Add correct Company aggregate test

Add correct Company aggregate test

#28

companies/src/test/java/org/axonframework/samples/trader/company/command/CompanyTest.java

@@ -0,0 +1,39 @@
+package org.axonframework.samples.trader.company.command;
+
+import org.axonframework.samples.trader.api.company.*;
+import org.axonframework.samples.trader.api.orders.OrderBookId;
+import org.axonframework.samples.trader.api.users.UserId;
+import org.axonframework.test.aggregate.AggregateTestFixture;
+import org.junit.Before;
+import org.junit.Test;
+
+public class CompanyTest {
+
+    private AggregateTestFixture<Company> fixture;
+
+    private CompanyId companyId = new CompanyId();
+    private OrderBookId orderBookId = new OrderBookId();
+
+    private CompanyCreatedEvent companyCreatedEvent;
+
+    @Before
+    public void setUp() {
+        fixture = new AggregateTestFixture<>(Company.class);
+
+        companyCreatedEvent = new CompanyCreatedEvent(companyId, "TestItem", 1000L, 10000L);
+    }
+
+    @Test
+    public void testCreateCompany() {
+        fixture.givenNoPriorActivity()
+               .when(new CreateCompanyCommand(companyId, new UserId(), "TestItem", 1000L, 10000L))
+               .expectEvents(companyCreatedEvent);
+    }
+
+    @Test
+    public void testAddOrderBookToCompany() {
+        fixture.given(companyCreatedEvent)
+               .when(new AddOrderBookToCompanyCommand(companyId, orderBookId))
+               .expectEvents(new OrderBookAddedToCompanyEvent(companyId, orderBookId));
+    }
+}