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denoland-deno/cli/tests/unit_node/module_test.ts
Marvin Hagemeister 8608105208
fix(node): duplicate node_module suffixes (#19222)
Noticed that we're checking more module paths than necessary. In
particular the module path array contains a couple of entries with a
duplicated `node_modules/node_modules` suffix.

```js
[
    // ... more entries before here, where some also contain duplicate suffixes
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules/.deno/node_modules",
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules/node_modules", // <-- duplicate suffix
    "/Users/marvinhagemeister/dev/preact-render-to-string/node_modules",
    "/Users/marvinhagemeister/dev/node_modules",
    "/Users/marvinhagemeister/node_modules",
    "/Users/node_modules",
    "/node_modules",
    "/node_modules"  // <-- duplicate entry
]
```

This was caused by a misunderstanding in how Rust's
[`Path::ends_with()`](https://doc.rust-lang.org/std/path/struct.Path.html#method.ends_with)
works. It's designed to match on whole path segments and the suffix
`/node_modules` is not that, except for the root entry. This meant that
our check for if the path already ended with `node_module` always
returned `false`. Removing the leading slash fixes that.

While we're at it, we can remove the last condition where we explicitly
added the root `/node_modules` entry since the while loop prior to that
takes care of it already.
2023-05-23 12:46:14 +02:00

60 lines
1.9 KiB
TypeScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { Module } from "node:module";
import {
assert,
assertEquals,
} from "../../../test_util/std/testing/asserts.ts";
import process from "node:process";
import * as path from "node:path";
Deno.test("[node/module _preloadModules] has internal require hook", () => {
// Check if it's there
// deno-lint-ignore no-explicit-any
(Module as any)._preloadModules([
"./cli/tests/unit_node/testdata/add_global_property.js",
]);
// deno-lint-ignore no-explicit-any
assertEquals((globalThis as any).foo, "Hello");
});
Deno.test("[node/module runMain] loads module using the current process.argv", () => {
process.argv = [
process.argv[0],
"./cli/tests/unit_node/testdata/add_global_property_run_main.js",
];
// deno-lint-ignore no-explicit-any
(Module as any).runMain();
// deno-lint-ignore no-explicit-any
assertEquals((globalThis as any).calledViaRunMain, true);
});
Deno.test("[node/module _nodeModulePaths] prevents duplicate /node_modules/node_modules suffix", () => {
// deno-lint-ignore no-explicit-any
const actual: string[] = (Module as any)._nodeModulePaths(
path.join(process.cwd(), "testdata", "node_modules", "foo"),
);
assert(
!actual.some((dir) => /node_modules[/\\]node_modules/g.test(dir)),
"Duplicate 'node_modules/node_modules' suffix found",
);
});
Deno.test("[node/module _nodeModulePaths] prevents duplicate root /node_modules", () => {
// deno-lint-ignore no-explicit-any
const actual: string[] = (Module as any)._nodeModulePaths(
path.join(process.cwd(), "testdata", "node_modules", "foo"),
);
assert(
new Set(actual).size === actual.length,
"Duplicate path entries found",
);
const root = path.parse(actual[0]).root;
assert(
actual.includes(path.join(root, "node_modules")),
"Missing root 'node_modules' directory",
);
});