1 files changed, 139 insertions, 0 deletions
diff --git a/tests/languages/ruby_test.py b/tests/languages/ruby_test.py
new file mode 100644
index 0000000..6397a43
--- /dev/null
+++ b/tests/languages/ruby_test.py
@@ -0,0 +1,139 @@
+from __future__ import annotations
+
+import tarfile
+from unittest import mock
+
+import pytest
+
+import pre_commit.constants as C
+from pre_commit import parse_shebang
+from pre_commit.envcontext import envcontext
+from pre_commit.languages import ruby
+from pre_commit.languages.ruby import _resource_bytesio
+from pre_commit.store import _make_local_repo
+from testing.language_helpers import run_language
+from testing.util import cwd
+from testing.util import xfailif_windows
+
+
+ACTUAL_GET_DEFAULT_VERSION = ruby.get_default_version.__wrapped__
+
+
+@pytest.fixture
+def find_exe_mck():
+    with mock.patch.object(parse_shebang, 'find_executable') as mck:
+        yield mck
+
+
+def test_uses_default_version_when_not_available(find_exe_mck):
+    find_exe_mck.return_value = None
+    assert ACTUAL_GET_DEFAULT_VERSION() == C.DEFAULT
+
+
+def test_uses_system_if_both_gem_and_ruby_are_available(find_exe_mck):
+    find_exe_mck.return_value = '/path/to/exe'
+    assert ACTUAL_GET_DEFAULT_VERSION() == 'system'
+
+
+@pytest.mark.parametrize(
+    'filename',
+    ('rbenv.tar.gz', 'ruby-build.tar.gz', 'ruby-download.tar.gz'),
+)
+def test_archive_root_stat(filename):
+    with _resource_bytesio(filename) as f:
+        with tarfile.open(fileobj=f) as tarf:
+            root, _, _ = filename.partition('.')
+            assert oct(tarf.getmember(root).mode) == '0o755'
+
+
+def _setup_hello_world(tmp_path):
+    bin_dir = tmp_path.joinpath('bin')
+    bin_dir.mkdir()
+    bin_dir.joinpath('ruby_hook').write_text(
+        '#!/usr/bin/env ruby\n'
+        "puts 'Hello world from a ruby hook'\n",
+    )
+    gemspec = '''\
+Gem::Specification.new do |s|
+    s.name = 'ruby_hook'
+    s.version = '0.1.0'
+    s.authors = ['Anthony Sottile']
+    s.summary = 'A ruby hook!'
+    s.description = 'A ruby hook!'
+    s.files = ['bin/ruby_hook']
+    s.executables = ['ruby_hook']
+end
+'''
+    tmp_path.joinpath('ruby_hook.gemspec').write_text(gemspec)
+
+
+def test_ruby_hook_system(tmp_path):
+    assert ruby.get_default_version() == 'system'
+
+    _setup_hello_world(tmp_path)
+
+    ret = run_language(tmp_path, ruby, 'ruby_hook')
+    assert ret == (0, b'Hello world from a ruby hook\n')
+
+
+def test_ruby_with_user_install_set(tmp_path):
+    gemrc = tmp_path.joinpath('gemrc')
+    gemrc.write_text('gem: --user-install\n')
+
+    with envcontext((('GEMRC', str(gemrc)),)):
+        test_ruby_hook_system(tmp_path)
+
+
+def test_ruby_additional_deps(tmp_path):
+    _make_local_repo(tmp_path)
+
+    ret = run_language(
+        tmp_path,
+        ruby,
+        'ruby -e',
+        args=('require "tins"',),
+        deps=('tins',),
+    )
+    assert ret == (0, b'')
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_ruby_hook_default(tmp_path):
+    _setup_hello_world(tmp_path)
+
+    out, ret = run_language(tmp_path, ruby, 'rbenv --help', version='default')
+    assert out == 0
+    assert ret.startswith(b'Usage: rbenv ')
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_ruby_hook_language_version(tmp_path):
+    _setup_hello_world(tmp_path)
+    tmp_path.joinpath('bin', 'ruby_hook').write_text(
+        '#!/usr/bin/env ruby\n'
+        'puts RUBY_VERSION\n'
+        "puts 'Hello world from a ruby hook'\n",
+    )
+
+    ret = run_language(tmp_path, ruby, 'ruby_hook', version='3.2.0')
+    assert ret == (0, b'3.2.0\nHello world from a ruby hook\n')
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_ruby_with_bundle_disable_shared_gems(tmp_path):
+    workdir = tmp_path.joinpath('workdir')
+    workdir.mkdir()
+    # this needs a `source` or there's a deprecation warning
+    # silencing this with `BUNDLE_GEMFILE` breaks some tools (#2739)
+    workdir.joinpath('Gemfile').write_text('source ""\ngem "lol_hai"\n')
+    # this bundle config causes things to be written elsewhere
+    bundle = workdir.joinpath('.bundle')
+    bundle.mkdir()
+    bundle.joinpath('config').write_text(
+        'BUNDLE_DISABLE_SHARED_GEMS: true\n'
+        'BUNDLE_PATH: vendor/gem\n',
+    )
+
+    with cwd(workdir):
+        # `3.2.0` has new enough `gem` reading `.bundle`
+        test_ruby_hook_language_version(tmp_path)