#31 - Throw useful error when Gradle + IDEA setup issue detected

Author: rbygrave

pom.xml

@@ -50,7 +50,7 @@
     <dependency>
       <groupId>io.dinject</groupId>
       <artifactId>dinject-generator</artifactId>
-      <version>1.9</version>
+      <version>1.10</version>
       <scope>test</scope>
     </dependency>
 

src/main/java/io/dinject/BootContext.java

@@ -356,6 +356,11 @@ public BeanContext load() {
     ServiceLoader.load(BeanContextFactory.class).forEach(factoryOrder::add);
 
     Set<String> moduleNames = factoryOrder.orderFactories();
+    if (moduleNames.isEmpty()) {
+      throw new IllegalStateException("No modules found suggests using Gradle and IDEA but with a setup issue?" +
+        " Review IntelliJ Settings / Build / Build tools / Gradle - 'Build and run using' value and set that to 'Gradle'. " +
+        " Refer to https://dinject.io/docs/gradle#idea");
+    }
     log.debug("building context with modules {}", moduleNames);
 
     Builder rootBuilder = BuilderFactory.newRootBuilder(suppliedBeans, enrichBeans);

src/test/java/org/example/coffee/BootContextAddTest.java

@@ -10,7 +10,7 @@
 
 public class BootContextAddTest {
 
-  @Test
+  @Test(expected = IllegalStateException.class)
   public void withModules_exludingThisOne() {
 
     TDPump testDoublePump = new TDPump();