Robolectric InflateException quando si utilizza libreria di supporto v7 AlertDialog

Question

con un normale android.app.AlertDialog opere con ShadowAlertDialog.getLatestAlertDialog(), ma se si utilizza una libreria di supporto android.support.v7.app.AlertDialog, quindi questa eccezione accade:

android.view.InflateException: XML file app/build/intermediates/res/qa/debug/layout/abc_alert_dialog_material.xml line #-1 (sorry, not yet implemented): Error inflating class android.support.v7.internal.widget.DialogTitle 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.inflate(CalligraphyLayoutInflater.java:60) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249) 
    at android.support.v7.app.AppCompatDialog.setContentView(AppCompatDialog.java:75) 
    at android.support.v7.app.AlertController.installContent(AlertController.java:216) 
    at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:240) 
    at android.app.Dialog.dispatchOnCreate(Dialog.java:361) 
    at android.app.Dialog.show(Dialog.java:262) 
    at org.robolectric.shadows.ShadowDialog.show(ShadowDialog.java:65) 
    at android.app.Dialog.show(Dialog.java) 
<snip> 
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -9 
    at java.lang.String.substring(String.java:1955) 
    at org.robolectric.res.ResName.qualifyResName(ResName.java:51) 
    at org.robolectric.res.Attribute.getStyleReference(Attribute.java:147) 
    at org.robolectric.res.builder.XmlFileBuilder$XmlResourceParserImpl.getResourceId(XmlFileBuilder.java:789) 

Questo è un problema noto, ma qual è la migliore modo di risolvere il problema?
https://github.com/robolectric/robolectric/issues/1736

Answer 1

Io uso un programma di utilità statica per costruire la mia AlertDialog oggetti, e ho costruire un android.app.AlertDialog uno quando rilevo Robolectric nel classpath. Ecco il mio codice:

private static Boolean isRobolectricTest = null; 

/** 
* Determines if we are running inside of Robolectric or not. 
*/ 
public static boolean isARobolectricUnitTest() { 
    if (isRobolectricTest == null) { 
     try { 
      Class.forName("org.robolectric.Robolectric"); 
      isRobolectricTest = true; 
     } catch (ClassNotFoundException e) { 
      isRobolectricTest = false; 
     } 
    } 
    return isRobolectricTest; 
} 

/** 
* This utility helps us to workaround a Robolectric issue that causes our unit tests to fail 
* when an Activity/Fragment creates an AlertDialog using the v7 support library. The 
* workaround is to use the normal android.app.AlertDialog when running Robolectric tests. 
* 
* The Robolectric bug is: https://github.com/robolectric/robolectric/issues/1736 
* android.view.InflateException: XML file app/build/intermediates/res/qa/debug/layout/abc_alert_dialog_material.xml line #-1 (sorry, not yet implemented): Error inflating class android.support.v7.internal.widget.DialogTitle 
*/ 
public static DialogInterface createAndShowDialog(Context context, 
                @StringRes int titleResId, 
                String message, 
                @StringRes int negativeTextResId, 
                DialogInterface.OnClickListener negativeClickListener, 
                @StringRes int neutralTextResId, 
                DialogInterface.OnClickListener neutralClickListener, 
                @StringRes int positiveTextResId, 
                DialogInterface.OnClickListener positiveClickListener, 
                boolean cancelable) { 
    if (isARobolectricUnitTest()) { 
     return UiUtils.createDialog(context, titleResId, message, negativeTextResId, negativeClickListener, neutralTextResId, neutralClickListener, positiveTextResId, positiveClickListener, cancelable); 
    } else { 
     return UiUtils.createDialogSupportV7(context, titleResId, message, negativeTextResId, negativeClickListener, neutralTextResId, neutralClickListener, positiveTextResId, positiveClickListener, cancelable); 
    } 
} 

private static android.app.AlertDialog createDialog(Context context, 
                @StringRes int titleResId, 
                String message, 
                @StringRes int negativeTextResId, 
                DialogInterface.OnClickListener negativeClickListener, 
                @StringRes int neutralTextResId, 
                DialogInterface.OnClickListener neutralClickListener, 
                @StringRes int positiveTextResId, 
                DialogInterface.OnClickListener positiveClickListener, 
                boolean cancelable) { 
    android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(context); 
    builder.setTitle(titleResId); 
    builder.setMessage(message); 
    builder.setNegativeButton(negativeTextResId, negativeClickListener); 

    if ((neutralTextResId != -1) && (neutralClickListener != null)) { 
     builder.setNeutralButton(neutralTextResId, neutralClickListener); 
    } 

    builder.setPositiveButton(positiveTextResId, positiveClickListener); 
    builder.setCancelable(cancelable); 

    android.app.AlertDialog alertDialog = builder.create(); 
    alertDialog.show(); 

    return alertDialog; 
} 

private static android.support.v7.app.AlertDialog createDialogSupportV7(Context context, 
                     @StringRes int titleResId, 
                     String message, 
                     @StringRes int negativeTextResId, 
                     DialogInterface.OnClickListener negativeClickListener, 
                     @StringRes int neutralTextResId, 
                     DialogInterface.OnClickListener neutralClickListener, 
                     @StringRes int positiveTextResId, 
                     DialogInterface.OnClickListener positiveClickListener, 
                     boolean cancelable) { 
    android.support.v7.app.AlertDialog.Builder builder = new android.support.v7.app.AlertDialog.Builder(context); 
    builder.setTitle(titleResId); 
    builder.setMessage(message); 
    builder.setNegativeButton(negativeTextResId, negativeClickListener); 

    if ((neutralTextResId != -1) && (neutralClickListener != null)) { 
     builder.setNeutralButton(neutralTextResId, neutralClickListener); 
    } 

    builder.setPositiveButton(positiveTextResId, positiveClickListener); 
    builder.setCancelable(cancelable); 

    android.support.v7.app.AlertDialog alertDialog = builder.create(); 
    alertDialog.show(); 

    return alertDialog; 
} 

Non è l'ideale, ma fa il lavoro, ed è facile da rimuovere l'hack più tardi, quando il problema è stato risolto Robolectric.