Add a copy of bashunit.

Needed for tests of android_sdk_repository.

Part of #76.

PiperOrigin-RevId: 557560436
Change-Id: I1c904b2e3a3136819b3d6b3bc6ee49193aeebbce

test/bashunit/BUILD

@@ -0,0 +1,43 @@
+load("@rules_python//python:py_test.bzl", "py_test")
+
+package(
+    default_applicable_licenses = ["//:license"],
+    default_visibility = [
+        "//test:__subpackages__",
+    ],
+)
+
+licenses(["notice"])
+
+exports_files(
+    ["unittest.bash"],
+)
+
+sh_library(
+    name = "bashunit",
+    testonly = True,
+    srcs = [
+        "unittest.bash",
+        "unittest_utils.sh",
+    ],
+)
+
+# Test bashunit with python to avoid recursion.
+py_test(
+    name = "bashunit_test",
+    size = "medium",
+    srcs = ["unittest_test.py"],
+    data = [
+        ":bashunit",
+        # This test relies on writing shell scripts that use bash runfiles
+        # to load the actual copy of unittest.bash being tested.
+        "@bazel_tools//tools/bash/runfiles",
+    ],
+    main = "unittest_test.py",
+    python_version = "PY3",
+    srcs_version = "PY3",
+    tags = [
+        "manual",  # TODO(b/266084774): Re-enable this.
+        "no_windows",  # test runs bash scripts in a subprocess
+    ],
+)