(
str(res),
"[(50,150;50,300;200,300;200,150), (50,150;50,300;200,300;200,150), (50,150;50,300;200,300;200,150)]"
)
# regions are managed objects -> passing the object through the expression persists it's object ID
self.assertNotEqual(id(res[0]), id(region1))
self.assertNotEqual(id(res[0]), id(region2))
self.assertEqual(id(res[1]), id(res[0]))
self.assertEqual(id(res[2]), id(res[0]))
# the result objects live in the expression object space and are destroyed with the expression
expr._destroy()
self.assertEqual(len(res), 3)
self.assertEqual(res[0].destroyed(), True)
self.assertEqual(res[1].destroyed(), True)
self.assertEqual(res[2].destroyed(), True)