Question

   /**
   * Returns true if and only if each string in the supplied list of strings
   * starts with an uppercase letter. If the list is empty, returns false.
   *
   * @param l a non-null list of strings
   * @return true iff each string starts with an uppercase letter
   */
   public static boolean allCapitalizedWords(List<String> l) {
  
   }

Here are the tests:

@Test
   public void testAllCapitalizedWordsEmptyList() {
       assertFalse(ListExercises.allCapitalizedWords(Arrays.asList()));
   }

   @Test
   public void testAllCapitalizedWordsEmptyString() {
       assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("")));
   }

   @Test
   public void testAllCapitalizedWordsThreeStringsFalse1() {
       assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "qwer")));
   }

   @Test
   public void testAllCapitalizedWordsThreeStringsFalse2() {
       assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "!@#$")));
   }

   @Test
   public void testAllCapitalizedWordsThreeStringsFalse3() {
       assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "", "Jkl;")));
   }

   @Test
   public void testAllCapitalizedWordsOneStringTrue() {
       assertTrue(ListExercises.allCapitalizedWords(Arrays.asList("Asdf")));
   }

   @Test
   public void testAllCapitalizedWordsThreeStringsTrue() {
       assertTrue(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "Qwer")));
   }

Answer 1

Code(Text Format):

import java.io.*;
import java.util.*;
import java.lang.Object;
import org.junit.Test;
import static org.junit.Assert.*;
class ListExercises {
/*allCapitalizedWords(List<String>)
1: If the list is empty, then return false
2: Now iterate over each string in list
   2.a: If the string is a empty string(i.e. ""), then return false
2.b: If the character at 0th index is not uppercase, then return false
2.c: If all string got checked and false is not returned, then return true at the end
*/
public static boolean allCapitalizedWords(List<String> l) {
if(l.size() == 0)
return false;
//declaring a iterator for the list through which the list can be iterated
ListIterator<String> itr = l.listIterator();
while(itr.hasNext()){
String str = itr.next();
if(str.length() == 0){
return false;
}
if(str.charAt(0) < 'A' || str.charAt(0) > 'Z'){
return false;
}
}
return true;
}
  
@Test
public void testAllCapitalizedWordsEmptyList() {
assertFalse(ListExercises.allCapitalizedWords(Arrays.asList()));
}

@Test
public void testAllCapitalizedWordsEmptyString() {
assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("")));
}

@Test
public void testAllCapitalizedWordsThreeStringsFalse1() {
assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "qwer")));
}

@Test
public void testAllCapitalizedWordsThreeStringsFalse2() {
assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "!@#$")));
}

@Test
public void testAllCapitalizedWordsThreeStringsFalse3() {
assertFalse(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "", "Jkl;")));
}

@Test
public void testAllCapitalizedWordsOneStringTrue() {
assertTrue(ListExercises.allCapitalizedWords(Arrays.asList("Asdf")));
}

@Test
public void testAllCapitalizedWordsThreeStringsTrue() {
assertTrue(ListExercises.allCapitalizedWords(Arrays.asList("Asdf", "Jkl;", "Qwer")));
}
public static void main(String[] args) {
ListExercises obj = new ListExercises();
obj.testAllCapitalizedWordsEmptyList();
obj.testAllCapitalizedWordsEmptyString();
obj.testAllCapitalizedWordsThreeStringsFalse1();
obj.testAllCapitalizedWordsThreeStringsFalse2();
obj.testAllCapitalizedWordsThreeStringsFalse3();
obj.testAllCapitalizedWordsOneStringTrue();
obj.testAllCapitalizedWordsThreeStringsTrue();

}
}

Output (on provided test cases):

Completed with exit code: 0