BorrowingFacadeSpec added

src/test/groovy/io/wkrzywiec/hexagonal/library/domain/borrowing/BorrowingFacadeSpec.groovy

@@ -0,0 +1,32 @@
+package io.wkrzywiec.hexagonal.library.domain.borrowing
+
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.BorrowingFacade
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.model.AvailableBook
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.model.MakeBookAvailableCommand
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.ports.outgoing.BorrowingEventPublisher
+import spock.lang.Specification
+
+class BorrowingFacadeSpec extends Specification {
+
+    private BorrowingFacade facade;
+    private InMemoryBorrowingDatabase database;
+    private BorrowingEventPublisher eventPublisher;
+
+    def setup(){
+        database = new InMemoryBorrowingDatabase();
+        eventPublisher = new BorrowingEventPublisherFake();
+        facade = new BorrowingFacade(database, eventPublisher);
+    }
+
+    def "Make a book available"(){
+
+        given: "prepare a command"
+        def command = new MakeBookAvailableCommand(100L)
+
+        when: "receive MakeBookAvailableCommand"
+        facade.handle(command)
+
+        then: "check database to have this book as available"
+        database.availableBooks[100L].idAsLong == new AvailableBook(100L).idAsLong
+    }
+}