test(test_wrap_stdio): add wrap_stdio tests

Author: saygox

commitizen/wrap_stdio.py

@@ -10,9 +10,7 @@
 
 def wrap_stdio():
     _wrap_stdio()
-    return None
 
 
 def unwrap_stdio():
     _unwrap_stdio()
-    return None

tests/test_wrap_stdio.py

@@ -0,0 +1,56 @@
+import sys
+
+from commitizen import wrap_stdio, wrap_stdio_linux, wrap_stdio_unix, wrap_stdio_windows
+
+
+def test_warp_stdio_exists():
+    assert hasattr(wrap_stdio_windows, "sys")
+    assert hasattr(wrap_stdio_linux, "sys")
+    assert hasattr(wrap_stdio_unix, "sys")
+
+
+if sys.platform == "win32":  # pragma: no cover
+    pass
+elif sys.platform == "linux":
+    from commitizen.wrap_stdio_linux import WrapStdioLinux
+
+    def test_wrap_stdio_linux(mocker):
+
+        tmp_stdin = sys.stdin
+        tmp_stdout = sys.stdout
+        tmp_stderr = sys.stderr
+
+        mocker.patch("os.open")
+        readerwriter_mock = mocker.mock_open(read_data="data")
+        mocker.patch("builtins.open", readerwriter_mock, create=True)
+
+        mocker.patch.object(sys.stdin, "fileno", return_value=0)
+        mocker.patch.object(sys.stdout, "fileno", return_value=1)
+        mocker.patch.object(sys.stdout, "fileno", return_value=2)
+
+        wrap_stdio.wrap_stdio()
+
+        assert sys.stdin != tmp_stdin
+        assert isinstance(sys.stdin, WrapStdioLinux)
+        assert sys.stdin.encoding == "UTF-8"
+        assert sys.stdin.read() == "data"
+
+        assert sys.stdout != tmp_stdout
+        assert isinstance(sys.stdout, WrapStdioLinux)
+        sys.stdout.write("stdout")
+        readerwriter_mock().write.assert_called_with("stdout")
+
+        assert sys.stderr != tmp_stderr
+        assert isinstance(sys.stderr, WrapStdioLinux)
+        sys.stdout.write("stderr")
+        readerwriter_mock().write.assert_called_with("stderr")
+
+        wrap_stdio.unwrap_stdio()
+
+        assert sys.stdin == tmp_stdin
+        assert sys.stdout == tmp_stdout
+        assert sys.stderr == tmp_stderr
+
+
+else:
+    pass