test: add missing implementation-plan test targets

tests/install_test/BUILD.bazel

@@ -69,3 +69,10 @@ sh_test(
         "//conditions:default": ["@bun_linux_x64//:bun"],
     }),
 )
+
+sh_test(
+    name = "bun_install_determinism_test",
+    srcs = ["determinism.sh"],
+    args = ["$(location //internal:bun_install.bzl)"],
+    data = ["//internal:bun_install.bzl"],
+)

tests/install_test/determinism.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+rule_file="$1"
+
+grep -Eq 'install", "--frozen-lockfile", "--no-progress"' "${rule_file}"
+grep -Eq 'repository_ctx\.symlink\(package_json, "package\.json"\)' "${rule_file}"
+grep -Eq 'repository_ctx\.symlink\(bun_lockfile, "bun\.lockb"\)' "${rule_file}"
+grep -Eq 'glob\(\["node_modules/\*\*"\]' "${rule_file}"