C#: Add more conditional access tests

Author: hvitved

csharp/ql/test/library-tests/csharp6/MemberAccess.expected

@@ -0,0 +1,11 @@
+memberAccess
+| csharp6.cs:25:83:25:89 | access to property Length | csharp6.cs:25:79:25:81 | access to local variable bar | Conditional |
+| csharp6.cs:27:77:27:83 | access to property Length | csharp6.cs:27:73:27:75 | access to local variable bar | Conditional |
+| csharp6.cs:32:68:32:70 | access to indexer | csharp6.cs:32:38:32:66 | object creation of type Dictionary<Int32,String> | Conditional |
+| csharp6.cs:32:68:32:73 | access to indexer | csharp6.cs:32:68:32:70 | access to indexer | Unconditional |
+methodCall
+| csharp6.cs:30:35:30:44 | call to method ToUpper | csharp6.cs:30:31:30:33 | access to local variable foo | Conditional |
+extensionMethodCall
+| csharp6.cs:29:39:29:44 | call to method Any<Char> | csharp6.cs:29:35:29:37 | access to local variable bar | Conditional |
+| csharp6.cs:30:35:30:66 | call to method Select<Char,Boolean> | csharp6.cs:30:35:30:44 | call to method ToUpper | Unconditional |
+| csharp6.cs:30:68:30:75 | call to method Count<Boolean> | csharp6.cs:30:35:30:66 | call to method Select<Char,Boolean> | Conditional |

csharp/ql/test/library-tests/csharp6/MemberAccess.ql

@@ -0,0 +1,16 @@
+import csharp
+
+query predicate memberAccess(MemberAccess ma, Expr qualifier, string conditional) {
+  qualifier = ma.getQualifier() and
+  if ma.isConditional() then conditional = "Conditional" else conditional = "Unconditional"
+}
+
+query predicate methodCall(MethodCall mc, Expr qualifier, string conditional) {
+  qualifier = mc.getQualifier() and
+  if mc.isConditional() then conditional = "Conditional" else conditional = "Unconditional"
+}
+
+query predicate extensionMethodCall(ExtensionMethodCall mc, Expr qualifier, string conditional) {
+  qualifier = mc.getArgument(0) and
+  if mc.isConditional() then conditional = "Conditional" else conditional = "Unconditional"
+}