rewrote as parameterized tests (#4458)

* rewrote as parameterized tests

* formatting issue resolved

* added test with different prime number q

* style: run `clang-format`

* tests: add missing test case

---------

Co-authored-by: Piotr Idzik <[email protected]>

Author: asapekia

src/test/java/com/thealgorithms/searches/RabinKarpAlgorithmTest.java

@@ -1,56 +1,18 @@
 package com.thealgorithms.searches;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 class RabinKarpAlgorithmTest {
-
     RabinKarpAlgorithm RKA = new RabinKarpAlgorithm();
-    int q = 101;
-
-    @Test
-    // valid test case
-    public void RabinKarpAlgorithmTestExample() {
-        String txt = "This is an example for rabin karp algorithmn";
-        String pat = "algorithmn";
-        int value = RKA.search(pat, txt, q);
-        assertEquals(value, 34);
-    }
-
-    @Test
-    // valid test case
-    public void RabinKarpAlgorithmTestFront() {
-        String txt = "AAABBDDG";
-        String pat = "AAA";
-        int value = RKA.search(pat, txt, q);
-        assertEquals(value, 0);
-    }
-
-    @Test
-    // valid test case
-    public void RabinKarpAlgorithmTestMiddle() {
-        String txt = "AAABBCCBB";
-        String pat = "BBCC";
-        int value = RKA.search(pat, txt, q);
-        assertEquals(value, 3);
-    }
-
-    @Test
-    // valid test case
-    public void RabinKarpAlgorithmTestLast() {
-        String txt = "AAAABBBBCCC";
-        String pat = "CCC";
-        int value = RKA.search(pat, txt, q);
-        assertEquals(value, 8);
-    }
 
-    @Test
-    // valid test case
-    public void RabinKarpAlgorithmTestNotFound() {
-        String txt = "ABCBCBCAAB";
-        String pat = "AADB";
-        int value = RKA.search(pat, txt, q);
-        assertEquals(value, -1);
+    @ParameterizedTest
+    @CsvSource({"This is an example for rabin karp algorithmn, algorithmn, 101", "AAABBDDG, AAA, 137", "AAABBCCBB, BBCC, 101", "AAABBCCBB, BBCC, 131", "AAAABBBBCCC, CCC, 41", "ABCBCBCAAB, AADB, 293", "Algorithm The Algorithm, Algorithm, 101"})
+    void RabinKarpAlgorithmTestExample(String txt, String pat, int q) {
+        int indexFromOurAlgorithm = RKA.search(pat, txt, q);
+        int indexFromLinearSearch = txt.indexOf(pat);
+        assertEquals(indexFromOurAlgorithm, indexFromLinearSearch);
     }
 }