/*
 * Copyright 2017, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package org.spine3.examples.todolist.validator;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

import java.text.SimpleDateFormat;
import java.util.Locale;

import static com.google.common.base.Preconditions.checkNotNull;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * @author Illia Shepilov
 */
@DisplayName("DueDateValidator should")
class DueDateValidatorTest {

    private DueDateValidator validator;

    @BeforeEach
    void setUp() {
        final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
        validator = new DueDateValidator(dateFormat);
    }

    @Test
    @DisplayName("pass the validation")
    public void passValidation() {
        final boolean passed = validator.validate("2017-02-22");
        assertTrue(passed);
    }

    @Test
    @DisplayName("not pass the validation when validated value is null")
    public void notPassValidationWhenInputIsNull() {
        final boolean passed = validator.validate(null);
        assertFalse(passed);
    }

    @Test
    @DisplayName("not pass the validation when validated value is empty")
    public void notPassValidationWhenInputIsEmpty() {
        final boolean passed = validator.validate("");
        assertFalse(passed);
    }

    @Test
    @DisplayName("not pass the validation when passed value has incorrect format")
    public void notPassTheValidationWhenInputHasIncorrectFormat() {
        final boolean passed = validator.validate("2017:02:22");
        assertFalse(passed);
    }

    @Test
    @DisplayName("return non null message when validation is failed")
    public void getMessage() {
        validator.validate(null);
        checkNotNull(validator.getMessage());
    }
}

@@ -1257,57 +1257,52 @@
 tic 
-com.google.common.base.Preconditions.checkNotNull
+org.junit.jupiter.api.Assertions.assertFalse
 ;%0Aim
@@ -1344,37 +1344,39 @@
 ssertions.assert
-False
+NotNull
 ;%0Aimport static 
@@ -2825,13 +2825,14 @@
     
-check
+assert
 NotN

Fix test in the `DueDateValidatorTest` class.