C++: Test goto target counts

Exercise multiple forward and backward targets and a single forward target for cpp/use-of-goto.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: geoffw0

cpp/ql/test/query-tests/Best Practices/UseOfGoto/UseOfGoto.cpp

@@ -0,0 +1,41 @@
+void multiple_forward_and_backward_targets_one() { // $ Alert
+  goto forward_one;
+  goto forward_two;
+forward_one:
+  ;
+forward_two:
+  ;
+backward_one:
+  ;
+backward_two:
+  ;
+  goto backward_one;
+  goto backward_two;
+}
+
+void multiple_forward_and_backward_targets_two() { // $ Alert
+  goto next_one;
+  goto next_two;
+next_one:
+  ;
+next_two:
+  ;
+earlier_one:
+  ;
+earlier_two:
+  ;
+  goto earlier_one;
+  goto earlier_two;
+}
+
+void one_forward_target_is_not_enough() {
+  goto forward;
+forward:
+  ;
+backward_one:
+  ;
+backward_two:
+  ;
+  goto backward_one;
+  goto backward_two;
+}

cpp/ql/test/query-tests/Best Practices/UseOfGoto/UseOfGoto.expected

@@ -0,0 +1,2 @@
+| UseOfGoto.cpp:1:6:1:46 | definition of multiple_forward_and_backward_targets_one | Multiple forward and backward goto statements may make function multiple_forward_and_backward_targets_one hard to understand. |
+| UseOfGoto.cpp:16:6:16:46 | definition of multiple_forward_and_backward_targets_two | Multiple forward and backward goto statements may make function multiple_forward_and_backward_targets_two hard to understand. |

cpp/ql/test/query-tests/Best Practices/UseOfGoto/UseOfGoto.qlref

@@ -0,0 +1,2 @@
+query: Best Practices/UseOfGoto.ql
+postprocess: utils/test/InlineExpectationsTestQuery.ql