Added one more unit Test and Bugfix in createNumbers

highscores.txt

@@ -1 +1,2 @@
+player_name;18787
 player1;3999

makefile

@@ -37,6 +37,8 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 unitTests:
 	echo "needs to be implemented"
+numbersTests: numbers.o numbersTests.c $(unityfolder)/unity.c
+	$(CC) $(CFLAGS) -I$(unityfolder) -o runNumbersTests numbersTests.c numbers.o $(unityfolder)/unity.c
 
 # --------------------------
 # Clean

numbers.c

@@ -14,13 +14,92 @@
 // Returns len random numbers between 1 and 2x len in random order which are all different, except for two entries.
 // Returns NULL on errors. Use your implementation of the binary search tree to check for possible duplicates while
 // creating random numbers.
-unsigned int *createNumbers(unsigned int len)
-{
+unsigned int *createNumbers(unsigned int len){
+
+	if(len == 1){
+		printf("Minimum length is 2");
+		return NULL;
+	}
+	srand(time(NULL));
+	unsigned int *numbers = malloc(len * sizeof(unsigned int)); //reserving memory for array
+	if(!numbers){
+		printf("Error allocating Memory");
+		return NULL;
+	}
+
+	for (int i = 0; i < len; i++){
+		numbers[i] = rand() % (2 * len) + 1; //creates randorm number between 1 and 2x len
+		if(getDuplicate(numbers, i+1)){ //We use i+1 to refer to current initialised array length
+			i--;  //If there a douplicate has been created, i gets 1 lower therefore overwriting it in next iteration
+		}
+	}
+	//Creating Duplicate
+	unsigned int duplicationSuccess = 0;
+	while (duplicationSuccess == 0){
+		unsigned int duplicateInitialIndex = rand()%len; //Getting random index for creating duplicate
+		unsigned int duplicateReplaceIndex = rand ()%len; //Index of Number replaced by duplicateInitialIndex
+
+		if(duplicateInitialIndex == duplicateReplaceIndex)
+			continue; //returning process if chosen duplicate is replacing itsself
+
+		duplicationSuccess = 1;
+		numbers[duplicateReplaceIndex] = numbers [duplicateInitialIndex];
+		}
+
+
+
+	return numbers;
 
 }
 
 // Returns only the only number in numbers which is present twice. Returns zero on errors.
 unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
 {
+	unsigned int *sortedNumbers = malloc(len * sizeof(unsigned int));
+	if(!sortedNumbers){
+		printf("Error allocating memory");
+		return 0;
+	}
+
+	//Creating Copy of Numbers Array
+	for (int i = 0; i < len; i++){
+		sortedNumbers[i] = numbers[i];
+	}
+
+	unsigned int duplicate = 0;
+	unsigned int temp = 0;
+	unsigned int duplicateCount = 0;
+
+	//Sorting sortedNumbers
+	for (int i = 0; i < len; i++){
+		for(int j = 0; j< len - 1; j++){
+			if(sortedNumbers[j]> sortedNumbers[j+1]){ //Switching Elements
+				temp = sortedNumbers[j];
+				sortedNumbers[j] = sortedNumbers[j+1];
+				sortedNumbers[j+1] = temp;
+			}
+
+
+
+		}
+	}
+	//identifying duplicates
+
+	for(int i = 0; i < len; i++){
+	    if(sortedNumbers[i] == sortedNumbers[i+1]){
+			duplicate = sortedNumbers[i];
+			duplicateCount++;
+		}
+
+	}
+
+
+	free(sortedNumbers);
+	if(duplicateCount != 1){
+		return 0;
+	}
+
+
+	return duplicate;
 
 }

numbersTests.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "unity.h"
+#include "numbers.h"
+
+void test_ArrayIsCreatedAndNotNull(void){
+    size_t len = 15;
+    int *testArray = createNumbers(len);
+
+    TEST_ASSERT_NOT_NULL(testArray); //If array hasnt been created at all
+
+    free(testArray);
+}
+
+
+void test_getDouplicateReturnsDouplicateNumber(void){
+
+    unsigned int testArray[8] = {1, 2, 3, 3, 4, 5, 6, 7};
+    unsigned int testValue = getDuplicate(testArray, 8);
+
+    TEST_ASSERT_EQUAL(3, testValue);
+}
+
+
+void test_getDouplicateReturnsZeroWhenThereIsNoDuplicate(void){
+    unsigned int testArray[8] = {1, 2, 3, 4, 5, 6, 7, 8};
+    unsigned int testValue = getDuplicate(testArray, 8);
+
+    TEST_ASSERT_EQUAL(0, testValue);
+}
+
+void test_getDouplicateReturnsZeroWhenThereAreMultipleDuplicates(void){
+
+    unsigned int testArray[8] = {1, 3, 3, 4, 5, 6, 7, 7};
+    unsigned int testValue = getDuplicate(testArray, 8);
+
+    TEST_ASSERT_EQUAL(0, testValue);
+}
+
+void test_CreateNumbersCreatesDuplicatein2LenArray(void){
+    unsigned int *testArray = createNumbers(2);
+    unsigned int testValue = getDuplicate(testArray, 2);
+
+    if(!testValue)
+        testValue = 0;
+
+    else
+        testValue = 1;
+
+    TEST_ASSERT_EQUAL(1, testValue);
+
+}
+void setUp(void){}
+void tearDown(void){}
+
+int main(){
+UNITY_BEGIN();
+
+printf("\n============================\nNumbers tests\n============================\n");
+
+RUN_TEST(test_ArrayIsCreatedAndNotNull);
+RUN_TEST(test_CreateNumbersCreatesDuplicatein2LenArray);
+RUN_TEST(test_getDouplicateReturnsDouplicateNumber);
+RUN_TEST(test_getDouplicateReturnsZeroWhenThereIsNoDuplicate);
+RUN_TEST(test_getDouplicateReturnsZeroWhenThereAreMultipleDuplicates);
+
+return UNITY_END();
+}