testing: avoid legacy forms of warns, raises, deprecated_call

Use the nicer `with` forms instead.

Author: jakkdl

testing/_py/test_local.py

@@ -620,7 +620,8 @@ def test_chdir_gone(self, path1):
         p = path1.ensure("dir_to_be_removed", dir=1)
         p.chdir()
         p.remove()
-        pytest.raises(error.ENOENT, local)
+        with pytest.raises(error.ENOENT):
+            local()
         assert path1.chdir() is None
         assert os.getcwd() == str(path1)
 
@@ -989,8 +990,10 @@ def test_locked_make_numbered_dir(self, tmpdir):
                 assert numdir.new(ext=str(j)).check()
 
     def test_error_preservation(self, path1):
-        pytest.raises(EnvironmentError, path1.join("qwoeqiwe").mtime)
-        pytest.raises(EnvironmentError, path1.join("qwoeqiwe").read)
+        with pytest.raises(EnvironmentError):
+            path1.join("qwoeqiwe").mtime()
+        with pytest.raises(EnvironmentError):
+            path1.join("qwoeqiwe").read()
 
     # def test_parentdirmatch(self):
     #    local.parentdirmatch('std', startmodule=__name__)
@@ -1090,7 +1093,8 @@ def test_pyimport_check_filepath_consistency(self, monkeypatch, tmpdir):
         pseudopath = tmpdir.ensure(name + "123.py")
         mod.__file__ = str(pseudopath)
         monkeypatch.setitem(sys.modules, name, mod)
-        excinfo = pytest.raises(pseudopath.ImportMismatchError, p.pyimport)
+        with pytest.raises(pseudopath.ImportMismatchError) as excinfo:
+            p.pyimport()
         modname, modfile, orig = excinfo.value.args
         assert modname == name
         assert modfile == pseudopath
@@ -1388,7 +1392,8 @@ def test_stat_helpers(self, tmpdir, monkeypatch):
 
     def test_stat_non_raising(self, tmpdir):
         path1 = tmpdir.join("file")
-        pytest.raises(error.ENOENT, path1.stat)
+        with pytest.raises(error.ENOENT):
+            path1.stat()
         res = path1.stat(raising=False)
         assert res is None
 

testing/code/test_code.py

@@ -85,10 +85,8 @@ def test_code_from_func() -> None:
 def test_unicode_handling() -> None:
     value = "ąć".encode()
 
-    def f() -> None:
-        raise ValueError(value)
-
-    excinfo = pytest.raises(ValueError, f)
+    with pytest.raises(Exception) as excinfo:
+        raise Exception(value)
     str(excinfo)