Add missing test Java files

java/ql/test/library-tests/pattern-switch/dfg/GuardTest.java

@@ -0,0 +1,30 @@
+public class GuardTest {
+
+  public static void sink(String s) { }
+  public static boolean isSafe(String s) { return s.length() < 10; }
+
+  public static void test(Object o) {
+
+    switch (o) {
+
+      case String s:
+        sink(s);
+        break;
+      default:
+        break;
+
+    }
+
+    switch (o) {
+
+      case String s when isSafe(s):
+        sink(s);
+        break;
+      default:
+        break;
+
+    }
+
+  }
+
+}

java/ql/test/library-tests/pattern-switch/dfg/RecordTest.java

@@ -0,0 +1,48 @@
+public class RecordTest {
+
+  interface I { }
+  record Middle(String field) { }
+  record A(Middle afield) implements I { }
+  record B(Middle bfield) implements I { }
+
+  public static String sink(String s) { return s; }
+
+  public static void test(boolean inp) {
+
+    I i = inp ? new A(new Middle("A")) : new B(new Middle("B"));
+
+    switch(i) {
+      case A(Middle(String field)):
+        sink(field);
+        break;
+      case B(Middle(String field)):
+        sink(field);
+        break;
+      default:
+        break;
+    }
+
+    switch(i) {
+      case A(Middle(String field)) -> sink(field);
+      case B(Middle(String field)) -> sink(field);
+      default -> { }
+    }
+
+    var x = switch(i) {
+      case A(Middle(String field)):
+        yield sink(field);
+      case B(Middle(String field)):
+        yield sink(field);
+      default:
+        yield "Default case";
+    };
+
+    var y = switch(i) {
+      case A(Middle(String field)) -> sink(field);
+      case B(Middle(String field)) -> sink(field);
+      default -> "Default case";
+    };
+
+  }
+
+}