From 463ccc7011cd7a25d3335707b651c154c5c8bacb Mon Sep 17 00:00:00 2001 From: Cold Fry Date: Sat, 2 May 2026 12:51:55 +0000 Subject: [PATCH] add failing tests documenting << and >>> bugs on lua 5.2+ --- package-lock.json | 419 ++-------------------------------- package.json | 2 +- test/unit/expressions.spec.ts | 20 ++ 3 files changed, 37 insertions(+), 404 deletions(-) diff --git a/package-lock.json b/package-lock.json index 28a32847e..149864df2 100644 --- a/package-lock.json +++ b/package-lock.json @@ -21,7 +21,7 @@ "devDependencies": { "@types/fs-extra": "^8.1.0", "@types/glob": "^7.2.0", - "@types/jest": "^27.5.2", + "@types/jest": "^29.5.14", "@types/node": "^22.10.0", "@types/picomatch": "^2.3.0", "@types/resolve": "1.14.0", @@ -91,7 +91,6 @@ "integrity": "sha512-BBt3opiCOxUr9euZ5/ro/Xv8/V7yJ5bjYMqG/C1YAo8MIKAnumZalCN+msbci3Pigy4lIQfPUpfMM27HMGaYEA==", "dev": true, "license": "MIT", - "peer": true, "dependencies": { "@ampproject/remapping": "^2.2.0", "@babel/code-frame": "^7.24.7", @@ -1004,41 +1003,6 @@ } } }, - 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"peer": true, "engines": { "node": ">=12" }, @@ -5535,7 +5150,6 @@ "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-10.9.2.tgz", "integrity": "sha512-f0FFpIdcHgn8zcPSbf1dRevwt047YMnaiJM3u2w2RewrB+fob/zePZcrOyQoLMMO7aBIddLcQIEK5dYjkLnGrQ==", "dev": true, - "peer": true, "dependencies": { "@cspotcode/source-map-support": "^0.8.0", "@tsconfig/node10": "^1.0.7", @@ -5616,7 +5230,6 @@ "integrity": "sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==", "dev": true, "license": "Apache-2.0", - "peer": true, "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" diff --git a/package.json b/package.json index aff9ba384..5f53841ae 100644 --- a/package.json +++ b/package.json @@ -54,7 +54,7 @@ "devDependencies": { "@types/fs-extra": "^8.1.0", "@types/glob": "^7.2.0", - "@types/jest": "^27.5.2", + "@types/jest": "^29.5.14", "@types/node": "^22.10.0", "@types/picomatch": "^2.3.0", "@types/resolve": "1.14.0", diff --git a/test/unit/expressions.spec.ts b/test/unit/expressions.spec.ts index 12fd85be1..d5cd9c245 100644 --- a/test/unit/expressions.spec.ts +++ b/test/unit/expressions.spec.ts @@ -146,6 +146,26 @@ for (const code of ["let a = -5; a >>>= 0; return a;", "let a = -1; a >>>= 16; r }); } +// Known bugs in << and >>> lowering on Lua 5.2/5.3+ (separate from PR #1721 / issue #1720): +// - `<<` does not truncate the result to int32 (e.g. `1 << 31` returns 2147483648, not -2147483648). +// - `<<` and `>>>` do not mask the shift amount to 5 bits like JS does. +// These tests are marked `failing` to document the divergence; remove `.failing` once fixed. +const knownBuggyTargets = [tstl.LuaTarget.Lua52, tstl.LuaTarget.Lua53, tstl.LuaTarget.Lua54, tstl.LuaTarget.Lua55]; +for (const expression of ["1 << 31", "0xFFFF << 16", "1 << 30 << 1", "1 << 32", "5 << 33"]) { + for (const target of knownBuggyTargets) { + test.failing(`Left shift execution (${expression}) [${target}]`, () => { + util.testExpression(expression).setOptions({ luaTarget: target }).expectToMatchJsResult(); + }); + } +} +for (const expression of ["1 >>> 32", "5 >>> 33", "-1 >>> 32"]) { + for (const target of knownBuggyTargets) { + test.failing(`Unsigned right shift count masking (${expression}) [${target}]`, () => { + util.testExpression(expression).setOptions({ luaTarget: target }).expectToMatchJsResult(); + }); + } +} + test.each(["1+1", "-1+1", "1*30+4", "1*(3+4)", "1*(3+4*2)", "10-(4+5)"])( "Binary expressions ordering parentheses (%p)", input => {