mirror of
https://github.com/minetest-mods/mesecons.git
synced 2024-11-15 06:40:32 +01:00
236 lines
7.2 KiB
Lua
236 lines
7.2 KiB
Lua
require("mineunit")
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fixture("mesecons_fpga")
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describe("FPGA logic", function()
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local pos = {x = 0, y = 0, z = 0}
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local pos_a = {x = -1, y = 0, z = 0}
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local pos_b = {x = 0, y = 0, z = 1}
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local pos_c = {x = 1, y = 0, z = 0}
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local pos_d = {x = 0, y = 0, z = -1}
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local fpga_set = false
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local function set_fpga()
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if not fpga_set then
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world.set_node(pos, "mesecons_fpga:fpga0000")
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fpga_set = true
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end
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end
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before_each(set_fpga)
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local function reset_world()
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if fpga_set then
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mesecon._test_reset()
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world.clear()
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fpga_set = false
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end
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end
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after_each(reset_world)
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local function test_program(inputs, outputs, program)
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set_fpga()
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mesecon._test_program_fpga(pos, program)
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if inputs.a then mesecon._test_place(pos_a, "mesecons:test_receptor_on") end
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if inputs.b then mesecon._test_place(pos_b, "mesecons:test_receptor_on") end
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if inputs.c then mesecon._test_place(pos_c, "mesecons:test_receptor_on") end
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if inputs.d then mesecon._test_place(pos_d, "mesecons:test_receptor_on") end
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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local expected_name = "mesecons_fpga:fpga"
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.. (outputs.d and 1 or 0) .. (outputs.c and 1 or 0)
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.. (outputs.b and 1 or 0) .. (outputs.a and 1 or 0)
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assert.equal(expected_name, world.get_node(pos).name)
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reset_world()
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end
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it("operator and", function()
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local prog = {{"A", "AND", "B", "C"}}
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test_program({}, {}, prog)
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test_program({a = true}, {}, prog)
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test_program({b = true}, {}, prog)
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test_program({a = true, b = true}, {c = true}, prog)
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end)
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it("operator or", function()
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local prog = {{"A", "OR", "B", "C"}}
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test_program({}, {}, prog)
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test_program({a = true}, {c = true}, prog)
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test_program({b = true}, {c = true}, prog)
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test_program({a = true, b = true}, {c = true}, prog)
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end)
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it("operator not", function()
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local prog = {{"NOT", "A", "B"}}
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test_program({}, {b = true}, prog)
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test_program({a = true}, {}, prog)
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end)
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it("operator xor", function()
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local prog = {{"A", "XOR", "B", "C"}}
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test_program({}, {}, prog)
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test_program({a = true}, {c = true}, prog)
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test_program({b = true}, {c = true}, prog)
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test_program({a = true, b = true}, {}, prog)
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end)
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it("operator nand", function()
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local prog = {{"A", "NAND", "B", "C"}}
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test_program({}, {c = true}, prog)
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test_program({a = true}, {c = true}, prog)
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test_program({b = true}, {c = true}, prog)
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test_program({a = true, b = true}, {}, prog)
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end)
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it("operator buf", function()
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local prog = {{"=", "A", "B"}}
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test_program({}, {}, prog)
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test_program({a = true}, {b = true}, prog)
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end)
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it("operator xnor", function()
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local prog = {{"A", "XNOR", "B", "C"}}
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test_program({}, {c = true}, prog)
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test_program({a = true}, {}, prog)
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test_program({b = true}, {}, prog)
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test_program({a = true, b = true}, {c = true}, prog)
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end)
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it("operator nor", function()
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local prog = {{"A", "NOR", "B", "C"}}
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test_program({}, {c = true}, prog)
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test_program({a = true}, {}, prog)
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test_program({b = true}, {}, prog)
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test_program({a = true, b = true}, {}, prog)
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end)
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it("rejects duplicate operands", function()
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test_program({a = true}, {}, {{"A", "OR", "A", "B"}})
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test_program({a = true}, {}, {{"=", "A", "0"}, {"0", "OR", "0", "B"}})
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end)
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it("rejects unassigned memory operands", function()
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test_program({a = true}, {}, {{"A", "OR", "0", "B"}})
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test_program({a = true}, {}, {{"0", "OR", "A", "B"}})
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end)
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it("rejects double memory assignment", function()
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test_program({a = true}, {}, {{"=", "A", "0"}, {"=", "A", "0"}, {"=", "0", "B"}})
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end)
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it("rejects assignment to memory operand", function()
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test_program({a = true}, {}, {{"=", "A", "0"}, {"A", "OR", "0", "0"}, {"=", "0", "B"}})
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end)
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it("allows double port assignment", function()
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test_program({a = true}, {b = true}, {{"NOT", "A", "B"}, {"=", "A", "B"}})
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end)
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it("allows assignment to port operand", function()
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test_program({a = true}, {b = true}, {{"A", "OR", "B", "B"}})
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end)
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it("preserves initial pin states", function()
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test_program({a = true}, {b = true}, {{"=", "A", "B"}, {"=", "B", "C"}})
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end)
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it("rejects binary operations with single operands", function()
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test_program({a = true}, {}, {{"=", "A", "B"}, {" ", "OR", "A", "C"}})
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test_program({a = true}, {}, {{"=", "A", "B"}, {"A", "OR", " ", "C"}})
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end)
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it("rejects unary operations with first operands", function()
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test_program({a = true}, {}, {{"=", "A", "B"}, {"A", "=", " ", "C"}})
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end)
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it("rejects operations without destinations", function()
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test_program({a = true}, {}, {{"=", "A", "B"}, {"=", "A", " "}})
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end)
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it("allows blank statements", function()
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test_program({a = true}, {b = true, c = true}, {
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{" ", " ", " ", " "},
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{"=", "A", "B"},
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{" ", " ", " ", " "},
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{" ", " ", " ", " "},
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{"=", "A", "C"},
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})
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end)
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it("transmits changes", function()
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mesecon._test_program_fpga(pos, {
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{"=", "A", "B"},
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{"=", "A", "C"},
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{"NOT", "A", "D"},
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})
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mesecon._test_place(pos_b, "mesecons:test_effector")
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mesecon._test_place(pos_c, "mesecons:test_effector")
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mesecon._test_place(pos_d, "mesecons:test_effector")
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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-- Makes an object from the last three effector events in the list for use with assert.same.
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-- This is necessary to ignore the ordering of events.
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local function event_tester(list)
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local o = {list[#list - 2], list[#list - 1], list[#list - 0]}
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table.sort(o, function(a, b)
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local fmt = "%s %d %d %d"
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return fmt:format(a[1], a[2].x, a[2].y, a[2].z) < fmt:format(b[1], b[2].x, b[2].y, b[2].z)
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end)
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return o
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end
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mesecon._test_place(pos_a, "mesecons:test_receptor_on")
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga0110", world.get_node(pos).name)
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assert.same(event_tester({{"on", pos_b}, {"on", pos_c}, {"off", pos_d}}), event_tester(mesecon._test_effector_events))
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mesecon._test_dig(pos_a)
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga1000", world.get_node(pos).name)
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assert.same(event_tester({{"off", pos_b}, {"off", pos_c}, {"on", pos_d}}), event_tester(mesecon._test_effector_events))
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end)
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it("considers past outputs in determining inputs", function()
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-- Memory cell: Turning on A turns on C; turning on B turns off C.
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mesecon._test_program_fpga(pos, {
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{"A", "OR", "C", "0"},
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{"B", "OR", "D", "1"},
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{"NOT", "A", "2"},
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{"NOT", "B", "3"},
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{"0", "AND", "3", "C"},
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{"1", "AND", "2", "D"},
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})
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mesecon._test_place(pos_a, "mesecons:test_receptor_on")
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga0100", world.get_node(pos).name)
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mesecon._test_dig(pos_a)
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga0100", world.get_node(pos).name)
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mesecon._test_place(pos_b, "mesecons:test_receptor_on")
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga1000", world.get_node(pos).name)
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mesecon._test_dig(pos_b)
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mineunit:execute_globalstep()
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mineunit:execute_globalstep()
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assert.equal("mesecons_fpga:fpga1000", world.get_node(pos).name)
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end)
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end)
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