尝试膨胀具有TextInputLayout的布局时，robolectric测试失败 科特林实施 Java实现

问题描述

Android Studio 4.0.1
Robolectric 4.3.1

我正在编写自动机械测试，该测试将失败，并显示以下错误。似乎与无法夸大的TextInputLayout有关。如果我删除TextInputLayout，则测试将通过。

这是我收到的错误消息。

android.view.InflateException: Binary XML file line #47: Binary XML file line #47: Error inflating class com.google.android.material.textfield.TextInputLayout
Caused by: android.view.InflateException: Binary XML file line #47: Error inflating class com.google.android.material.textfield.TextInputLayout
Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.AppCompat (or a descendant).

测试类本身

@Config(sdk = [Build.VERSION_CODES.O_MR1])
@RunWith(AndroidJUnit4::class)
class CharitiesAdapterTest {

    private lateinit var charitiesAdapter: CharitiesAdapter

    @Before
    fun setUp() {
        charitiesAdapter = CharitiesAdapter()
    }

    @Test
    fun `should create viewHolder`() {
        // Act & Assert
        assertThat(createViewHolder()).isNotNull
    }

    private fun createViewHolder(): CharitiesViewHolder {
        val constraintLayout = ConstraintLayout(ApplicationProvider.getApplicationContext())

        return charitiesAdapter.onCreateViewHolder(constraintLayout,0)
    }
}

正在测试的实际适配器

class CharitiesAdapter : RecyclerView.Adapter<CharitiesViewHolder>() {

    private val charitiesList: MutableList<Charity> = mutableListOf()
    private var selectedCharity: (Charity) -> Unit = {}

    override fun onCreateViewHolder(parent: ViewGroup,viewType: Int): CharitiesViewHolder {
        val charitiesViewHolder = CharitiesViewHolder(
            LayoutInflater.from(parent.context).inflate(R.layout.charity_item,parent,false))

        return charitiesViewHolder
    }

    override fun getItemCount(): Int = charitiesList.count()

    override fun onBindViewHolder(holder: CharitiesViewHolder,position: Int) {
        // left blank
    }
}

这是布局中出现问题的部分。仅删除TextInputLayout时，测试将通过OK

 <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/textInputLayoutPostcode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/ivLogo">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/editTextPostcode"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </com.google.android.material.textfield.TextInputLayout>
    

这是我正在使用的样式

    <resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
</resources>

谢谢您的建议

解决方法

您可以将测试配置为使用使用应用程序主题的模拟应用程序，如下所示：

科特林实施

class TestApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        setTheme(R.style.AppTheme) //or just R.style.Theme_AppCompat
    }
}

然后将您的测试配置为使用此模拟应用程序

@Config(application=TestApplication::class,sdk = [Build.VERSION_CODES.O_MR1])
@RunWith(AndroidJUnit4::class)
class CharitiesAdapterTest {

Java实现

public class TestApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        setTheme(R.style.AppTheme); //or just R.style.Theme_AppCompat
    }
}

然后将您的测试配置为使用此模拟应用程序

@Config(application=TestApplication.class,sdk = [Build.VERSION_CODES.O_MR1])
@RunWith(AndroidJUnit4.class)
class CharitiesAdapterTest {

,

您传递了错误的Context类：ApplicationProvider.getApplicationContext()。

ApplicationContext根本没有主题，使用了Activity建议的Context（无论哪个{{1} }或Activity。根据提供的代码，您不清楚如何启动Activity（应该可以访问Theme）。

使用ActivityScenario或ActivityScenarioRule进行测试可能是正确的方法。
文档显示了AndroidX Test和JUnit4 rules with AndroidX Test的工作方式。 / p>