test: add missing implementation-plan test targets

tests/binary_test/BUILD.bazel

@@ -24,3 +24,22 @@ sh_test(
     args = ["$(location :hello_ts_bin)", "hello-ts"],
     data = [":hello_ts_bin"],
 )
+
+bun_binary(
+    name = "hello_js_with_data_bin",
+    entry_point = "hello.js",
+    data = ["payload.txt"],
+)
+
+sh_test(
+    name = "bun_binary_data_test",
+    srcs = ["verify_data_shape.sh"],
+    args = [
+        "$(location //internal:bun_binary.bzl)",
+        "$(location //tests/binary_test:BUILD.bazel)",
+    ],
+    data = [
+        "//internal:bun_binary.bzl",
+        "//tests/binary_test:BUILD.bazel",
+    ],
+)

tests/binary_test/payload.txt

@@ -0,0 +1 @@
+hello-from-data

tests/binary_test/verify_data_shape.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+rule_file="$1"
+build_file="$2"
+
+grep -Eq 'files = \[bun_bin, entry_point\] \+ ctx\.files\.data' "${rule_file}"
+grep -Eq 'name = "hello_js_with_data_bin"' "${build_file}"
+grep -Eq 'data = \["payload\.txt"\]' "${build_file}"