Fix *Array.__newindex parameters (#10)

Author: gilzoide

src/godot_array_commons.lua

@@ -68,7 +68,7 @@ local function array_generate__index(methods)
 	end
 end
 
-local function array__newindex(methods)
+local function array__newindex(self, index, value)
 	array_safe_set(self, index - 1, value)
 end
 

src/test/array.lua

@@ -0,0 +1,31 @@
+local lu = require "luaunit"
+
+local Test = {}
+
+function Test:test_array_index()
+	local arr = Array(1, 3.14, 'hello!')
+	lu.assert_nil(arr[0])
+	lu.assert_equals(1, arr[1])
+	lu.assert_equals(3.14, arr[2])
+	lu.assert_equals(String 'hello!', arr[3])
+	lu.assert_nil(arr[4])
+end
+
+function Test:test_array_newindex()
+	local arr = Array()
+	arr[1] = 1
+	arr[2] = '2'
+
+	lu.assert_equals(1, arr[1])
+	lu.assert_equals(String '2', arr[2])
+	lu.assert_equals(2, #arr)
+
+	arr[1] = 2
+	arr[2] = '3'
+
+	lu.assert_equals(2, arr[1])
+	lu.assert_equals(String '3', arr[2])
+	lu.assert_equals(2, #arr)
+end
+
+return Test