Add a test case for switch error code (issue #161)

tests/test7.in

@@ -0,0 +1,30 @@
+# Test that subsequent cases do not blow away the status from previous ones
+for val in one two three four
+	switch $val
+	case one
+		/bin/sh -c 'exit 1'
+	case two
+		/bin/sh -c 'exit 2'
+	case three
+		/bin/sh -c 'exit 3'
+	end
+	echo $status
+end
+
+echo
+
+# Test that the `switch` builtin itself does not blow away status before evaluating a case
+false
+switch one
+case one
+	echo $status
+end
+
+# Test that non-case tokens inside `switch` don't blow away status
+# (why are these even allowed?)
+false
+switch one
+true
+case one
+	echo $status
+end

tests/test7.out

@@ -0,0 +1,7 @@
+1
+2
+3
+0
+
+1
+1

tests/test7.status

@@ -0,0 +1 @@
+0

tests/top.out

@@ -4,3 +4,5 @@ File test2.in tested ok
 File test3.in tested ok
 File test4.in tested ok
 File test5.in tested ok
+File test6.in tested ok
+File test7.in tested ok