86 lines
2.0 KiB
Lua
86 lines
2.0 KiB
Lua
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local class = require 'middleclass'
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local it = require('busted').it
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local describe = require('busted').describe
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local before_each = require('busted').before_each
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local assert = require('busted').assert
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describe('Lua 5.2 Metamethods', function()
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local Vector, v
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before_each(function()
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Vector= class('Vector')
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function Vector.initialize(a,x,y,z) a.x, a.y, a.z = x,y,z end
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function Vector.__eq(a,b) return a.x==b.x and a.y==b.y and a.z==b.z end
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function Vector.__len(a) return 3 end
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function Vector.__pairs(a)
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local t = {x=a.x,y=a.y,z=a.z}
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return coroutine.wrap(function()
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for k,val in pairs(t) do
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coroutine.yield(k,val)
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end
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end)
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end
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function Vector.__ipairs(a)
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local t = {a.x,a.y,a.z}
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return coroutine.wrap(function()
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for k,val in ipairs(t) do
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coroutine.yield(k,val)
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end
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end)
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end
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v = Vector:new(1,2,3)
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end)
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it('implements __len', function()
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assert.equal(#v, 3)
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end)
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it('implements __pairs',function()
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local output = {}
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for k,val in pairs(v) do
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output[k] = val
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end
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assert.are.same(output,{x=1,y=2,z=3})
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end)
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it('implements __ipairs',function()
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local output = {}
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for _,i in ipairs(v) do
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output[#output+1] = i
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end
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assert.are.same(output,{1,2,3})
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end)
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describe('Inherited Metamethods', function()
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local Vector2, v2
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before_each(function()
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Vector2= class('Vector2', Vector)
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function Vector2:initialize(x,y,z) Vector.initialize(self,x,y,z) end
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v2 = Vector2:new(1,2,3)
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end)
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it('implements __len', function()
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assert.equal(#v2, 3)
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end)
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it('implements __pairs',function()
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local output = {}
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for k,val in pairs(v2) do
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output[k] = val
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end
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assert.are.same(output,{x=1,y=2,z=3})
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end)
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it('implements __ipairs',function()
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local output = {}
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for _,i in ipairs(v2) do
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output[#output+1] = i
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end
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assert.are.same(output,{1,2,3})
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end)
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end)
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end)
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