test(plugin): pin a composer-normalize fixture and compare its listing

The pinned plugin and its real dependency tree (nine packages, fetched by
commit and verified by tree hash into the git-ignored ext/) install under
both implementations, and the list/help renderings of the plugin-provided
normalize command must match upstream byte for byte. The execution
comparison is written but ignored: NormalizeCommand builds a second,
in-process Composer instance, and the worker's proxy stubs reject native
construction of the classes that path instantiates. Stale comments about
the missing worker-side application are updated to the current facts.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2 files changed, 270 insertions, 0 deletions

diff --git a/crates/shirabe/tests/plugin/fixtures/e2e-normalize/fetch b/crates/shirabe/tests/plugin/fixtures/e2e-normalize/fetch
new file mode 100755
index 00000000..7fb7cd5a
--- /dev/null
+++ b/crates/shirabe/tests/plugin/fixtures/e2e-normalize/fetch
@@ -0,0 +1,42 @@
+#!/bin/sh
+# Fetches the external packages the composer-normalize E2E test runs against, into the
+# git-ignored ext/ directory. Every package is pinned to an immutable upstream commit and the
+# extracted tree is verified by a content hash over all files, so the test stays deterministic
+# without any third-party source entering this repository. Requires network once; the E2E test
+# skips itself while ext/ is absent.
+set -eu
+
+base="$(dirname "$0")/ext"
+
+tree_hash() {
+    (cd "$1" && find . -type f | LC_ALL=C sort | xargs sha256sum | sha256sum | cut -d' ' -f1)
+}
+
+# <dir> <github repo> <commit> <tree hash>
+while read -r dir repo commit hash; do
+    target="$base/$dir"
+    if [ -d "$target" ]; then
+        echo "already fetched: $target"
+        continue
+    fi
+    mkdir -p "$target"
+    curl -fsSL "https://codeload.github.com/$repo/tar.gz/$commit" \
+        | tar -xz -C "$target" --strip-components=1
+    actual="$(tree_hash "$target")"
+    if [ "$actual" != "$hash" ]; then
+        rm -rf "$target"
+        echo "tree hash mismatch for $repo@$commit: got $actual; discarded the fetched tree" >&2
+        exit 1
+    fi
+    echo "fetched: $target"
+done <<'EOF'
+composer-normalize-2.52.0 ergebnis/composer-normalize 988f83f5e51a42cdd2337e5fcd935432f8dfa33c 5259a0371a2b571fab3018c8a6a5929883a669f516e1e8a3fb1cfb37e0803e2c
+json-1.6.0 ergebnis/json 7b56d2b5d9e897e75b43e2e753075a0904c921b1 faa07a09e62d6a47582f011744fae2d0f220ccdda157465d31b11b3c095c3605
+json-normalizer-4.10.1 ergebnis/json-normalizer 77961faf2c651c3f05977b53c6c68e8434febf62 edea5b84656b1ae172ca4e92ebe481ff3c22828d3637b36c76e65223c38e9dce
+json-pointer-3.8.0 ergebnis/json-pointer b58c3c468a7ff109fdf9a255f17de29ecbe5276c 5395f59f684babf62a33d721ef8ab49eaba3d1280786081b45c49c29fdea1562
+json-printer-3.8.1 ergebnis/json-printer 211d73fc7ec6daf98568ee6ed6e6d133dee8503e 72d8e6ca1a168229bb2a50524a00d0c0a3c69be5e65731d177b6b563503e6b9a
+json-schema-validator-4.5.1 ergebnis/json-schema-validator b739527a480a9e3651360ad351ea77e7e9019df2 a176d190b6517b0380edfe13e526289864849c8b1788dee19123560658fc0be4
+json-schema-6.10.0 jsonrainbow/json-schema 8b1308a9d7bdbdb20ce87ef920f82b4564bb2d33 8b6b7931f9072aabf599927cf92ecc171f37e6516c4075172b60a45baa276380
+php-enum-4.7.2 marc-mabe/php-enum bb426fcdd65c60fb3638ef741e8782508fda7eef 7bb6a4923625cd6353b95534b322f951acf0aef055054cffd99e97dcbf1778b5
+diff-1.3.0 localheinz/diff 33bd840935970cda6691c23fc7d94ae764c0734c 283c8104b38fc8428e0819d30ab5e94f4e8284293d79b994bba4fbf0e05ca86f
+EOF
diff --git a/crates/shirabe/tests/plugin/fixtures/e2e-normalize/project/composer.json b/crates/shirabe/tests/plugin/fixtures/e2e-normalize/project/composer.json
new file mode 100644
index 00000000..9af30ddb
--- /dev/null
+++ b/crates/shirabe/tests/plugin/fixtures/e2e-normalize/project/composer.json
@@ -0,0 +1,228 @@
+{
+    "description": "E2E fixture project: install and run ergebnis/composer-normalize. The top-level keys are deliberately out of schema order so the normalize run has something to do.",
+    "require": {
+        "ergebnis/composer-normalize": "2.52.0"
+    },
+    "name": "shirabe/e2e-composer-normalize",
+    "config": {
+        "allow-plugins": {
+            "ergebnis/composer-normalize": true
+        }
+    },
+    "repositories": [
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/composer-normalize",
+                "version": "2.52.0",
+                "type": "composer-plugin",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Composer\\Normalize\\": "src/"
+                    }
+                },
+                "require": {
+                    "ext-json": "*",
+                    "composer-plugin-api": "^2.0.0",
+                    "ergebnis/json": "^1.4.0",
+                    "ergebnis/json-normalizer": "^4.9.0",
+                    "ergebnis/json-printer": "^3.7.0",
+                    "justinrainbow/json-schema": "^5.2.12 || ^6.0.0",
+                    "localheinz/diff": "^1.3.0"
+                },
+                "extra": {
+                    "class": "Ergebnis\\Composer\\Normalize\\NormalizePlugin"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/composer-normalize-2.52.0"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/json",
+                "version": "1.6.0",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Json\\": "src/"
+                    }
+                },
+                "require": {
+                    "ext-json": "*"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-1.6.0"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/json-normalizer",
+                "version": "4.10.1",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Json\\Normalizer\\": "src/"
+                    }
+                },
+                "require": {
+                    "ext-json": "*",
+                    "ergebnis/json": "^1.2.0",
+                    "ergebnis/json-pointer": "^3.4.0",
+                    "ergebnis/json-printer": "^3.5.0",
+                    "ergebnis/json-schema-validator": "^4.2.0",
+                    "justinrainbow/json-schema": "^5.2.12 || ^6.0.0"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-normalizer-4.10.1"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/json-pointer",
+                "version": "3.8.0",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Json\\Pointer\\": "src/"
+                    }
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-pointer-3.8.0"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/json-printer",
+                "version": "3.8.1",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Json\\Printer\\": "src/"
+                    }
+                },
+                "require": {
+                    "ext-json": "*",
+                    "ext-mbstring": "*"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-printer-3.8.1"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "ergebnis/json-schema-validator",
+                "version": "4.5.1",
+                "autoload": {
+                    "psr-4": {
+                        "Ergebnis\\Json\\SchemaValidator\\": "src/"
+                    }
+                },
+                "require": {
+                    "ext-json": "*",
+                    "ergebnis/json": "^1.2.0",
+                    "ergebnis/json-pointer": "^3.4.0",
+                    "justinrainbow/json-schema": "^5.2.12 || ^6.0.0"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-schema-validator-4.5.1"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "justinrainbow/json-schema",
+                "version": "6.10.0",
+                "autoload": {
+                    "psr-4": {
+                        "JsonSchema\\": "src/JsonSchema/"
+                    }
+                },
+                "require": {
+                    "marc-mabe/php-enum": "^4.4"
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/json-schema-6.10.0"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "marc-mabe/php-enum",
+                "version": "4.7.2",
+                "autoload": {
+                    "psr-4": {
+                        "MabeEnum\\": "src/"
+                    },
+                    "classmap": [
+                        "stubs/Stringable.php"
+                    ]
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/php-enum-4.7.2"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "type": "package",
+            "package": {
+                "name": "localheinz/diff",
+                "version": "1.3.0",
+                "autoload": {
+                    "classmap": [
+                        "src/"
+                    ]
+                },
+                "dist": {
+                    "type": "path",
+                    "url": "../ext/diff-1.3.0"
+                },
+                "transport-options": {
+                    "symlink": false
+                }
+            }
+        },
+        {
+            "packagist.org": false
+        }
+    ]
+}