Java 类android.support.test.espresso.core.deps.guava.base.Preconditions 实例源码

public KeyboardTypeAction add(String stringToBeTyped) {
  Preconditions.checkNotNull(stringToBeTyped);
  appendDescription(stringToBeTyped);

  for (char c : stringToBeTyped.toCharArray()) {
    if (c == '\n') {
      keysToBeHit.add(KeyLocations.instance().findSpecial(KeyEvent.KEYCODE_ENTER));
    } else {
      if (Character.isUpperCase(c)) {
        keysToBeHit.add(KeyLocations.instance().findSpecial(KeyEvent.KEYCODE_SHIFT_LEFT));
        c = Character.toLowerCase(c);
      }

      try {
        keysToBeHit.add(KeyLocations.instance().findStandard(c));
      } catch (IllegalStateException e) {
        if (fallbackToInjection) {
          Log.w(TAG, "Using fallback for " + c);

          keysToBeHit.add(KeyInfo.getFallbackKey("" + c));
        } else {
          throw e;
        }
      }
    }
  }

  return this;
}

/**
 * Assume visible area percentage.
 *
 * There is an bug on pre Android v11 versions where actionbar height can't be resolved when
 * using appcompat actionbar. This method use the appcompat actionbar height attribute when
 * on pre v11 versions.
 *
 * @see ViewMatchers#isDisplayingAtLeast(int)
 */
public static Matcher<View> isDisplayingAtLeast(final int areaPercentage) {
    Preconditions.checkState(areaPercentage <= 100, "Cannot have over 100 percent: %s", areaPercentage);
    Preconditions.checkState(areaPercentage > 0, "Must have a positive, non-zero value: %s", areaPercentage);
    return new IsDisplayingAtLeastMatcher(areaPercentage);
}