IsFirstLetterUpperCaseTest

IsFirstLetterUpperCaseTest.java

import org.junit.Test;

import static org.junit.Assert.assertThat;
import static org.hamcrest.CoreMatchers.is;

public class IsFirstLetterUpperCaseTest {
    
    @Test
    public void testNullIsFirstLetterUpperCase() {
        assertThat(Boolean.FALSE, is(isFirstLetterUpperCase(null)));
    }

    @Test
    public void testUpperCaseIsFirstLetterUpperCase() {
        assertThat(Boolean.TRUE, is(isFirstLetterUpperCase("UpperCase")));
    }

    @Test
    public void testIsFirstLetterUpperCase() {
        assertThat(Boolean.FALSE, is(isFirstLetterUpperCase("lowerCase")));
    }

    @Test
    public void testNumberIsFirstLetterUpperCase() {
        assertThat(Boolean.FALSE, is(isFirstLetterUpperCase("55")));
    }
    
    public Boolean isFirstLetterUpperCase(final String text) {
        Boolean isUpperCase = false;
        if (text != null && !text.isEmpty()) {
            isUpperCase = Character.isUpperCase(text.charAt(0));
        }
        return isUpperCase;
    }
}