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https://github.com/bryanthaboi/gen1recomp.git
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bryanthaboi
85 lines
3.1 KiB
Lua
85 lines
3.1 KiB
Lua
-- Parity test, GBC FX ladder (Pixel Transparency shader).
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-- Unit-tests the Lua-side API of src/render/GBCFX.lua headless under the
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-- love stub: level clamping, the OFF→1→2→3→4→OFF cycle, options plumbing,
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-- level labels, and that active()/present() degrade gracefully when the
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-- stub offers no love.graphics.newShader (shader() returns nil).
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package.path = "./?.lua;./?/init.lua;" .. package.path
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if not _G.love then _G.love = require("tests.love_stub") end
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local S = require("tests.harness").suite("parity gbcfx")
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local check, eq = S.check, S.eq
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-- === assertions ===
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local GBCFX = require("src.render.GBCFX")
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-- defaults
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eq(GBCFX.level, 0, "gbcfx starts at level 0 (OFF)")
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eq(#GBCFX.LABELS, 5, "five labels (OFF + 4 levels)")
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eq(GBCFX.LABELS[1], "OFF", "first label is OFF")
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-- setLevel clamps and floors
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GBCFX.setLevel(2)
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eq(GBCFX.level, 2, "setLevel stores an in-range level")
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GBCFX.setLevel(-3)
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eq(GBCFX.level, 0, "setLevel clamps below to 0")
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GBCFX.setLevel(99)
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eq(GBCFX.level, 4, "setLevel clamps above to 4")
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GBCFX.setLevel(2.9)
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eq(GBCFX.level, 2, "setLevel floors fractional levels")
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GBCFX.setLevel("3")
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eq(GBCFX.level, 3, "setLevel accepts numeric strings")
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GBCFX.setLevel(nil)
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eq(GBCFX.level, 0, "setLevel(nil) resets to OFF")
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GBCFX.setLevel("junk")
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eq(GBCFX.level, 0, "setLevel(non-numeric) resets to OFF")
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-- cycle wraps OFF→1→2→3→4→OFF and returns the new level
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GBCFX.setLevel(0)
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eq(GBCFX.cycle(), 1, "cycle OFF -> 1")
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eq(GBCFX.cycle(), 2, "cycle 1 -> 2")
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eq(GBCFX.cycle(), 3, "cycle 2 -> 3")
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eq(GBCFX.cycle(), 4, "cycle 3 -> 4")
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eq(GBCFX.cycle(), 0, "cycle 4 wraps to OFF")
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eq(GBCFX.level, 0, "cycle leaves the wrapped level stored")
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-- applyOptions reads opts.gbcfx
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GBCFX.applyOptions({ gbcfx = 3 })
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eq(GBCFX.level, 3, "applyOptions reads opts.gbcfx")
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GBCFX.applyOptions({})
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eq(GBCFX.level, 0, "applyOptions without gbcfx resets to OFF")
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GBCFX.setLevel(2)
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GBCFX.applyOptions(nil)
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eq(GBCFX.level, 0, "applyOptions(nil) resets to OFF")
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-- labels
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eq(GBCFX.levelLabel(0), "OFF", "label for level 0")
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eq(GBCFX.levelLabel(1), "1", "label for level 1")
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eq(GBCFX.levelLabel(4), "4", "label for level 4")
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GBCFX.setLevel(3)
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eq(GBCFX.levelLabel(), "3", "levelLabel() defaults to the current level")
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eq(GBCFX.levelLabel(42), "OFF", "out-of-range label falls back to OFF")
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-- headless: the love stub has no newShader, so the shader never compiles
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eq(GBCFX.shader(), nil, "shader() is nil headless")
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GBCFX.setLevel(4)
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check(not GBCFX.active(), "active() is false headless even at level 4")
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-- present() falls back to a plain draw when the shader is unavailable
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local drawn = nil
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local g = love.graphics
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local oldDraw, oldSetColor = g.draw, g.setColor
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g.draw = function(c, x, y) drawn = { c, x, y } end
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g.setColor = g.setColor or function() end
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local canvas = {}
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local ok, err = pcall(GBCFX.present, canvas, 5)
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g.draw = oldDraw
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g.setColor = oldSetColor
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check(ok, "present() does not error headless (" .. tostring(err) .. ")")
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check(drawn and drawn[1] == canvas and drawn[2] == 0 and drawn[3] == 0,
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"present() falls back to a plain draw at (0,0)")
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GBCFX.setLevel(0)
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-- === summary ===
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S.finish()
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