buildmimetree.py: remove quickndirty file io hack

diff --git a/.config/neomutt/buildmimetree.py b/.config/neomutt/buildmimetree.py
index f5e3c17ae74512fada4032db862cb72cf29317f1..c541ed12094e9ff1c22ab147e5eb9824ff9b6f73 100755 (executable)
--- a/.config/neomutt/buildmimetree.py
+++ b/.config/neomutt/buildmimetree.py
@@ -231,10 +231,6 @@ class File:
         if cache and self._cache[File.Op.R]:
             return self._get_cache(File.Op.R)
 
-        if not self._file:
-            with self as f:
-                return f.read(cache=cache)
-
         if self._lastop == File.Op.W:
             try:
                 self._file.seek(0)
@@ -251,10 +247,6 @@ class File:
 
     def write(self, s, *, cache=True):
 
-        if not self._file:
-            with self as f:
-                return f.write(s, cache=cache)
-
         if self._lastop == File.Op.R:
             try:
                 self._file.seek(0)
@@ -644,7 +636,9 @@ def extract_signature(text, *, filefactory=FileFactory()):
         path = pathlib.Path(re.split(r" +", lines.pop(0), maxsplit=1)[1])
         textsig = "\n".join(lines)
 
-        sig_input = filefactory(path.expanduser()).read()
+        with filefactory(path.expanduser()) as sig_f:
+            sig_input = sig_f.read()
+
         soup = bs4.BeautifulSoup(sig_input, "html.parser")
 
         style = str(soup.style.extract()) if soup.style else ""
@@ -1537,10 +1531,10 @@ try:
 
         @pytest.mark.converter
         def test_converter_tree_basic(self, fakepath, const1, fakefilefactory):
-            draft_f = fakefilefactory(fakepath, content=const1)
-            tree = convert_markdown_to_html(
-                draft_f, filefactory=fakefilefactory
-            )
+            with fakefilefactory(fakepath, content=const1) as draft_f:
+                tree = convert_markdown_to_html(
+                    draft_f, filefactory=fakefilefactory
+                )
 
             assert tree.subtype == "alternative"
             assert len(tree.children) == 2
@@ -1554,8 +1548,8 @@ try:
         def test_converter_writes(
             self, fakepath, fakefilefactory, const1, monkeypatch
         ):
-            draft_f = fakefilefactory(fakepath, content=const1)
-            convert_markdown_to_html(draft_f, filefactory=fakefilefactory)
+            with fakefilefactory(fakepath, content=const1) as draft_f:
+                convert_markdown_to_html(draft_f, filefactory=fakefilefactory)
 
             html = fakefilefactory.pop()
             assert fakepath.with_suffix(".html") == html[0]
@@ -1749,7 +1743,6 @@ try:
             @pytest.mark.styling
             def test_massage_styling_to_converter(self):
                 css = "p { color:red }"
-                css_f = File(content=css)
                 css_applied = []
 
                 def converter(draft_f, css_f, **kwargs):
@@ -1757,12 +1750,17 @@ try:
                     css_applied.append(css)
                     return Part("text", "plain", draft_f.path, orig=True)
 
-                do_massage(
-                    draft_f=File(),
-                    cmd_f=File(),
-                    css_f=css_f,
-                    converter=converter,
-                )
+                with (
+                    File() as draft_f,
+                    File(mode="w") as cmd_f,
+                    File(content=css) as css_f
+                ):
+                    do_massage(
+                        draft_f=draft_f,
+                        cmd_f=cmd_f,
+                        css_f=css_f,
+                        converter=converter,
+                    )
                 assert css_applied[0] == css
 
             @pytest.mark.converter
@@ -1831,11 +1829,10 @@ try:
             assert htmlsig == sigconst.format(path=fakepath)
 
         @pytest.mark.sig
-        def test_signature_extraction_file_not_found(self, const1):
-            path = pathlib.Path("/does/not/exist")
+        def test_signature_extraction_file_not_found(self, fakepath, const1):
             with pytest.raises(FileNotFoundError):
                 origtext, textsig, htmlsig = extract_signature(
-                    f"{const1}{EMAIL_SIG_SEP}{HTML_SIG_MARKER}{path}\n{const1}"
+                    f"{const1}{EMAIL_SIG_SEP}{HTML_SIG_MARKER}{fakepath}\n{const1}"
                 )
 
         @pytest.mark.imgproc
@@ -2109,6 +2106,11 @@ try:
                 f.write(const1, cache=False)
                 assert f.read(cache=False) == const1
 
+        @pytest.mark.fileio
+        def test_file_class_path_no_exists(self, fakepath):
+            with pytest.raises(FileNotFoundError):
+                File(fakepath, mode="r").open()
+
         @pytest.mark.fileio
         def test_file_class_cache(self, tmp_path, const1, const2):
             path = tmp_path / "file"