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local class = require 'pl.class'
local test = require 'pl.test'
asserteq = test.asserteq
T = test.tuple
A = class()
function A:_init ()
self.a = 1
end
-- calling base class' ctor automatically
A1 = class(A)
asserteq(A1(),{a=1})
-- explicitly calling base ctor with super
B = class(A)
function B:_init ()
self:super()
self.b = 2
end
function B:foo ()
self.eee = 1
end
function B:foo2 ()
self.g = 8
end
asserteq(B(),{a=1,b=2})
-- can continue this chain
C = class(B)
function C:_init ()
self:super()
self.c = 3
end
function C:foo ()
-- recommended way to call inherited version of method...
B.foo(self)
end
c = C()
c:foo()
asserteq(c,{a=1,b=2,c=3,eee=1})
-- test indirect inherit
D = class(C)
E = class(D)
function E:_init ()
self:super()
self.e = 4
end
function E:foo ()
-- recommended way to call inherited version of method...
self.eeee = 5
C.foo(self)
end
F = class(E)
function F:_init ()
self:super()
self.f = 6
end
f = F()
f:foo()
f:foo2() -- Test : invocation inherits this function from all the way up in B
asserteq(f,{a=1,b=2,c=3,eee=1,e=4,eeee=5,f=6,g=8})
-- Test that inappropriate calls to super() fail gracefully
G = class() -- Class with no init
H = class(G) -- Class with an init that wrongly calls super()
function H:_init()
self:super() -- Notice: G has no _init
end
I = class(H) -- Inherits the init with a bad super
J = class(I) -- Grandparent-inits the init with a bad super
K = class(J) -- Has an init, which calls the init with a bad super
function K:_init()
self:super()
end
local function createG()
return G()
end
local function createH() -- Wrapper function for pcall
return H()
end
local function createJ()
return J()
end
local function createK()
return K()
end
assert(pcall(createG)) -- Should succeed
assert(not pcall(createH)) -- These three should fail
assert(not pcall(createJ))
assert(not pcall(createK))
--- class methods!
assert(c:is_a(C))
assert(c:is_a(B))
assert(c:is_a(A))
assert(c:is_a() == C)
assert(C:class_of(c))
assert(B:class_of(c))
assert(A:class_of(c))
--- metamethods!
function C:__tostring ()
return ("%d:%d:%d"):format(self.a,self.b,self.c)
end
function C.__eq (c1,c2)
return c1.a == c2.a and c1.b == c2.b and c1.c == c2.c
end
asserteq(C(),{a=1,b=2,c=3})
asserteq(tostring(C()),"1:2:3")
asserteq(C()==C(),true)
----- properties -----
local MyProps = class(class.properties)
local setted_a, got_b
function MyProps:_init ()
self._a = 1
self._b = 2
end
function MyProps:set_a (v)
setted_a = true
self._a = v
end
function MyProps:get_b ()
got_b = true
return self._b
end
function MyProps:set (a,b)
self._a = a
self._b = b
end
local mp = MyProps()
mp.a = 10
asserteq(mp.a,10)
asserteq(mp.b,2)
asserteq(setted_a and got_b, true)
class.MoreProps(MyProps)
local setted_c
function MoreProps:_init()
self:super()
self._c = 3
end
function MoreProps:set_c (c)
setted_c = true
self._c = c
end
mm = MoreProps()
mm:set(10,20)
mm.c = 30
asserteq(setted_c, true)
asserteq(T(mm.a, mm.b, mm.c),T(10,20,30))
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