ppTests Add missing undefineall test.

sv-parser-pp/src/preprocess.rs

@@ -1645,4 +1645,21 @@ mod tests {
             testfile_contents("expected/undef.sv")
         );
     } // }}}
+
+    #[test]
+    fn undefineall() { // {{{
+        let include_paths = [testfile_path("")];
+        let (ret, _) = preprocess(
+            testfile_path("undefineall.sv"),
+            &HashMap::new(),
+            &include_paths,
+            false,
+            false,
+        )
+        .unwrap();
+        assert_eq!(
+            ret.text(),
+            testfile_contents("expected/undefineall.sv")
+        );
+    } // }}}
 }

sv-parser-pp/testcases/expected/undefineall.sv

@@ -1,11 +1,11 @@
-// IEEE1800-2017 Clause 22.5.2
-// The directive `undef shall undefine the specified text macro if previously
-// defined by a `define compiler directive within the compilation unit. An
-// attempt to undefine a text macro that was not previously defined using a
-// `define compiler directive can issue a warning.
-`undef FOO
-`undef FOO// Comment
-`undef FOO // Comment
+// IEEE1800-2017 Clause 22.5.3
+// The directive `undefineall directive shall undefine all text macros
+// previously defined by `define compiler directives within the compilation
+// unit. This directive takes no argument and may appear anywhere in the source
+// description.
+`undefineall
+`undefineall// Comment
+`undefineall // Comment
 
 `define FOO foo
 `define BAR bar