4 files changed, 85 insertions, 3 deletions
diff --git a/tests/lang_base_test.py b/tests/lang_base_test.py
index a532b6a..1cffa0e 100644
--- a/tests/lang_base_test.py
+++ b/tests/lang_base_test.py
@@ -30,6 +30,19 @@ def homedir_mck():
         yield
 
 
+@pytest.fixture
+def no_sched_getaffinity():
+    # Simulates an OS without os.sched_getaffinity available (mac/windows)
+    # https://docs.python.org/3/library/os.html#interface-to-the-scheduler
+    with mock.patch.object(
+        os,
+        'sched_getaffinity',
+        create=True,
+        side_effect=AttributeError,
+    ):
+        yield
+
+
 def test_exe_exists_does_not_exist(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = None
     assert lang_base.exe_exists('ruby') is False
@@ -116,7 +129,17 @@ def test_no_env_noop(tmp_path):
     assert before == inside == after
 
 
-def test_target_concurrency_normal():
+def test_target_concurrency_sched_getaffinity(no_sched_getaffinity):
+    with mock.patch.object(
+        os,
+        'sched_getaffinity',
+        return_value=set(range(345)),
+    ):
+        with mock.patch.dict(os.environ, clear=True):
+            assert lang_base.target_concurrency() == 345
+
+
+def test_target_concurrency_without_sched_getaffinity(no_sched_getaffinity):
     with mock.patch.object(multiprocessing, 'cpu_count', return_value=123):
         with mock.patch.dict(os.environ, {}, clear=True):
             assert lang_base.target_concurrency() == 123
@@ -134,7 +157,7 @@ def test_target_concurrency_on_travis():
         assert lang_base.target_concurrency() == 2
 
 
-def test_target_concurrency_cpu_count_not_implemented():
+def test_target_concurrency_cpu_count_not_implemented(no_sched_getaffinity):
     with mock.patch.object(
             multiprocessing, 'cpu_count', side_effect=NotImplementedError,
     ):
diff --git a/tests/languages/golang_test.py b/tests/languages/golang_test.py
index ec5a878..6406267 100644
--- a/tests/languages/golang_test.py
+++ b/tests/languages/golang_test.py
@@ -128,7 +128,7 @@ def test_local_golang_additional_deps(tmp_path):
         deps=('golang.org/x/example/hello@latest',),
     )
 
-    assert ret == (0, b'Hello, Go examples!\n')
+    assert ret == (0, b'Hello, world!\n')
 
 
 def test_golang_hook_still_works_when_gobin_is_set(tmp_path):
diff --git a/tests/languages/haskell_test.py b/tests/languages/haskell_test.py
new file mode 100644
index 0000000..f888109
--- /dev/null
+++ b/tests/languages/haskell_test.py
@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+import pytest
+
+from pre_commit.errors import FatalError
+from pre_commit.languages import haskell
+from pre_commit.util import win_exe
+from testing.language_helpers import run_language
+
+
+def test_run_example_executable(tmp_path):
+    example_cabal = '''\
+cabal-version:      2.4
+name:               example
+version:            0.1.0.0
+
+executable example
+    main-is:          Main.hs
+
+    build-depends:    base >=4
+    default-language: Haskell2010
+'''
+    main_hs = '''\
+module Main where
+
+main :: IO ()
+main = putStrLn "Hello, Haskell!"
+'''
+    tmp_path.joinpath('example.cabal').write_text(example_cabal)
+    tmp_path.joinpath('Main.hs').write_text(main_hs)
+
+    result = run_language(tmp_path, haskell, 'example')
+    assert result == (0, b'Hello, Haskell!\n')
+
+    # should not symlink things into environments
+    exe = tmp_path.joinpath(win_exe('hs_env-default/bin/example'))
+    assert exe.is_file()
+    assert not exe.is_symlink()
+
+
+def test_run_dep(tmp_path):
+    result = run_language(tmp_path, haskell, 'hello', deps=['hello'])
+    assert result == (0, b'Hello, World!\n')
+
+
+def test_run_empty(tmp_path):
+    with pytest.raises(FatalError) as excinfo:
+        run_language(tmp_path, haskell, 'example')
+    msg, = excinfo.value.args
+    assert msg == 'Expected .cabal files or additional_dependencies'
diff --git a/tests/xargs_test.py b/tests/xargs_test.py
index 7c41f98..b0a8e0d 100644
--- a/tests/xargs_test.py
+++ b/tests/xargs_test.py
@@ -147,6 +147,15 @@ def test_xargs_retcode_normal():
     assert ret == 5
 
 
+@pytest.mark.xfail(sys.platform == 'win32', reason='posix only')
+def test_xargs_retcode_killed_by_signal():
+    ret, _ = xargs.xargs(
+        parse_shebang.normalize_cmd(('bash', '-c', 'kill -9 $$', '--')),
+        ('foo', 'bar'),
+    )
+    assert ret == -9
+
+
 def test_xargs_concurrency():
     bash_cmd = parse_shebang.normalize_cmd(('bash', '-c'))
     print_pid = ('sleep 0.5 && echo $$',)