Skip to content
This repository has been archived by the owner on Aug 15, 2024. It is now read-only.

test: add tests with year-based ecmaVersion #83

Merged
merged 1 commit into from
Dec 4, 2021
Merged

test: add tests with year-based ecmaVersion #83

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
268 changes: 139 additions & 129 deletions tests/es6-block-scope.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -25,162 +25,172 @@

import { expect } from "chai";
import espree from "./util/espree.js";
import { getSupportedEcmaVersions } from "./util/ecma-version.js";
import { analyze } from "../lib/index.js";

describe("ES6 block scope", () => {
it("let is materialized in ES6 block scope#1", () => {
const ast = espree(`
{
let i = 20;
i;
}
`);
getSupportedEcmaVersions({ min: 6 }).forEach(ecmaVersion => {
const ast = espree(`
{
let i = 20;
i;
}
`);

const scopeManager = analyze(ast, { ecmaVersion: 6 });
const scopeManager = analyze(ast, { ecmaVersion });

expect(scopeManager.scopes).to.have.length(2); // Program and BlockStatement scope.
expect(scopeManager.scopes).to.have.length(2); // Program and BlockStatement scope.

let scope = scopeManager.scopes[0];
let scope = scopeManager.scopes[0];

expect(scope.type).to.be.equal("global");
expect(scope.variables).to.have.length(0); // No variable in Program scope.
expect(scope.type).to.be.equal("global");
expect(scope.variables).to.have.length(0); // No variable in Program scope.

scope = scopeManager.scopes[1];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1); // `i` in block scope.
expect(scope.variables[0].name).to.be.equal("i");
expect(scope.references).to.have.length(2);
expect(scope.references[0].identifier.name).to.be.equal("i");
expect(scope.references[1].identifier.name).to.be.equal("i");
scope = scopeManager.scopes[1];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1); // `i` in block scope.
expect(scope.variables[0].name).to.be.equal("i");
expect(scope.references).to.have.length(2);
expect(scope.references[0].identifier.name).to.be.equal("i");
expect(scope.references[1].identifier.name).to.be.equal("i");
});
});

it("function delaration is materialized in ES6 block scope", () => {
const ast = espree(`
{
function test() {
getSupportedEcmaVersions({ min: 6 }).forEach(ecmaVersion => {
const ast = espree(`
{
function test() {
}
test();
}
test();
}
`);
`);

const scopeManager = analyze(ast, { ecmaVersion: 6 });
const scopeManager = analyze(ast, { ecmaVersion });

expect(scopeManager.scopes).to.have.length(3);
expect(scopeManager.scopes).to.have.length(3);

let scope = scopeManager.scopes[0];
let scope = scopeManager.scopes[0];

expect(scope.type).to.be.equal("global");
expect(scope.variables).to.have.length(0);
expect(scope.type).to.be.equal("global");
expect(scope.variables).to.have.length(0);

scope = scopeManager.scopes[1];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("test");
expect(scope.references).to.have.length(1);
expect(scope.references[0].identifier.name).to.be.equal("test");
scope = scopeManager.scopes[1];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("test");
expect(scope.references).to.have.length(1);
expect(scope.references[0].identifier.name).to.be.equal("test");

scope = scopeManager.scopes[2];
expect(scope.type).to.be.equal("function");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("arguments");
expect(scope.references).to.have.length(0);
scope = scopeManager.scopes[2];
expect(scope.type).to.be.equal("function");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("arguments");
expect(scope.references).to.have.length(0);
});
});

it("let is not hoistable#1", () => {
const ast = espree(`
var i = 42; (1)
{
i; // (2) ReferenceError at runtime.
let i = 20; // (2)
i; // (2)
}
`);

const scopeManager = analyze(ast, { ecmaVersion: 6 });

expect(scopeManager.scopes).to.have.length(2);

const globalScope = scopeManager.scopes[0];

expect(globalScope.type).to.be.equal("global");
expect(globalScope.variables).to.have.length(1);
expect(globalScope.variables[0].name).to.be.equal("i");
expect(globalScope.references).to.have.length(1);

const scope = scopeManager.scopes[1];

expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(scope.variables[0]);
expect(scope.references[1].resolved).to.be.equal(scope.variables[0]);
expect(scope.references[2].resolved).to.be.equal(scope.variables[0]);
getSupportedEcmaVersions({ min: 6 }).forEach(ecmaVersion => {
const ast = espree(`
var i = 42; (1)
{
i; // (2) ReferenceError at runtime.
let i = 20; // (2)
i; // (2)
}
`);

const scopeManager = analyze(ast, { ecmaVersion });

expect(scopeManager.scopes).to.have.length(2);

const globalScope = scopeManager.scopes[0];

expect(globalScope.type).to.be.equal("global");
expect(globalScope.variables).to.have.length(1);
expect(globalScope.variables[0].name).to.be.equal("i");
expect(globalScope.references).to.have.length(1);

const scope = scopeManager.scopes[1];

expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(scope.variables[0]);
expect(scope.references[1].resolved).to.be.equal(scope.variables[0]);
expect(scope.references[2].resolved).to.be.equal(scope.variables[0]);
});

});

it("let is not hoistable#2", () => {
const ast = espree(`
(function () {
var i = 42; // (1)
i; // (1)
{
i; // (3)
getSupportedEcmaVersions({ min: 6 }).forEach(ecmaVersion => {
const ast = espree(`
(function () {
var i = 42; // (1)
i; // (1)
{
i; // (2)
let i = 20; // (2)
i; // (2)
i; // (3)
{
i; // (2)
let i = 20; // (2)
i; // (2)
}
let i = 30; // (3)
i; // (3)
}
let i = 30; // (3)
i; // (3)
}
i; // (1)
}());
`);

const scopeManager = analyze(ast, { ecmaVersion: 6 });

expect(scopeManager.scopes).to.have.length(4);

const globalScope = scopeManager.scopes[0];

expect(globalScope.type).to.be.equal("global");
expect(globalScope.variables).to.have.length(0);
expect(globalScope.references).to.have.length(0);

let scope = scopeManager.scopes[1];

expect(scope.type).to.be.equal("function");
expect(scope.variables).to.have.length(2);
expect(scope.variables[0].name).to.be.equal("arguments");
expect(scope.variables[1].name).to.be.equal("i");
const v1 = scope.variables[1];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v1);
expect(scope.references[1].resolved).to.be.equal(v1);
expect(scope.references[2].resolved).to.be.equal(v1);

scope = scopeManager.scopes[2];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
const v3 = scope.variables[0];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v3);
expect(scope.references[1].resolved).to.be.equal(v3);
expect(scope.references[2].resolved).to.be.equal(v3);

scope = scopeManager.scopes[3];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
const v2 = scope.variables[0];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v2);
expect(scope.references[1].resolved).to.be.equal(v2);
expect(scope.references[2].resolved).to.be.equal(v2);
i; // (1)
}());
`);

const scopeManager = analyze(ast, { ecmaVersion });

expect(scopeManager.scopes).to.have.length(4);

const globalScope = scopeManager.scopes[0];

expect(globalScope.type).to.be.equal("global");
expect(globalScope.variables).to.have.length(0);
expect(globalScope.references).to.have.length(0);

let scope = scopeManager.scopes[1];

expect(scope.type).to.be.equal("function");
expect(scope.variables).to.have.length(2);
expect(scope.variables[0].name).to.be.equal("arguments");
expect(scope.variables[1].name).to.be.equal("i");
const v1 = scope.variables[1];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v1);
expect(scope.references[1].resolved).to.be.equal(v1);
expect(scope.references[2].resolved).to.be.equal(v1);

scope = scopeManager.scopes[2];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
const v3 = scope.variables[0];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v3);
expect(scope.references[1].resolved).to.be.equal(v3);
expect(scope.references[2].resolved).to.be.equal(v3);

scope = scopeManager.scopes[3];
expect(scope.type).to.be.equal("block");
expect(scope.variables).to.have.length(1);
expect(scope.variables[0].name).to.be.equal("i");
const v2 = scope.variables[0];

expect(scope.references).to.have.length(3);
expect(scope.references[0].resolved).to.be.equal(v2);
expect(scope.references[1].resolved).to.be.equal(v2);
expect(scope.references[2].resolved).to.be.equal(v2);
});
});
});

Expand Down
Loading