From 46246828e95aa507456c78646cc9963eee0657aa Mon Sep 17 00:00:00 2001
From: Billy Fifield <fifieldb@oregonstate.edu>
Date: Mon, 12 Jun 2023 18:43:48 -0500
Subject: [PATCH] Adding prime check algorithm in C and adding CUnit tests

---
 algorithms/C/maths/prime.c | 116 +++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 algorithms/C/maths/prime.c

diff --git a/algorithms/C/maths/prime.c b/algorithms/C/maths/prime.c
new file mode 100644
index 00000000..9095304e
--- /dev/null
+++ b/algorithms/C/maths/prime.c
@@ -0,0 +1,116 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "CUnit/Basic.h"
+#include "CUnit/Console.h"
+#include "CUnit/Automated.h"
+
+/**********************************************
+THIS CODE USES CUNIT TO PROVIDE CODE COVERAGE.
+PLEASE DOWNLOAD THE CUNIT HEADER FILES BEFORE
+COMPILING
+***********************************************/
+
+int prime_check(int i)
+{
+	float half = i/2;
+	
+	if( i <= 1 ) return 1;
+	
+	for(int n = 2; n <= half; n++)
+	{
+		if( i % n == 0 ) return 1;
+	}
+	
+	return 0;
+}
+
+
+// Everything below sets up tests or tests the prime_check function above
+int init_suite_success(void) { return 0; }
+int init_suite_failure(void) { return -1; }
+int clean_suite_success(void) { return 0; }
+int clean_suite_failure(void) { return -1; }
+
+// Test an invalid, positive number
+void testInvalidPrime(void)
+{
+	int num = 9;
+	CU_ASSERT_EQUAL(1, prime_check(num));
+}
+
+// Test a valid prime number
+void testValidPrime(void)
+{
+	int num = 13;
+	CU_ASSERT_EQUAL(0, prime_check(num));
+}
+
+// Test a negative integer
+void testNegativePrime(void)
+{
+	int num = -13;
+	CU_ASSERT_EQUAL(1, prime_check(num));
+}
+
+
+int main()
+{
+ CU_pSuite pSuite = NULL;
+
+   /* initialize the CUnit test registry */
+   if (CUE_SUCCESS != CU_initialize_registry())
+      return CU_get_error();
+
+   /* add a suite to the registry */
+   pSuite = CU_add_suite("Suite_success", init_suite_success, clean_suite_success);
+   if (NULL == pSuite) {
+      CU_cleanup_registry();
+      return CU_get_error();
+   }
+
+   /* add the tests to the suite */
+   if ((NULL == CU_add_test(pSuite, "successful_testInvalidPrime", testInvalidPrime)))
+   {
+      CU_cleanup_registry();
+      return CU_get_error();
+   }
+   
+   /* add the tests to the suite */
+   if ((NULL == CU_add_test(pSuite, "successful_testValidPrime", testValidPrime)))
+   {
+      CU_cleanup_registry();
+      return CU_get_error();
+   }
+   
+   /* add the tests to the suite */
+   if ((NULL == CU_add_test(pSuite, "successful_testNegativePrime", testNegativePrime)))
+   {
+      CU_cleanup_registry();
+      return CU_get_error();
+   }
+
+   /* Run all tests using the basic interface */
+   CU_basic_set_mode(CU_BRM_VERBOSE);
+   CU_basic_run_tests();
+   printf("\n");
+   CU_basic_show_failures(CU_get_failure_list());
+   printf("\n\n");
+
+   /* Run all tests using the automated interface */
+   CU_automated_run_tests();
+   CU_list_tests_to_file();
+
+   /* Run all tests using the console interface */
+   CU_console_run_tests();
+
+   /* Clean up registry and return */
+   CU_cleanup_registry();
+   return CU_get_error();
+}
+
+
+
+
+
+