Respect dcr=true when interactive is pressed (guardian#24672)

* Respect dcr=true when interactive is pressed

Author: ioannakok

applications/app/services/InteractivePicker.scala

@@ -24,13 +24,13 @@ object InteractivePicker {
       request: RequestHeader,
   ): RenderingTier = {
     // Allows us to press via InterativeLibrarian and also debug interactives rendering via dcr
-    val forceDCROff = request.forceDCROff
     val fullPath = ensureStartingForwardSlash(path)
 
     // Allow us to quickly revert to rendering content (instead of serving pressed content)
     val switchOn = InteractivePickerFeature.isSwitchedOn
 
-    if (forceDCROff) FrontendLegacy
+    if (request.forceDCROff) FrontendLegacy
+    else if (request.forceDCR) DotcomRendering
     else if (isPressed(fullPath) && switchOn) PressedInteractive
     else DotcomRendering
   }

applications/test/services/InteractivePickerTest.scala

@@ -42,4 +42,14 @@ import play.api.test.Helpers._
 
     tier should be(DotcomRendering)
   }
+
+  it should "return DotcomRendering if interactive is pressed and dcr=true" in {
+    val testRequest = TestRequest(s"$path?dcr=true")
+    val tier =
+      InteractivePicker.getRenderingTier(path, MockPressedInteractives.isPressed)(
+        testRequest,
+      )
+
+    tier should be(DotcomRendering)
+  }
 }