Ruby: Add another call graph test

Author: hvitved

ruby/ql/test/library-tests/modules/callgraph.expected

@@ -186,6 +186,7 @@ getTarget
 | calls.rb:488:1:488:31 | call to singleton | calls.rb:481:5:483:7 | singleton |
 | calls.rb:494:1:494:32 | call to singleton | calls.rb:481:5:483:7 | singleton |
 | calls.rb:501:1:501:32 | call to singleton | calls.rb:481:5:483:7 | singleton |
+| calls.rb:504:1:504:13 | call to singleton | calls.rb:481:5:483:7 | singleton |
 | calls.rb:507:1:507:13 | call to singleton | calls.rb:481:5:483:7 | singleton |
 | calls.rb:516:5:516:35 | call to include | calls.rb:108:5:110:7 | include |
 | calls.rb:519:9:519:35 | call to puts | calls.rb:102:5:102:30 | puts |

ruby/ql/test/library-tests/modules/calls.rb

@@ -501,7 +501,7 @@ module ExtendSingletonMethod3
 ExtendSingletonMethod3.singleton
 
 foo = "hello"
-
+foo.singleton # NoMethodError
 foo.extend ExtendSingletonMethod
 
 foo.singleton

ruby/ql/test/library-tests/modules/modules.expected

@@ -1231,6 +1231,8 @@ enclosingModule
 | calls.rb:503:1:503:13 | ... = ... | calls.rb:1:1:543:28 | calls.rb |
 | calls.rb:503:7:503:13 | "hello" | calls.rb:1:1:543:28 | calls.rb |
 | calls.rb:503:8:503:12 | hello | calls.rb:1:1:543:28 | calls.rb |
+| calls.rb:504:1:504:3 | foo | calls.rb:1:1:543:28 | calls.rb |
+| calls.rb:504:1:504:13 | call to singleton | calls.rb:1:1:543:28 | calls.rb |
 | calls.rb:505:1:505:3 | foo | calls.rb:1:1:543:28 | calls.rb |
 | calls.rb:505:1:505:32 | call to extend | calls.rb:1:1:543:28 | calls.rb |
 | calls.rb:505:12:505:32 | ExtendSingletonMethod | calls.rb:1:1:543:28 | calls.rb |