Merge 1da5a82 into 5fddf69

tests/grammars/Listeners.g4

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2023 Renata Hodovan, Akos Kiss.
+ *
+ * Licensed under the BSD 3-Clause License
+ * <LICENSE.rst or https://opensource.org/licenses/BSD-3-Clause>.
+ * This file may not be copied, modified, or distributed except
+ * according to those terms.
+ */
+
+/*
+ * This test checks whether DefaultListener and DispatchingListener
+ * work as expected.
+ */
+
+// TEST-PROCESS: {grammar}.g4 -o {tmpdir}
+// TEST-GENERATE: {grammar}Generator.{grammar}Generator -r start -j 1 -n 5 --listener grammarinator.runtime.DefaultListener -o {tmpdir}/{grammar}%d.txt
+// TEST-GENERATE: {grammar}Generator.{grammar}Generator -r start -j 1 -n 5 --listener ListenersGenerator.CustomListener -o {tmpdir}/{grammar}%d.txt
+
+grammar Listeners;
+
+@header {
+
+from grammarinator.runtime import DispatchingListener
+
+
+class CustomListener(DispatchingListener):
+
+    def __init__(self):
+        self.enter_cnt = 0
+        self.exit_cnt = 0
+
+    def enter_a(self, node):
+        self.enter_cnt += 1
+
+    def exit_a(self, node):
+        self.exit_cnt += 1
+
+    def enter_b(self, node):
+        self.enter_cnt += 1
+
+    def exit_b(self, node):
+        self.exit_cnt += 1
+
+    def exit_start(self, node):
+        assert self.enter_cnt == 1, self.enter_cnt
+        assert self.exit_cnt == 1, self.exit_cnt
+}
+
+
+start : a | b;
+a : A ;
+b : B ;
+
+A : 'a' ;
+B : 'b' ;