patch 8.0.0251: not easy to select Python 2 or 3
Problem: It is not so easy to write a script that works with both Python 2
and Python 3, even when the Python code works with both.
Solution: Add 'pyxversion', :pyx, etc. (Marc Weber, Ken Takata)
diff --git a/src/testdir/test_pyx2.vim b/src/testdir/test_pyx2.vim
new file mode 100644
index 0000000..50e57c3
--- /dev/null
+++ b/src/testdir/test_pyx2.vim
@@ -0,0 +1,74 @@
+" Test for pyx* commands and functions with Python 2.
+
+set pyx=2
+if !has('python')
+ finish
+endif
+
+let s:py2pattern = '^2\.[0-7]\.\d\+'
+let s:py3pattern = '^3\.\d\+\.\d\+'
+
+
+func Test_has_pythonx()
+ call assert_true(has('pythonx'))
+endfunc
+
+
+func Test_pyx()
+ redir => var
+ pyx << EOF
+import sys
+print(sys.version)
+EOF
+ redir END
+ call assert_match(s:py2pattern, split(var)[0])
+endfunc
+
+
+func Test_pyxdo()
+ pyx import sys
+ enew
+ pyxdo return sys.version.split("\n")[0]
+ call assert_match(s:py2pattern, split(getline('.'))[0])
+endfunc
+
+
+func Test_pyxeval()
+ pyx import sys
+ call assert_match(s:py2pattern, split(pyxeval('sys.version'))[0])
+endfunc
+
+
+func Test_pyxfile()
+ " No special comments nor shebangs
+ redir => var
+ pyxfile pyxfile/pyx.py
+ redir END
+ call assert_match(s:py2pattern, split(var)[0])
+
+ " Python 2 special comment
+ redir => var
+ pyxfile pyxfile/py2_magic.py
+ redir END
+ call assert_match(s:py2pattern, split(var)[0])
+
+ " Python 2 shebang
+ redir => var
+ pyxfile pyxfile/py2_shebang.py
+ redir END
+ call assert_match(s:py2pattern, split(var)[0])
+
+ if has('python3')
+ " Python 3 special comment
+ redir => var
+ pyxfile pyxfile/py3_magic.py
+ redir END
+ call assert_match(s:py3pattern, split(var)[0])
+
+ " Python 3 shebang
+ redir => var
+ pyxfile pyxfile/py3_shebang.py
+ redir END
+ call assert_match(s:py3pattern, split(var)[0])
+ endif
+endfunc