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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
import mapExpressionBindings from "../mapBindings";
import { parseConsoleScript } from "../utils/ast";
import cases from "jest-in-case";
const prettier = require("prettier");
function format(code) {
return prettier.format(code, { semi: false, parser: "babel" });
}
function excludedTest({ expression, bindings = [] }) {
const safeExpression = mapExpressionBindings(
expression,
parseConsoleScript(expression),
bindings
);
expect(format(safeExpression)).toEqual(format(expression));
}
function includedTest({ expression, newExpression, bindings }) {
const safeExpression = mapExpressionBindings(
expression,
parseConsoleScript(expression),
bindings
);
expect(format(safeExpression)).toEqual(format(newExpression));
}
describe("mapExpressionBindings", () => {
cases("included cases", includedTest, [
{
name: "single declaration",
expression: "const a = 2; let b = 3; var c = 4;",
newExpression: "self.a = 2; self.b = 3; self.c = 4;",
},
{
name: "multiple declarations",
expression: "const a = 2, b = 3",
newExpression: "self.a = 2; self.b = 3",
},
{
name: "declaration with separate assignment",
expression: "let a; a = 2;",
newExpression: "self.a = void 0; self.a = 2;",
},
{
name: "multiple declarations with no assignment",
expression: "let a = 2, b;",
newExpression: "self.a = 2; self.b = void 0;",
},
{
name: "local bindings become assignments",
bindings: ["a"],
expression: "var a = 2;",
newExpression: "a = 2;",
},
{
name: "assignments",
expression: "a = 2;",
newExpression: "self.a = 2;",
},
{
name: "assignments with +=",
expression: "a += 2;",
newExpression: "self.a += 2;",
},
{
name: "destructuring (objects)",
expression: "const { a } = {}; ",
newExpression: "({ a: self.a } = {})",
},
{
name: "destructuring (arrays)",
expression: " var [a, ...foo] = [];",
newExpression: "([self.a, ...self.foo] = [])",
},
{
name: "destructuring (declarations)",
expression: "var {d,e} = {}, {f} = {}; ",
newExpression: `({ d: self.d, e: self.e } = {});
({ f: self.f } = {})
`,
},
{
name: "destructuring & declaration",
expression: "const { a } = {}; var b = 3",
newExpression: `({ a: self.a } = {});
self.b = 3
`,
},
{
name: "destructuring assignment",
expression: "[a] = [3]",
newExpression: "[self.a] = [3]",
},
{
name: "destructuring assignment (declarations)",
expression: "[a] = [3]; var b = 4",
newExpression: "[self.a] = [3];\n self.b = 4",
},
]);
cases("excluded cases", excludedTest, [
{ name: "local variables", expression: "function a() { var b = 2}" },
{ name: "functions", expression: "function a() {}" },
{ name: "classes", expression: "class a {}" },
{ name: "with", expression: "with (obj) {var a = 2;}" },
{
name: "with & declaration",
expression: "with (obj) {var a = 2;}; ; var b = 3",
},
{
name: "hoisting",
expression: "{ const h = 3; }",
},
{
name: "assignments",
bindings: ["a"],
expression: "a = 2;",
},
{
name: "identifier",
expression: "a",
},
]);
cases("cases that we should map in the future", excludedTest, [
{ name: "blocks (IF)", expression: "if (true) { var a = 3; }" },
{
name: "hoisting",
expression: "{ var g = 5; }",
},
{
name: "for loops bindings",
expression: "for (let foo = 4; false;){}",
},
]);
cases("cases that we shouldn't map in the future", includedTest, [
{
name: "window properties",
expression: "var innerHeight = 3; var location = 5;",
newExpression: "self.innerHeight = 3; self.location = 5;",
},
{
name: "self declaration",
expression: "var self = 3",
newExpression: "self.self = 3",
},
{
name: "self assignment",
expression: "self = 3",
newExpression: "self.self = 3",
},
]);
});
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