#854 NullPointer during login attempt - Added some unit tests

import androidx.core.util.Pair;

import androidx.test.ext.junit.runners.AndroidJUnit4;

import org.junit.Rule;

import org.junit.Test;

import org.junit.rules.ExpectedException;

import org.junit.runner.RunWith;

import java.util.ArrayList;

            );

        }

    }

    @Rule

    public final ExpectedException exception = ExpectedException.none();

    @Test

    public void testGetCleanHexaColorString() {

        final List<Pair<String, String>> validColors = new ArrayList<>();

        validColors.add(new Pair<>("#0082C9", "#0082C9"));

        validColors.add(new Pair<>("0082C9", "#0082C9"));

        validColors.add(new Pair<>("#CCC", "#CCCCCC"));

        validColors.add(new Pair<>("ccc", "#cccccc"));

        validColors.add(new Pair<>("af0", "#aaff00"));

        validColors.add(new Pair<>("#af0", "#aaff00"));

        for (Pair<String, String> color : validColors) {

            assertEquals("Expect " + color.first + " to be cleaned up to " + color.second, color.second, ColorUtil.formatColorToParsableHexString(color.first));

        }

        final String[] invalidColors = new String[]{null, "", "cc", "c", "#a", "#55L", "55L"};

        for (String color : invalidColors) {

            exception.expect(IllegalArgumentException.class);

            ColorUtil.formatColorToParsableHexString(color);

        }

    }

}