[spec/redirect-glob] New tests for redirects with globs

This is a bash/zsh feature.  It's arguably weird, but I did use it, and
others may run into it.

Part of issue #1521

osh/cmd_eval.py

@@ -421,7 +421,10 @@ def _EvalRedirect(self, r):
                     r.op.id)  # could be static in the LST?
 
                 if redir_type == redir_arg_type_e.Path:
-                    # NOTES
+                    # Note: Only bash and zsh allow globbing a path.  If there
+                    # are multiple files, zsh opens BOTH, but bash exits with
+                    # error 1.
+
                     # - no globbing.  You can write to a file called '*.py'.
                     # - set -o strict-array prevents joining by spaces
                     val = self.word_ev.EvalWordToString(arg_word)

spec/redirect-glob.test.sh

@@ -0,0 +1,137 @@
+## compare_shells: bash mksh zsh ash
+## oils_failures_allowed: 3
+
+#### file redirects with glob args (bash and zsh only)
+
+touch one-bar
+
+echo hi > one-*
+
+cat one-bar
+
+echo escaped > one-\*
+
+cat one-\*
+
+## STDOUT:
+hi
+escaped
+## END
+## N-I dash/mksh/ash STDOUT:
+escaped
+## END
+
+#### file redirect to $var with glob char
+
+touch two-bar
+
+star='*'
+
+echo hi > two-$star
+echo status=$?
+
+head two-bar two-\*
+
+## status: 0
+## STDOUT:
+status=0
+==> two-bar <==
+
+==> two-* <==
+hi
+## END
+
+## BUG bash status: 1
+## BUG bash STDOUT:
+status=0
+==> two-bar <==
+hi
+## END
+
+#### file redirect that globs to more than one file (bash and zsh only)
+
+touch foo-bar
+touch foo-spam
+
+echo hi > foo-*
+echo status=$?
+
+head foo-bar foo-spam
+
+## STDOUT:
+status=1
+==> foo-bar <==
+
+==> foo-spam <==
+## END
+
+## N-I dash/mksh/ash STDOUT:
+status=0
+==> foo-bar <==
+
+==> foo-spam <==
+## END
+
+## BUG zsh STDOUT:
+status=0
+==> foo-bar <==
+hi
+
+==> foo-spam <==
+hi
+## END
+
+#### file redirect with extended glob (bash only)
+
+shopt -s extglob
+
+touch foo-bar
+
+echo hi > @(*-bar|other)
+echo status=$?
+
+cat foo-bar
+
+## status: 0
+## STDOUT:
+status=0
+hi
+## END
+
+## N-I zsh status: 1
+## N-I dash/ash status: 2
+
+## N-I dash/zsh/ash STDOUT:
+## END
+
+## BUG mksh status: 0
+## BUG mksh STDOUT:
+status=0
+## END
+
+#### other redirects with glob args
+
+touch 10
+
+exec 10>&1  # open stdout as descriptor 10
+
+# Does this go to stdout?  ONLY bash respects it, not zsh
+echo should-not-be-on-stdout >& 1*
+
+echo stdout
+echo stderr >&2
+
+## status: 0
+
+## STDOUT:
+stdout
+## END
+
+## BUG bash STDOUT:
+should-not-be-on-stdout
+stdout
+## END
+
+## N-I dash/zsh status: 127
+## N-I dash/zsh STDOUT:
+## END

spec/redirect.test.sh

@@ -337,7 +337,7 @@ echo XX >| $TMP/c.txt
 
 set -o noclobber
 
-echo YY >  $TMP/c.txt  # not globber
+echo YY >  $TMP/c.txt  # not clobber
 echo status=$?
 
 cat $TMP/c.txt

test/spec.sh

@@ -340,6 +340,10 @@ redirect() {
     ${REF_SHELLS[@]} $OSH_LIST "$@"
 }
 
+redirect-glob() {
+  run-file redirect-glob "$@"
+}
+
 posix() {
   sh-spec spec/posix.test.sh \
     ${REF_SHELLS[@]} $OSH_LIST "$@"