From e1c799c5ec4274a19b4ab26bd7a0ddab8f080574 Mon Sep 17 00:00:00 2001
From: Jonathan Watson <jonathan.watson@arm.com>
Date: Wed, 26 Feb 2025 09:46:15 +0000
Subject: [PATCH] test(emacs): add version and emacs test

---
 e2e/binary/emacs/BUILD.bazel | 31 +++++++++++++++++++++++++------
 e2e/binary/emacs/emacs.py    | 14 ++++++++++++++
 2 files changed, 39 insertions(+), 6 deletions(-)
 create mode 100644 e2e/binary/emacs/emacs.py

diff --git a/e2e/binary/emacs/BUILD.bazel b/e2e/binary/emacs/BUILD.bazel
index 81af26c7..c4582ce7 100644
--- a/e2e/binary/emacs/BUILD.bazel
+++ b/e2e/binary/emacs/BUILD.bazel
@@ -1,11 +1,30 @@
-load("@bazel_skylib//rules:build_test.bzl", "build_test")
+load("@rules_python_pytest//python_pytest:defs.bzl", "py_pytest_test")
+load("@bazel_skylib//rules:native_binary.bzl", "native_test")
 
-# TODO: write an _actual_ test for `emacs`
+py_pytest_test(
+    name = "pytest",
+    size = "small",
+    srcs = ["emacs.py"],
+    data = [
+        "@ape//ape:emacs",
+    ],
+    deps = [
+        "//binary:pytest",
+    ],
+)
 
-build_test(
-    name = "emacs",
+native_test(
+    name = "version",
     size = "small",
-    tags = ["stub"],
-    targets = ["@ape//ape:emacs"],
+    src = "@ape//ape:emacs",
+    args = ["--version"],
+)
+
+test_suite(
+    name = "emacs",
+    tests = [
+        "pytest",
+        "version",
+    ],
     visibility = ["//:__subpackages__"],
 )
diff --git a/e2e/binary/emacs/emacs.py b/e2e/binary/emacs/emacs.py
new file mode 100644
index 00000000..1877efb8
--- /dev/null
+++ b/e2e/binary/emacs/emacs.py
@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from pathlib import Path
+from subprocess import run, PIPE
+
+from binary import Diff, Relative, Tool
+
+
+def test_emacs(tool: Tool, relative: Relative, tmp_path: Path) -> None:
+    binary = tool("emacs")
+
+    cmd = (binary, "--batch", "--eval=(prin1 \"Hello, world!\")")
+    result = run(cmd, check=True, timeout=30, capture_output=True, text=True)
+    assert "\"Hello, world!\"" == result.stdout
-- 
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