C#: Add XML overlay tests.

Author: michaelnebel

csharp/ql/test/library-tests/overlay/base/test.expected

@@ -261,3 +261,16 @@ typeMentions
 | Program.cs:60:10:60:16 | ProgramAttribute |
 | Program.cs:61:16:61:19 | Void |
 | Program.cs:64:37:64:45 | Attribute |
+xmlLocatables
+| web.changed.config:2:1:12:17 | configuration |
+| web.changed.config:3:3:4:16 | system.web |
+| web.changed.config:5:3:11:22 | system.webServer |
+| web.changed.config:6:5:10:20 | httpProtocol |
+| web.changed.config:7:7:9:23 | customHeaders |
+| web.changed.config:8:9:8:42 | add |
+| web.changed.config:8:9:8:42 | name=MyOption |
+| web.changed.config:8:9:8:42 | value=1 |
+| web.unchanged.config:2:1:6:17 | configuration |
+| web.unchanged.config:3:3:5:16 | system.web |
+| web.unchanged.config:4:5:4:37 | httpCookies |
+| web.unchanged.config:4:5:4:37 | requireSSL=true |

csharp/ql/test/library-tests/overlay/base/web.changed.config

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <system.web>
+  </system.web>
+  <system.webServer>
+    <httpProtocol>
+      <customHeaders>
+        <add name="MyOption" value="1" />
+      </customHeaders>
+    </httpProtocol>
+  </system.webServer>
+</configuration>

csharp/ql/test/library-tests/overlay/base/web.unchanged.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <system.web>
+    <httpCookies requireSSL="true"/>
+  </system.web>
+</configuration>

csharp/ql/test/library-tests/overlay/overlay/test.expected

@@ -265,3 +265,10 @@ typeMentions
 | Program.cs:60:10:60:16 | ProgramAttribute |
 | Program.cs:61:16:61:19 | Void |
 | Program.cs:64:37:64:45 | Attribute |
+xmlLocatables
+| web.changed.config:2:1:5:17 | configuration |
+| web.changed.config:3:3:4:16 | system.web |
+| web.unchanged.config:2:1:6:17 | configuration |
+| web.unchanged.config:3:3:5:16 | system.web |
+| web.unchanged.config:4:5:4:37 | httpCookies |
+| web.unchanged.config:4:5:4:37 | requireSSL=true |

csharp/ql/test/library-tests/overlay/overlay/web.changed.config

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <system.web>
+  </system.web>
+</configuration>

csharp/ql/test/library-tests/overlay/overlay/web.unchanged.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+  <system.web>
+    <httpCookies requireSSL="true"/>
+  </system.web>
+</configuration>

csharp/ql/test/library-tests/overlay/test.ql

@@ -37,3 +37,5 @@ query predicate commentLines(CommentLine cl) { any() }
 query predicate commentBlocks(CommentBlock cb) { any() }
 
 query predicate typeMentions(TypeMention tm) { any() }
+
+query predicate xmlLocatables(XmlLocatable xl) { any() }