Rust: Fix model generation test

Author: paldepind

rust/ql/lib/utils/test/InlineMadTest.qll

@@ -0,0 +1,21 @@
+private import rust as R
+private import codeql.mad.test.InlineMadTest
+
+private module InlineMadTestLang implements InlineMadTestLangSig {
+  class Callable = R::Function;
+
+  string getComment(R::Function callable) {
+    exists(R::Comment comment |
+      result = comment.getCommentText() and
+      comment.getLocation().getFile() = callable.getLocation().getFile() and
+      // When a function is preceded by comments its start line is the line of
+      // the first comment. Hence all relevant comments are found by including
+      // comments from the start line and up to the line with the function
+      // name.
+      callable.getLocation().getStartLine() <= comment.getLocation().getStartLine() and
+      comment.getLocation().getStartLine() <= callable.getName().getLocation().getStartLine()
+    )
+  }
+}
+
+import InlineMadTestImpl<InlineMadTestLang>