Add FindFreeTime test case

docs/UserGuide.md

@@ -76,6 +76,8 @@ This guide explains how you can use ProjectPRO to add contacts and manage your g
 Here are some annotations used in this guide:
 
 
+
+
 <p></p>
 <div style="border-left: 4px solid #56494C; background-color: #F1DEC6; color: #000; padding: 10px; margin: 5px 0; border-radius: 6px;">
   <h5 style="color: #56494C; margin: 0 0 5px 0; padding: 0;"> :heavycheckmark: Acceptable values</h5>
@@ -619,12 +621,14 @@ You list all available time slots of your contacts.
 - Provide the full name of the contact using the `n/` prefix.
 <p></p>
 <div style="border-left: 4px solid #56494C; background-color: #F1DEC6; color: #000; padding: 10px; margin: 5px 0; border-radius: 6px;">
-  <h3 style="color: #56494C; margin: 0 0 5px 0; padding: 0;">Acceptable values</h3>
-  <p style="color: #000; margin: 8px 0;"><code style="color: #555; background-color: #F0C481; padding: 2px; border-radius: 2px;">NAME</code>
+  <h4 style="color: #56494C; margin: 0 0 5px 0; padding: 0;">Acceptable values</h4>
+  <p style="font-size:9px; color: #000; margin: 8px 0;"><code style="color: #555; background-color: #F0C481; padding: 2px; border-radius: 2px;">NAME</code> 
     must be alphanumeric and cannot be blank.</p>
 </div>
+
 <p></p>
 
+
 **Example(s):**
 - `listtime n/Alex Yeoh`
   This lists all time slots when Alex Yeoh is available from your contact list.

src/main/java/seedu/address/logic/commands/FindFreeTimeCommand.java

@@ -79,22 +79,24 @@ public boolean equals(Object other) {
         }
 
         // instanceof handles nulls
-        if (!(other instanceof GroupPersonCommand)) {
+        if (!(other instanceof FindFreeTimeCommand)) {
             return false;
         }
 
-        GroupPersonCommand otherGroupPersonCommand = (GroupPersonCommand) other;
+        FindFreeTimeCommand otherFindFreeTimeCommand = (FindFreeTimeCommand) other;
         // to check
-        return this.equals(otherGroupPersonCommand);
+        return this.duration.getDurationInMin() == otherFindFreeTimeCommand.duration.getDurationInMin()
+                && this.groupName.equals(otherFindFreeTimeCommand.groupName);
 
     }
 
     // to fix
     @Override
-    public java.lang.String toString() {
+    public String toString() {
         return new ToStringBuilder(this)
-            .add("toAddToGroup", "")
-            .toString();
+               .add("group name", groupName)
+               .add("duration", duration.toString())
+               .toString();
     }
 }
 

src/main/java/seedu/address/model/Duration.java

@@ -19,4 +19,9 @@ public int getDurationInMin() {
         return this.duration;
     }
 
+    public String toString() {
+        return Integer.toString(duration);
+    }
+
+
 }

src/main/java/seedu/address/model/group/Group.java

@@ -231,6 +231,7 @@ public TimeIntervalList findFreeTime(Duration duration) throws CommandException
                 freeTime = freeTime.findOverlap(second, duration);
             }
         }
+
         return freeTime;
     }
 

src/test/java/seedu/address/logic/commands/CommandTestUtil.java

@@ -3,6 +3,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_ADDRESS;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_DURATION;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_EMAIL;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_FREETIME;
 import static seedu.address.logic.parser.CliSyntax.PREFIX_GROUPREMARK;
@@ -95,6 +96,20 @@ public class CommandTestUtil {
     public static final String VALID_GROUP_REMARK_OTHERS = "gU4&😊!";
     public static final String GROUP_REMARK_OTHERS_DESC = " " + PREFIX_GROUPREMARK + VALID_GROUP_REMARK_OTHERS;
 
+    public static final String DURATION_THIRTY = "30";
+    public static final String VALID_DURATION_THIRTY = " " + PREFIX_DURATION + DURATION_THIRTY;
+    public static final String INVALID_DURATION_NEGATIVE = "-1";
+    public static final String INVALID_DURATION_NEGATIVE_DESC = " " + PREFIX_DURATION + INVALID_DURATION_NEGATIVE;
+    public static final String INVALID_DURATION_ZERO = "0";
+    public static final String INVALID_DURATION_ZERO_DESC = " " + PREFIX_DURATION + INVALID_DURATION_ZERO;
+    public static final String INVALID_DURATION_MAX = "10080";
+    public static final String INVALID_DURATION_MAX_DESC = " " + PREFIX_DURATION + INVALID_DURATION_MAX;
+
+    public static final String INVALID_DURATION_CHAR = "aaa";
+    public static final String INVALID_DURATION_CHAR_DESC = " " + PREFIX_DURATION + INVALID_DURATION_CHAR;
+
+
+
 
 
     /**