Add test to spot FAPI/CAPI incompatability

We're adding a test that will break at build time rather than runtime if
our versions of the FAPI & CAPI clients are incompatible.

See also:

* #25139 (comment)
* https://github.com/guardian/ophan/pull/4719/files#diff-ee7f97c92065084bba37d70d043ad0daa0d7745f235d0ad3206b59f073829529

facia-press/test/frontpress/FaciaClientTest.scala

@@ -0,0 +1,26 @@
+package frontpress
+
+import com.gu.contentapi.client.ContentApiClient
+import com.gu.contentapi.client.model.SearchQuery
+import org.scalatest.flatspec._
+import org.scalatest.matchers.should.Matchers
+import org.scalatestplus.mockito.MockitoSugar
+
+class FaciaClientTest extends AsyncFlatSpec with Matchers with MockitoSugar {
+
+  "FAPI Client" should "send a CAPI client request without a runtime error like java.lang.NoSuchMethodError" in {
+    // The FAPI client uses the Content API client. If this test fails with a java.lang.NoSuchMethodError, the
+    // versions of FAPI client and CAPI client we are using are incompatible - the FAPI client will have been
+    // compiled against a different version of the CAPI client.
+
+    val mockContentApiClient = mock[ContentApiClient]
+
+    // This is only exercising the code to send the request, not recieve the result, but it's enough to trigger the
+    // java.lang.NoSuchMethodError seen in https://github.com/guardian/frontend/pull/25139#issuecomment-1163407402
+    noException shouldBe thrownBy(com.gu.facia.api.contentapi.ContentApi.getHydrateResponse(mockContentApiClient, Seq(
+      SearchQuery().tag("profile/roberto-tyley"),
+      SearchQuery().tag("stage/comedy")
+    )))
+  }
+
+}