• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (C) 2020 The Dagger Authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package dagger.hilt.android.internal.testing;
18 
19 import java.lang.reflect.InvocationTargetException;
20 
21 /** Stores the {@link TestComponentData} for a Hilt test class. */
22 public abstract class TestComponentDataSupplier {
23 
24   /** Returns a {@link TestComponentData}. */
get()25   protected abstract TestComponentData get();
26 
get(Class<?> testClass)27   static TestComponentData get(Class<?> testClass) {
28     String generatedClassName = getEnclosedClassName(testClass) + "_TestComponentDataSupplier";
29     try {
30       return Class.forName(generatedClassName)
31           .asSubclass(TestComponentDataSupplier.class)
32           .getDeclaredConstructor()
33           .newInstance()
34           .get();
35     // We catch each individual exception rather than using a multicatch because multi-catch will
36     // get compiled to the common but new super type ReflectiveOperationException, which is not
37     // allowed on API < 19. See b/187826710.
38     } catch (ClassNotFoundException e) {
39       throw new RuntimeException(errorMessage(testClass, generatedClassName), e);
40     } catch (NoSuchMethodException e) {
41       throw new RuntimeException(errorMessage(testClass, generatedClassName), e);
42     } catch (IllegalAccessException e) {
43       throw new RuntimeException(errorMessage(testClass, generatedClassName), e);
44     } catch (InstantiationException e) {
45       throw new RuntimeException(errorMessage(testClass, generatedClassName), e);
46     } catch (InvocationTargetException e) {
47       throw new RuntimeException(errorMessage(testClass, generatedClassName), e);
48     }
49   }
50 
errorMessage(Class<?> testClass, String generatedClassName)51   private static String errorMessage(Class<?> testClass, String generatedClassName) {
52     return String.format(
53         "Hilt test, %s, is missing generated file: %s. Check that the test class is "
54             + " annotated with @HiltAndroidTest and that the processor is running over your"
55             + " test.",
56         testClass.getSimpleName(),
57         generatedClassName);
58   }
59 
getEnclosedClassName(Class<?> testClass)60   private static String getEnclosedClassName(Class<?> testClass) {
61     StringBuilder sb = new StringBuilder();
62     Class<?> currClass = testClass;
63     while (currClass != null) {
64       Class<?> enclosingClass = currClass.getEnclosingClass();
65       if (enclosingClass != null) {
66         sb.insert(0, "_" + currClass.getSimpleName());
67       } else {
68         sb.insert(0, currClass.getCanonicalName());
69       }
70       currClass = enclosingClass;
71     }
72     return sb.toString();
73   }
74 }
75