Add missing methods to SubTextIO

src/multicsv/subtextio.py

@@ -1,4 +1,3 @@
-
 from typing import TextIO, List, Optional, Type, Iterable
 import os
 
@@ -116,6 +115,26 @@ def __init__(self, base_io: TextIO, start: int, end: int):
     def mode(self) -> str:
         return self.base_io.mode
 
+    @property
+    def closed(self) -> bool:
+        return self._closed
+
+    @property
+    def name(self) -> str:
+        return self.base_io.name
+
+    @property
+    def encoding(self) -> str:
+        return self.base_io.encoding
+
+    @property
+    def errors(self) -> Optional[str]:
+        return None
+
+    @property
+    def line_buffering(self) -> int:
+        return self.base_io.line_buffering
+
     def read(self, size: int = -1) -> str:
         if self._closed:
             raise ValueError("I/O operation on closed file.")
@@ -241,6 +260,21 @@ def flush(self) -> None:
             self.base_io.write(content_before + self._buffer + content_after)
             self.base_io.flush()
 
+    def isatty(self) -> bool:
+        return False
+
+    def fileno(self) -> int:
+        return self.base_io.fileno()
+
+    def readable(self) -> bool:
+        return self.base_io.readable()
+
+    def writable(self) -> bool:
+        return self.base_io.writable()
+
+    def seekable(self) -> bool:
+        return self.base_io.seekable()
+
     def __iter__(self) -> 'SubTextIO':
         return self
 

tests/test_subtextio.py

@@ -163,6 +163,17 @@ def test_long_write(base_textio):
     sub_text.seek(0)
     assert sub_text.read(len(long_text)) == long_text
 
+def test_closed(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.closed is False
+    sub_text.close()
+    assert sub_text.closed is True
+
+def test_closed_after_context(base_textio):
+    with SubTextIO(base_textio, start=6, end=21) as sub_text:
+        assert sub_text.closed is False
+    assert sub_text.closed is True
+
 # Test seek and read after close
 def test_operations_after_close(base_textio):
     sub_text = SubTextIO(base_textio, start=6, end=21)
@@ -298,3 +309,40 @@ def test_readlines_with_huge_hint(base_textio):
 def test_readlines_with_zero_hint(base_textio):
     sub_text = SubTextIO(base_textio, start=6, end=21)
     assert sub_text.readlines(hint=0) == ["World,\n"]
+
+def test_encoding(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.encoding == base_textio.encoding
+
+def test_errors(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.errors is None
+
+def test_line_buffering(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert not sub_text.line_buffering
+
+def test_newlines(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.newlines is None
+
+def test_isatty(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert not sub_text.isatty()
+
+def test_fileno(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    with pytest.raises(io.UnsupportedOperation):
+        sub_text.fileno()
+
+def test_readable(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.readable()
+
+def test_writable(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.writable()
+
+def test_seekable(base_textio):
+    sub_text = SubTextIO(base_textio, start=6, end=21)
+    assert sub_text.seekable()