1 /*
2  * Copyright (C) 2023 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.functional.kotlinsrc.subcomponent
18 
19 import dagger.Component
20 import dagger.Module
21 import dagger.Provides
22 import dagger.Subcomponent
23 import org.junit.Assert
24 import org.junit.Test
25 import org.junit.runner.RunWith
26 import org.junit.runners.JUnit4
27 
28 /** Tests for subcomponent factory methods. */
29 @RunWith(JUnit4::class)
30 class SubcomponentFactoryMethodTest {
31   @Module
32   internal class IntModule {
provideIntnull33     @Provides fun provideInt(): Int = 42
34   }
35 
36   @Module
37   internal class StringModule(val s: String) {
38     @Provides fun provideString(i: Int): String = s + i
39   }
40 
41   @Component(modules = [IntModule::class])
42   internal interface TestComponent {
newSubcomponentnull43     fun newSubcomponent(stringModule: StringModule?): TestSubcomponent
44   }
45 
46   @Subcomponent(modules = [StringModule::class])
47   internal interface TestSubcomponent {
48     fun string(): String
49   }
50 
51   @Test
creatingSubcomponentViaFactoryMethod_failsForNullParameternull52   fun creatingSubcomponentViaFactoryMethod_failsForNullParameter() {
53     val component: TestComponent = DaggerSubcomponentFactoryMethodTest_TestComponent.create()
54     try {
55       component.newSubcomponent(null)
56       Assert.fail()
57     } catch (expected: NullPointerException) {}
58   }
59 }
60