diff --git a/src/test/java/com/thealgorithms/others/CRCAlgorithmTest.java b/src/test/java/com/thealgorithms/others/CRCAlgorithmTest.java
index a581a35bf963..542c256a3e88 100644
--- a/src/test/java/com/thealgorithms/others/CRCAlgorithmTest.java
+++ b/src/test/java/com/thealgorithms/others/CRCAlgorithmTest.java
@@ -1,29 +1,82 @@
-
package com.thealgorithms.others;
import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.Test;
public class CRCAlgorithmTest {
@Test
- void test1() {
+ void testNoErrorsWithZeroBER() {
CRCAlgorithm c = new CRCAlgorithm("10010101010100101010010000001010010101010", 10, 0.0);
-
- // A bit-error rate of 0.0 should not provide any wrong messages
- c.changeMess();
+ c.generateRandomMess();
c.divideMessageWithP(false);
- assertEquals(c.getWrongMess(), 0);
+ c.changeMess();
+ c.divideMessageWithP(true);
+ assertEquals(0, c.getWrongMess(), "BER=0 should produce no wrong messages");
+ assertEquals(0, c.getWrongMessCaught(), "No errors, so no caught wrong messages");
+ assertEquals(0, c.getWrongMessNotCaught(), "No errors, so no uncaught wrong messages");
+ assertTrue(c.getCorrectMess() > 0, "Should have some correct messages");
}
@Test
- void test2() {
+ void testAllErrorsWithBEROne() {
CRCAlgorithm c = new CRCAlgorithm("10010101010100101010010000001010010101010", 10, 1.0);
+ c.generateRandomMess();
+ c.divideMessageWithP(false);
+ c.changeMess();
+ c.divideMessageWithP(true);
+ assertTrue(c.getWrongMess() > 0, "BER=1 should produce wrong messages");
+ assertEquals(0, c.getCorrectMess(), "BER=1 should produce no correct messages");
+ }
- // A bit error rate of 1.0 should not provide any correct messages
+ @Test
+ void testIntermediateBER() {
+ CRCAlgorithm c = new CRCAlgorithm("1101", 4, 0.5);
+ c.generateRandomMess();
+ for (int i = 0; i < 1000; i++) {
+ c.refactor();
+ c.generateRandomMess();
+ c.divideMessageWithP(false);
+ c.changeMess();
+ c.divideMessageWithP(true);
+ }
+ assertTrue(c.getWrongMess() > 0, "Some wrong messages expected with BER=0.5");
+ assertTrue(c.getWrongMessCaught() >= 0, "Wrong messages caught counter >= 0");
+ assertTrue(c.getWrongMessNotCaught() >= 0, "Wrong messages not caught counter >= 0");
+ assertTrue(c.getCorrectMess() >= 0, "Correct messages counter >= 0");
+ assertEquals(c.getWrongMess(), c.getWrongMessCaught() + c.getWrongMessNotCaught(), "Sum of caught and not caught wrong messages should equal total wrong messages");
+ }
+
+ @Test
+ void testMessageChangedFlag() {
+ CRCAlgorithm c = new CRCAlgorithm("1010", 4, 1.0);
+ c.generateRandomMess();
+ c.divideMessageWithP(false);
+ c.changeMess();
+ assertTrue(c.getWrongMess() > 0, "Message should be marked as changed with BER=1");
+ }
+
+ @Test
+ void testSmallMessageSize() {
+ CRCAlgorithm c = new CRCAlgorithm("11", 2, 0.0);
+ c.generateRandomMess();
+ c.divideMessageWithP(false);
c.changeMess();
+ c.divideMessageWithP(true);
+ assertEquals(0, c.getWrongMess(), "No errors expected for BER=0 with small message");
+ }
+
+ @Test
+ void testLargeMessageSize() {
+ CRCAlgorithm c = new CRCAlgorithm("1101", 1000, 0.01);
+ c.generateRandomMess();
c.divideMessageWithP(false);
- assertEquals(c.getCorrectMess(), 0);
+ c.changeMess();
+ c.divideMessageWithP(true);
+ // Just ensure counters are updated, no exceptions
+ assertTrue(c.getWrongMess() >= 0);
+ assertTrue(c.getCorrectMess() >= 0);
}
}
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