add vertical line feature and rename previous methods

Author: albadc

src/main/java/edu/thoughtworks/training/Asterisk.java

@@ -4,17 +4,19 @@ public class Asterisk {
 
  private static final String ASTERISK = "*";
 
- public String print() {
+ public String printAnAsterisk() {
  return ASTERISK;
  }
 
- public String print(int n) {
+ public String printHorizontalLine(int n) {
  StringBuilder builder = new StringBuilder();
- for (int i=0; i<n; ++i) builder.append(print());
+ for (int i = 0; i < n; ++i) builder.append(printAnAsterisk());
  return builder.toString();
  }
 
  public String printVerticalLine(int n) {
- return null;
+ StringBuilder builder = new StringBuilder();
+ for (int i = 0; i < n; ++i) builder.append(printAnAsterisk()).append("\n");
+ return builder.toString();
  }
 }

src/test/java/edu/thoughtworks/training/AsteriskShould.java

@@ -8,14 +8,14 @@ public class AsteriskShould {
  @Test
  public void printAnAsterisk() {
  Asterisk asterisk = new Asterisk();
- assertEquals("Asterisk is not returning an asterisk", "*", asterisk.print());
+ assertEquals("Asterisk is not returning an asterisk", "*", asterisk.printAnAsterisk());
  }
 
  @Test
  public void printANumberOfAsterisk() {
  Asterisk asterisk = new Asterisk();
  int n = 6;
- assertEquals("Asterisk prints less than two asterisks", "******", asterisk.print(n));
+ assertEquals("Asterisk prints less than two asterisks", "******", asterisk.printHorizontalLine(n));
  }
 
  @Test