shadows/framework/src/main/java/org/robolectric/shadows/ShadowContentResolver.java
@Implementation
  protected final int bulkInsert(Uri url, ContentValues[] values) {
    ContentProvider provider = getProvider(url);

    InsertStatement insertStatement = new InsertStatement(url, provider, values);
    statements.add(insertStatement);
    insertStatements.add(insertStatement);

    if (provider != null) {
      return provider.bulkInsert(url, values);
    } else {
      return values.length;
    }
  }
@Implementation
  protected final int bulkInsert(Uri url, ContentValues[] values) {
    ContentProvider provider = getProvider(url);

    InsertStatement insertStatement = new InsertStatement(url, provider, values);
    statements.add(insertStatement);
    insertStatements.add(insertStatement);

    if (provider != null) {
      return provider.bulkInsert(url, values);
    } else {
      return values.length;
    }
  }
If a {@link ContentProvider} is registered for the given {@link Uri}, its {@link
ContentProvider#bulkInsert(Uri, ContentValues[])} method will be invoked.

<p>Tests can verify that this method was called using {@link #getStatements()} or {@link
#getInsertStatements()}.

<p>If no appropriate {@link ContentProvider} is found, no action will be taken and the number
of rows in {@code values} will be returned.