test(windows): adapt test cases to Windows

- "ExtComm_1" requires Unix.
- "Sta_Fill_1" is pending on Windows.
- "AppendPath" and "TempSortDir" are divided into Unix and Windows cases
  because off the different path separators.

check/examples.frm

@@ -654,6 +654,7 @@ assert result("G") =~ expr("
     Local F = B(1);
     Print;
     .end
+#pend_if windows?
     assert finished?
     assert warning?
 *--#] Sta_Fill_1 :
@@ -1813,6 +1814,7 @@ Local aPLUSbTO3=
 
 Print;
 .end
+#require unix?
 # This gives Valgrind errors (3 memory leaks) on Travis CI
 # (osx-gcc-valgrind-parvorm), but cleanly works on Linux with mpich 3.2.
 # Might be an OS- or implementation-specific bug.

check/features.frm

@@ -220,7 +220,7 @@ assert result("F2")  =~ expr("0")
 assert result("F3")  =~ expr("0")
 assert result("F4")  =~ expr("0")
 *--#] partitions_ :
-*--#[ AppendPath :
+*--#[ AppendPath_unix :
 #include foo/foo1.h
 * foo/bar/p1.prc
 #call p1
@@ -238,6 +238,36 @@ P;
 #call p1
 P;
 .end
+#require unix?
+#prepare write "foo/foo1.h", "#prependpath bar\n"
+#prepare write "foo/foo2.h", "#appendpath bar\n"
+#prepare write "foo/bar/p1.prc", "#procedure p1()\nL F=1234;\n#endprocedure\n"
+#prepare write "foo/bar/p2.prc", "#procedure p2()\nL G=5678;\n#endprocedure\n"
+#prepare write "bar/p1.prc", "#procedure p1()\nL H=9012;\n#endprocedure\n"
+assert succeeded?
+assert result("F") =~ expr("1234")
+assert result("G") =~ expr("5678")
+assert result("H") =~ expr("9012")
+*--#] AppendPath_unix :
+*--#[ AppendPath_windows :
+#include foo\foo1.h
+* foo/bar/p1.prc
+#call p1
+P;
+.end
+#:path foo;bar
+#include foo1.h
+* foo/bar/p2.prc
+#call p2
+P;
+.end
+#:path foo;bar
+#include foo2.h
+* bar/p1.prc
+#call p1
+P;
+.end
+#require windows?
 #prepare write "foo/foo1.h", "#prependpath bar\n"
 #prepare write "foo/foo2.h", "#appendpath bar\n"
 #prepare write "foo/bar/p1.prc", "#procedure p1()\nL F=1234;\n#endprocedure\n"
@@ -247,7 +277,7 @@ assert succeeded?
 assert result("F") =~ expr("1234")
 assert result("G") =~ expr("5678")
 assert result("H") =~ expr("9012")
-*--#] AppendPath :
+*--#] AppendPath_windows :
 *--#[ TimeoutAfter_1 :
 #procedure problematicprocedure
 * Do nothing.
@@ -1089,13 +1119,25 @@ format C;
 assert succeeded?
 assert !(file("out.c") =~ /[_] [+]=  /)
 *--#] Issue392_ContinuationLines_0 :
-*--#[ TempSortDir :
+*--#[ TempSortDir_unix :
 #: TempSortDir bad/path
 Local test = 1;
 .end
+#require unix?
 if mpi?
   assert runtime_error?("Could not create sort file: bad/path/0formxxx.sor")
 else
   assert runtime_error?("Could not create sort file: bad/path/xformxxx.sor")
 end
-*--#] TempSortDir :
+*--#] TempSortDir_unix :
+*--#[ TempSortDir_windows :
+#: TempSortDir bad_path
+Local test = 1;
+.end
+#require windows?
+if mpi?
+  assert runtime_error?('Could not create sort file: bad_path\0formxxx.sor')
+else
+  assert runtime_error?('Could not create sort file: bad_path\xformxxx.sor')
+end
+*--#] TempSortDir_windows :