src/test/resources/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <style name="Theme.Robolectric" parent="@android:style/Theme">
    <item name="android:buttonStyle">@style/Widget.Robolectric.Button</item>
  </style>

  <style name="Theme.AnotherTheme" parent="@style/Theme.Robolectric">
    <item name="android:buttonStyle">@style/Widget.AnotherTheme.Button</item>
    <item name="logoWidth">?attr/averageSheepWidth</item>
    <item name="logoHeight">?android:attr/listItemPreferredHeight</item>
    <item name="averageSheepWidth">42px</item>
    <item name="animalStyle">@style/Gastropod</item>
    <item name="typeface">custom_font</item>
  </style>

  <style name="Theme.ThirdTheme" parent="@style/Theme.Robolectric">
    <item name="snail">@style/Gastropod</item>
    <item name="animalStyle">?attr/snail</item>
  </style>

  <style name="Theme.MyTheme" parent=""/>

  <style name="Widget.Robolectric.Button" parent="@android:style/Widget.Button">
    <item name="android:background">#ff00ff00</item>
  </style>

  <style name="Widget.AnotherTheme.Button" parent="@android:style/Widget.Button">
    <item name="android:background">#ffff0000</item>
    <item name="android:minWidth">?attr/logoWidth</item>
    <item name="android:minHeight">?attr/logoHeight</item>
  </style>

  <style name="Widget.AnotherTheme.Button.Blarf"/>

  <style name="MyCustomView">
    <item name="aspectRatioEnabled">true</item>
  </style>

  <style name="Sized">
    <item name="android:layout_width">42px</item>
    <item name="android:layout_height">42px</item>
  </style>

  <style name="Gastropod">
      <item name="aspectRatio">1.69</item>
  </style>

  <style name="MyBlackTheme">
    <item name="android:windowBackground">@android:color/black</item>
    <item name="android:textColorHint">@android:color/darker_gray</item>
  </style>

  <style name="MyBlueTheme">
    <item name="android:windowBackground">@color/blue</item>
    <item name="android:textColor">@color/white</item>
  </style>

  <style name="IndirectButtonStyle" parent="@android:attr/buttonStyle">
    <item name="android:minHeight">12dp</item>
  </style>

</resources>