instrument: add helper method for snackbar checking

OpenKeychain/src/androidTest/java/org/sufficientlysecure/keychain/actions/CustomMatchers.java

@@ -0,0 +1,27 @@
+package org.sufficientlysecure.keychain.actions;
+
+
+import android.support.annotation.ColorRes;
+import android.support.test.espresso.matcher.BoundedMatcher;
+import android.view.View;
+
+import com.nispok.snackbar.Snackbar;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+
+public abstract class CustomMatchers {
+
+    public static Matcher<View> withSnackbarLineColor(@ColorRes final int colorRes) {
+        return new BoundedMatcher<View, Snackbar>(Snackbar.class) {
+            public void describeTo(Description description) {
+                description.appendText("with color resource id: " + colorRes);
+            }
+
+            @Override
+            public boolean matchesSafely(Snackbar snackbar) {
+                return snackbar.getResources().getColor(colorRes) == snackbar.getLineColor();
+            }
+        };
+    }
+
+}

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/Notify.java

@@ -38,25 +38,16 @@ import org.sufficientlysecure.keychain.util.FabContainer;
 public class Notify {
 
     public static enum Style {
-        OK, WARN, ERROR;
+        OK (R.color.android_green_light), WARN(R.color.android_orange_light), ERROR(R.color.android_red_light);
+
+        public final int mLineColor;
+
+        Style(int color) {
+            mLineColor = color;
+        }
 
         public void applyToBar(Snackbar bar) {
-
+            bar.lineColorResource(mLineColor);
-            switch (this) {
-                case OK:
-                    // bar.actionColorResource(R.color.android_green_light);
-                    bar.lineColorResource(R.color.android_green_light);
-                    break;
-                case WARN:
-                    // bar.textColorResource(R.color.android_orange_light);
-                    bar.lineColorResource(R.color.android_orange_light);
-                    break;
-                case ERROR:
-                    // bar.textColorResource(R.color.android_red_light);
-                    bar.lineColorResource(R.color.android_red_light);
-                    break;
-            }
-
         }
     }