test: add npm_package(root_paths) test (#496)

BUILD.bazel

@@ -23,6 +23,17 @@ npm_link_package(
     src = "//examples/npm_package/packages/pkg_b",
 )
 
+# Manually linked pkg-c with additional use cases.
+npm_link_package(
+    name = "node_modules/@mycorp/pkg-c1",
+    src = "//examples/npm_package/packages/pkg_c:pkg_c1",
+)
+
+npm_link_package(
+    name = "node_modules/@mycorp/pkg-c2",
+    src = "//examples/npm_package/packages/pkg_c:pkg_c2",
+)
+
 gazelle_binary(
     name = "gazelle_bin",
     languages = ["@bazel_skylib//gazelle/bzl"],

examples/js_binary/BUILD.bazel

@@ -502,3 +502,93 @@ js_test(
     entry_point = "npm_version_test.js",
     include_npm = True,
 )
+
+
+####################################################
+# Use case 13
+# npm_package() with root_paths[], linked and consumed
+# https://github.com/aspect-build/rules_js/issues/471
+
+write_file(
+    name = "write13",
+    out = "case13.js",
+    content = [
+        """require('fs').writeFileSync(
+            process.argv[2],
+            JSON.stringify(require(process.argv[3]))
+        )""",
+    ],
+)
+
+js_binary(
+    name = "bin13",
+    data = [
+        "//:node_modules/@mycorp/pkg-c1",
+        "//:node_modules/@mycorp/pkg-c2",
+    ],
+    entry_point = "case13.js",
+)
+
+write_file(
+    name = "expected13-1-out",
+    out = "expected13-1-out.json",
+    content = [
+        """{"name":"c1"}""",
+    ],
+    visibility = ["//visibility:private"],
+)
+
+js_run_binary(
+    name = "run13-1",
+    args = [
+        "out13-dist-1/out13-1",
+        "@mycorp/pkg-c1",
+    ],
+    chdir = package_name(),
+    out_dirs = ["out13-dist-1"],
+    tool = ":bin13",
+)
+
+directory_path(
+    name = "out13-1",
+    directory = ":run13-1",
+    path = "out13-1",
+)
+
+diff_test(
+    name = "test13-1",
+    file1 = ":expected13-1-out.json",
+    file2 = ":out13-1",
+)
+
+write_file(
+    name = "expected13-2-out",
+    out = "expected13-2-out.json",
+    content = [
+        """{"name":"c2"}""",
+    ],
+    visibility = ["//visibility:private"],
+)
+
+js_run_binary(
+    name = "run13-2",
+    args = [
+        "out13-dist-2/out13-2",
+        "@mycorp/pkg-c2",
+    ],
+    chdir = package_name(),
+    out_dirs = ["out13-dist-2"],
+    tool = ":bin13",
+)
+
+directory_path(
+    name = "out13-2",
+    directory = ":run13-2",
+    path = "out13-2",
+)
+
+diff_test(
+    name = "test13-2",
+    file1 = ":expected13-2-out.json",
+    file2 = ":out13-2",
+)

examples/npm_package/packages/pkg_c/BUILD.bazel

@@ -0,0 +1,37 @@
+load("@aspect_rules_js//npm:defs.bzl", "npm_package")
+
+# The terminal npm_package target for this package. This target is linked
+# manually in the root of the pnpm workspace with `npm_link_package`.
+# This npm_package uses root_paths[] to pull some files into the root package
+# to test cases such as https://github.com/aspect-build/rules_js/issues/471.
+npm_package(
+    name = "pkg_c1",
+    srcs = [
+        "data1/package.json",
+        "data1/pkg-c.json",
+        "src/index.js",
+    ],
+    package = "@mycorp/pkg-c1",
+    root_paths = [
+        package_name(),
+        package_name() + "/src",
+        package_name() + "/data1",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+npm_package(
+    name = "pkg_c2",
+    srcs = [
+        "data2/package.json",
+        "data2/pkg-c.json",
+        "src/index.js",
+    ],
+    package = "@mycorp/pkg-c2",
+    root_paths = [
+        package_name(),
+        package_name() + "/src",
+        package_name() + "/data2",
+    ],
+    visibility = ["//visibility:public"],
+)

examples/npm_package/packages/pkg_c/README.md

@@ -0,0 +1,4 @@
+# @mycorp/pkg-c* 1+2* packages
+
+'@mycorp/pkg-c1' and '@mycorp/pkg-c2' are an example of packages using different
+configurations of `npm_package(root_paths)` to produce different packages.

examples/npm_package/packages/pkg_c/data1/package.json

@@ -0,0 +1,5 @@
+{
+    "name": "@mycorp/pkg-c1",
+    "private": true,
+    "dependencies": {}
+}

examples/npm_package/packages/pkg_c/data1/pkg-c.json

@@ -0,0 +1,3 @@
+{
+    "name": "c1"
+}

examples/npm_package/packages/pkg_c/data2/package.json

@@ -0,0 +1,5 @@
+{
+    "name": "@mycorp/pkg-c2",
+    "private": true,
+    "dependencies": {}
+}

examples/npm_package/packages/pkg_c/data2/pkg-c.json

@@ -0,0 +1,3 @@
+{
+    "name": "c2"
+}

examples/npm_package/packages/pkg_c/src/index.js

@@ -0,0 +1 @@
+module.exports = require('./pkg-c.json')