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assignments.spec.ts
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518 lines (469 loc) · 13.2 KB
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import { unsupportedVarDeclaration } from "../../src/transformation/utils/diagnostics";
import * as util from "../util";
test.each(["const", "let"])("%s declaration not top-level is not global", declarationKind => {
util.testModule`
{
${declarationKind} foo = true;
}
// @ts-ignore
return "foo" in globalThis;
`.expectToEqual(false);
});
test.each(["const", "let"])("top-level %s declaration is global", declarationKind => {
// Can't be tested with expectToMatchJsResult because in JS that would not be global
util.testModule`
import './a';
export const result = foo;
`
.addExtraFile("a.ts", `${declarationKind} foo = true;`)
.expectToEqual({ result: true });
});
describe("var is disallowed", () => {
test("var declaration", () => {
util.testFunction`
var foo = true;
`.expectDiagnosticsToMatchSnapshot([unsupportedVarDeclaration.code]);
});
test("for loop", () => {
util.testFunction`
for (var foo = 0;;) {}
`.expectDiagnosticsToMatchSnapshot([unsupportedVarDeclaration.code]);
});
test("for...in loop", () => {
util.testFunction`
for (var foo in {}) {}
`.expectDiagnosticsToMatchSnapshot([unsupportedVarDeclaration.code]);
});
test("for...of loop", () => {
util.testFunction`
for (var foo of []) {}
`.expectDiagnosticsToMatchSnapshot([unsupportedVarDeclaration.code]);
});
});
test.each(["let result;", "const result = null;", "const result = undefined;"])(
"Null assignments (%p)",
declaration => {
util.testFunction`
${declaration}
return result;
`.expectToEqual(undefined);
}
);
test.each(["x = y", "x += y"])("Assignment expressions (%p)", expression => {
util.testFunction`
let x = "x";
let y = "y";
return ${expression};
`.expectToMatchJsResult();
});
test.each(["x = o.p", "x = a[0]", "x = y = o.p", "x = o.p"])("Assignment expressions using temp (%p)", expression => {
util.testFunction`
let x = "x";
let y = "y";
let o = {p: "o"};
let a = ["a"];
return ${expression};
`.expectToMatchJsResult();
});
test.each(["o.p = x", "a[0] = x", "o.p = a[0]", "o.p = a[0] = x"])(
"Property assignment expressions (%p)",
expression => {
util.testFunction`
let x = "x";
let o = {p: "o"};
let a = ["a"];
return ${expression};
`.expectToMatchJsResult();
}
);
test.each([
"x = t()",
"x = tr()",
"[x[1], x[0]] = t()",
"[x[1], x[0]] = tr()",
"x = [y[1], y[0]]",
"[x[0], x[1]] = [y[1], y[0]]",
])("multi return assignment expressions (%p)", expression => {
util.testFunction`
let x: [string, string] = ["x0", "x1"];
let y: [string, string] = ["y0", "y1"];
function t(): [string, string] { return ["t0", "t1"] };
function tr(): LuaMultiReturn<[string, string]> { return $multi("tr0", "tr1"); };
const r = ${expression};
return \`\${r[0]},\${r[1]}\`
`
.withLanguageExtensions()
.expectToMatchJsResult();
});
test.each([
"++x",
"x++",
"--x",
"x--",
"x += y",
"x -= y",
"x *= y",
"y /= x",
"y %= x",
"y **= x",
"x |= y",
"x &= y",
"x ^= y",
"x <<= y",
"x >>>= y",
"x &&= y",
"x ||= y",
"x ??= y",
])("Operator assignment statements (%p)", statement => {
util.testFunction`
let x = 3;
let y = 6;
${statement};
return { x, y };
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/1277
test("Compound assignment as expression (#1277)", () => {
util.testFunction`
let foo = {
bar: false as any
}
const result = foo.bar ||= true;
return { result, foo };
`.expectToMatchJsResult();
});
test.each([
"++o.p",
"o.p++",
"--o.p",
"o.p--",
"o.p += a[0]",
"o.p -= a[0]",
"o.p *= a[0]",
"a[0] /= o.p",
"a[0] %= o.p",
"a[0] **= o.p",
"o.p |= a[0]",
"o.p &= a[0]",
"o.p ^= a[0]",
"o.p <<= a[0]",
"o.p >>>= a[0]",
])("Operator assignment to simple property statements (%p)", statement => {
util.testFunction`
let o = { p: 3 };
let a = [6];
${statement};
return { o, a };
`.expectToMatchJsResult();
});
test.each([
"++o.p.d",
"o.p.d++",
"--o.p.d",
"o.p.d--",
"o.p.d += a[0][0]",
"o.p.d -= a[0][0]",
"o.p.d *= a[0][0]",
"a[0][0] /= o.p.d",
"a[0][0] %= o.p.d",
"a[0][0] **= o.p.d",
"o.p.d |= a[0][0]",
"o.p.d &= a[0][0]",
"o.p.d ^= a[0][0]",
"o.p.d <<= a[0][0]",
"o.p.d >>>= a[0][0]",
])("Operator assignment to deep property statements (%p)", statement => {
util.testFunction`
let o = { p: { d: 3 } };
let a = [[6,11], [7,13]];
${statement};
return { o, a };
`.expectToMatchJsResult();
});
test.each([
"++of().p",
"of().p++",
"--of().p",
"of().p--",
"of().p += af()[i()]",
"of().p -= af()[i()]",
"of().p *= af()[i()]",
"af()[i()] /= of().p",
"af()[i()] %= of().p",
"af()[i()] **= of().p",
"of().p |= af()[i()]",
"of().p &= af()[i()]",
"of().p ^= af()[i()]",
"of().p <<= af()[i()]",
"of().p >>>= af()[i()]",
])("Operator assignment to complex property statements (%p)", statement => {
util.testFunction`
let o = { p: 3 };
let a = [6];
function of() { return o; }
function af() { return a; }
function i() { return 0; }
${statement};
return { o, a };
`.expectToMatchJsResult();
});
test.each([
"++of().p.d",
"of().p.d++",
"--of().p.d",
"of().p.d--",
"of().p.d += af()[i()][i()]",
"of().p.d -= af()[i()][i()]",
"of().p.d *= af()[i()][i()]",
"af()[i()][i()] /= of().p.d",
"af()[i()][i()] %= of().p.d",
"af()[i()][i()] **= of().p.d",
"of().p.d |= af()[i()][i()]",
"of().p.d &= af()[i()][i()]",
"of().p.d ^= af()[i()][i()]",
"of().p.d <<= af()[i()][i()]",
"of().p.d >>>= af()[i()][i()]",
])("Operator assignment to complex deep property statements (%p)", statement => {
util.testFunction`
let o = { p: { d: 3 } };
let a = [[7, 6], [11, 13]];
function of() { return o; }
function af() { return a; }
let _i = 0;
function i() { return _i++; }
${statement};
return { o, a, _i };
`.expectToMatchJsResult();
});
test.each([
"++x",
"x++",
"--x",
"x--",
"x += y",
"x -= y",
"x *= y",
"y /= x",
"y %= x",
"y **= x",
"x |= y",
"x &= y",
"x ^= y",
"x <<= y",
"x >>>= y",
"x + (y += 7)",
"x + (y += 7)",
"x++ + (y += 7)",
])("Operator assignment expressions (%p)", expression => {
util.testFunction`
let x = 3;
let y = 6;
const r = ${expression};
return { r, x, y };
`.expectToMatchJsResult();
});
test.each([
"++o.p",
"o.p++",
"--o.p",
"o.p--",
"o.p += a[0]",
"o.p -= a[0]",
"o.p *= a[0]",
"a[0] /= o.p",
"a[0] %= o.p",
"a[0] **= o.p",
"o.p |= a[0]",
"o.p &= a[0]",
"o.p ^= a[0]",
"o.p <<= a[0]",
"o.p >>>= a[0]",
"o.p + (a[0] += 7)",
"o.p += (a[0] += 7)",
"o.p++ + (a[0] += 7)",
])("Operator assignment to simple property expressions (%p)", expression => {
util.testFunction`
let o = { p: 3 };
let a = [6];
const r = ${expression};
return { r, o, a };
`.expectToMatchJsResult();
});
test.each([
"++of().p",
"of().p++",
"--of().p",
"of().p--",
"of().p += af()[i()]",
"of().p -= af()[i()]",
"of().p *= af()[i()]",
"af()[i()] /= of().p",
"af()[i()] %= of().p",
"af()[i()] **= of().p",
"of().p |= af()[i()]",
"of().p &= af()[i()]",
"of().p ^= af()[i()]",
"of().p <<= af()[i()]",
"of().p >>>= af()[i()]",
"of().p + (af()[i()] += 7)",
"of().p += (af()[i()] += 7)",
"of().p++ + (af()[i()] += 7)",
])("Operator assignment to complex property expressions (%p)", expression => {
util.testFunction`
let o = { p: 3 };
let a = [6];
function of() { return o; }
function af() { return a; }
function i() { return 0; }
const r = ${expression};
return { r, o, a };
`.expectToMatchJsResult();
});
test("local variable declaration referencing self indirectly", () => {
util.testFunction`
let cb: () => void;
function foo(newCb: () => void) {
cb = newCb;
return "foo";
}
let bar = foo(() => {
bar = "bar";
});
cb();
return bar;
`.expectToMatchJsResult();
});
test("local multiple variable declaration referencing self indirectly", () => {
util.testFunction`
let cb: () => void;
function foo(newCb: () => void) {
cb = newCb;
return ["a", "foo", "c"];
}
let [a, bar, c] = foo(() => {
bar = "bar";
});
cb();
return bar;
`.expectToMatchJsResult();
});
describe.each(["x &&= y", "x ||= y"])("boolean compound assignment (%p)", assignment => {
const booleanCases = [
[false, false],
[false, true],
[true, false],
[true, true],
];
test.each(booleanCases)("matches JS", (x, y) => {
util.testFunction`
let x = ${x};
let y = ${y};
${assignment};
return x;
`.expectToMatchJsResult();
});
});
test.each([undefined, 3])("nullish coalescing compound assignment", initialValue => {
util.testFunction`
let x: number = ${util.formatCode(initialValue)};
x ??= 5;
return x;
`.expectToMatchJsResult();
});
test("nullish coalescing compound assignment lhs false", () => {
util.testFunction`
let x = false;
x ??= true;
return x;
`.expectToMatchJsResult();
});
test("nullish coalescing compound assignment side effect not evaluated", () => {
util.testFunction`
let x = 3;
let y = 10;
x ??= (y += 5);
return [x, y];
`.expectToMatchJsResult();
});
test.each([
{ operator: "||=", initialValue: true },
{ operator: "&&=", initialValue: false },
{ operator: "??=", initialValue: false },
])("compound assignment short-circuits and does not call setter", ({ operator, initialValue }) => {
/*
In JS if the rhs does not affect the resulting value, the setter is NOT called:
* x.y ||= z is translated to x.y || (x.y = z).
* x.y &&= z is translated to x.y && (x.y = z).
* x.y ||= z is translated to x.y !== undefined && (x.y = z).
Test if setter in Lua is called same nr of times as in JS.
*/
util.testModule`
export let setterCalled = 0;
class MyClass {
get prop(): any {
return ${initialValue};
}
set prop(value: any) {
setterCalled++;
}
}
const inst = new MyClass();
inst.prop ${operator} 8;
`.expectToMatchJsResult();
});
test.each([
{ operator: "||=", initialValue: true },
{ operator: "&&=", initialValue: false },
{ operator: "??=", initialValue: false },
])("compound assignment short-circuits and does not call setter as expression", ({ operator, initialValue }) => {
/*
In JS if the rhs does not affect the resulting value, the setter is NOT called:
* x.y ||= z is translated to x.y || (x.y = z).
* x.y &&= z is translated to x.y && (x.y = z).
* x.y ||= z is translated to x.y !== undefined && (x.y = z).
Test if setter in Lua is called same nr of times as in JS.
*/
util.testModule`
export let setterCalled = 0;
class MyClass {
get prop(): any {
return ${initialValue};
}
set prop(value: any) {
setterCalled++;
}
}
const inst = new MyClass();
export const result = (inst.prop ${operator} 8);
`.expectToMatchJsResult();
});
test.each([
{ operator: "+=", initialValue: 3 },
{ operator: "-=", initialValue: 10 },
{ operator: "*=", initialValue: 4 },
{ operator: "/=", initialValue: 20 },
{ operator: "||=", initialValue: false },
{ operator: "&&=", initialValue: true },
{ operator: "??=", initialValue: undefined },
])("compound assignment side effects", ({ operator, initialValue }) => {
// Test if when assigning to something with potential side effects, they are only evaluated once.
util.testFunction`
const obj: { prop: any} = { prop: ${initialValue} };
let objGot = 0;
function getObj() {
objGot++;
return obj;
}
getObj().prop ${operator} 4;
return [obj, objGot];
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/1412
test("invalid assignment to call expression (#1412)", () => {
util.testFunction`
function foo(): number {
return 3;
}
foo() += 4;
`.expectNoTranspileException();
});