C#: Narrow string interpolation expressions to a specific single file in testcase.

Author: michaelnebel

csharp/ql/test/library-tests/csharp10/constInterpolatedString.ql

@@ -1,7 +1,13 @@
 import csharp
 
-query predicate inserts(InterpolatedStringExpr expr, Expr e) { expr.getAnInsert() = e }
+private predicate inSpecificSource(Expr expr) {
+  expr.getFile().getBaseName() = "ConstInterpolatedString.cs"
+}
+
+query predicate inserts(InterpolatedStringExpr expr, Expr e) {
+  expr.getAnInsert() = e and inSpecificSource(expr)
+}
 
 query predicate texts(InterpolatedStringExpr expr, StringLiteral literal) {
-  expr.getAText() = literal
+  expr.getAText() = literal and inSpecificSource(expr)
 }