Add NricMatchesPredicateTest class

src/test/java/seedu/address/model/person/NricMatchesPredicateTest.java

@@ -0,0 +1,60 @@
+package seedu.address.model.person;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.testutil.PersonBuilder;
+
+public class NricMatchesPredicateTest {
+
+    @Test
+    public void equals() {
+        String firstNric = "S1234567A";
+        String secondNric = "S7654321Z";
+
+        NricMatchesPredicate firstPredicate = new NricMatchesPredicate(firstNric);
+        NricMatchesPredicate secondPredicate = new NricMatchesPredicate(secondNric);
+
+        // Same object -> returns true
+        assertTrue(firstPredicate.equals(firstPredicate));
+
+        // Same NRIC -> returns true
+        NricMatchesPredicate firstPredicateCopy = new NricMatchesPredicate(firstNric);
+        assertTrue(firstPredicate.equals(firstPredicateCopy));
+
+        // Different types -> returns false
+        assertFalse(firstPredicate.equals(1));
+
+        // Null -> returns false
+        assertFalse(firstPredicate.equals(null));
+
+        // Different NRIC -> returns false
+        assertFalse(firstPredicate.equals(secondPredicate));
+    }
+
+    @Test
+    public void test_nricMatches_returnsTrue() {
+        NricMatchesPredicate predicate = new NricMatchesPredicate("S1234567A");
+        Person person = new PersonBuilder().withNric("S1234567A").build();
+
+        assertTrue(predicate.test(person));
+    }
+
+    @Test
+    public void test_nricMatches_caseInsensitive_returnsTrue() {
+        NricMatchesPredicate predicate = new NricMatchesPredicate("s1234567a");
+        Person person = new PersonBuilder().withNric("S1234567A").build();
+
+        assertTrue(predicate.test(person));
+    }
+
+    @Test
+    public void test_nricDoesNotMatch_returnsFalse() {
+        NricMatchesPredicate predicate = new NricMatchesPredicate("S0000000X");
+        Person person = new PersonBuilder().withNric("S1234567A").build();
+
+        assertFalse(predicate.test(person));
+    }
+}