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hoisting.spec.ts
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260 lines (236 loc) · 6.88 KB
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import * as ts from "typescript";
import * as util from "../util";
test.each(["let", "const"])("Let/Const Hoisting (%p)", varType => {
util.testFunction`
let bar: string;
function setBar() { bar = foo; }
${varType} foo = "foo";
setBar();
return foo;
`.expectToMatchJsResult();
});
test.each(["let", "const"])("Exported Let/Const Hoisting (%p)", varType => {
util.testModule`
let bar: string;
function setBar() { bar = foo; }
export ${varType} foo = "foo";
setBar();
`.expectToMatchJsResult();
});
test("Global Function Hoisting", () => {
util.testFunction`
const foo = bar();
function bar() { return "bar"; }
return foo;
`.expectToMatchJsResult();
});
test("Local Function Hoisting", () => {
util.testModule`
export const foo = bar();
function bar() { return "bar"; }
`.expectToMatchJsResult();
});
test("Exported Function Hoisting", () => {
util.testModule`
const foo = bar();
export function bar() { return "bar"; }
export const baz = foo;
`
.setReturnExport("baz")
.expectToMatchJsResult();
});
test("Namespace Function Hoisting", () => {
util.testFunction`
return foo;
`
.setTsHeader(
`
let foo: string;
namespace NS {
foo = bar();
function bar() { return "bar"; }
}
`
)
.expectToMatchJsResult();
});
test("Exported Namespace Function Hoisting", () => {
util.testFunction("return foo;")
.setTsHeader(
`
let foo: string;
namespace NS {
foo = bar();
export function bar() { return "bar"; }
}
`
)
.expectToMatchJsResult();
});
test.each(["let", "const"])("Hoisting in Non-Function Scope (%p)", varType => {
util.testFunction`
function foo() {
${varType} bar = "bar";
for (let i = 0; i < 1; ++i) {
${varType} bar = "foo";
}
return bar;
}
return foo();
`.expectToMatchJsResult();
});
test("Hoisting due to reference from hoisted function", () => {
util.testFunction`
const foo = "foo";
const result = bar();
function bar() {
return foo;
}
return result;
`.expectToMatchJsResult();
});
test("Hoisting with synthetic source file node", () => {
util.testModule`
export const foo = bar();
function bar() { return "bar"; }
`
.setCustomTransformers({
before: [
() => sourceFile =>
ts.factory.updateSourceFile(
sourceFile,
[ts.factory.createNotEmittedStatement(undefined!), ...sourceFile.statements],
sourceFile.isDeclarationFile,
sourceFile.referencedFiles,
sourceFile.typeReferenceDirectives,
sourceFile.hasNoDefaultLib,
sourceFile.libReferenceDirectives
),
],
})
.expectToMatchJsResult();
});
test("Namespace Hoisting", () => {
util.testModule`
function bar() {
return NS.foo;
}
namespace NS {
export let foo = "foo";
}
export const foo = bar();
`.expectToMatchJsResult();
});
test("Exported Namespace Hoisting", () => {
util.testModule`
function bar() {
return NS.foo;
}
export namespace NS {
export let foo = "foo";
}
export const foo = bar();
`.expectToMatchJsResult();
});
test("Nested Namespace Hoisting", () => {
util.testModule`
const Inner = 0;
namespace Outer {
export function bar() {
return Inner.foo;
}
namespace Inner {
export const foo = "foo";
}
}
export const foo = Outer.bar();
export { Inner };
`.expectToMatchJsResult();
});
test("Class Hoisting", () => {
util.testModule`
function makeFoo() {
return new Foo();
}
class Foo {
public bar = "foo";
}
export const foo = makeFoo().bar;
`.expectToMatchJsResult();
});
test("Enum Hoisting", () => {
util.testModule`
function bar() {
return E.A;
}
enum E {
A = "foo"
}
export const foo = bar();
`.expectToHaveNoDiagnostics();
});
test("Import hoisting (named)", () => {
// TODO cant be tested with expectToEqualJSResult because of
// the scuffed module setup in TestBuilder.executeJs (module hoisting is not possible)
// should be updated once vm.module becomes stable
util.testModule`
export const result = foo;
import { foo } from "./module";
`
.addExtraFile("module.ts", "export const foo = true;")
.expectToEqual({ result: true });
});
test("Import hoisting (namespace)", () => {
// TODO cant be tested with expectToEqualJSresult because of
// the scuffed module setup in TestBuilder.executeJs (module hoisting is not possible)
// should be updated once vm.module becomes stable
util.testModule`
export const result = m.foo;
import * as m from "./module";
`
.addExtraFile("module.ts", "export const foo = true;")
.expectToEqual({ result: true });
});
test("Import hoisting (side-effect)", () => {
// TODO cant be tested with expectToEqualJSResult because of
// the scuffed module setup in TestBuilder.executeJs (module hoisting is not possible)
// should be updated once vm.module becomes stable
util.testModule`
export const result = (globalThis as any).result;
import "./module";
`
.addExtraFile("module.ts", "(globalThis as any).result = true; export {};")
.expectToEqual({ result: true });
});
test("Import hoisted before function", () => {
// Can't use expectToMatchJsResult because above is not valid TS/JS
util.testModule`
export let result: any;
baz();
function baz() {
result = foo;
}
import { foo } from "./module";
`
.addExtraFile("module.ts", "export const foo = true;")
.expectToEqual({ result: true });
});
test("Hoisting Shorthand Property", () => {
util.testFunction`
function foo() {
return { bar }.bar;
}
let bar = "foobar";
return foo();
`.expectToMatchJsResult();
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/944
test("Hoisting variable without initializer", () => {
util.testFunction`
function foo() {
return x;
}
let x: number;
return foo();
`.expectToMatchJsResult();
});