all unit tests successful, might have fixed bug

unit-tests/test_pretty_print_date_time.c

@@ -1,7 +1,38 @@
 #include "../src/date_time_handling.h"
 #include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
 
 int main() {
+	// 1
+	char* pdt = pretty_date_time("20251215T080000Z");
+
+	assert(!strcmp(pdt, "2025-12-15 08:00:00"));
+
+	free(pdt);
+
+	// 2
+	char* pdt2 = pretty_date_time("20251215T080000");
+
+	assert(!strcmp(pdt2, "2025-12-15 08:00:00"));
+
+	free(pdt2);
+
+	// 3
+	char* pdt3 = pretty_date_time("");
+
+	assert(!strcmp(pdt3, ""));
+
+	free(pdt3);
+
+	// 4
+	char* pdt4 = pretty_date_time("20251215");
+
+	assert(!strcmp(pdt4, "2025-12-15"));
+
+	free(pdt4);
+
+	// 5
 	char current_date[] = "20240710T103000";
 
 	printf("current_date: %s\n", current_date);
@@ -13,6 +44,7 @@ int main() {
 	printf("strlen(current_date): %ld\n", strlen(current_date));
 
 	pretty_print_date_time("20251215T080000Z");
+	printf("\n");
 
 	return 0;
 }

unit-tests/test_print_upcoming.c

@@ -6,6 +6,8 @@ int main() {
 	// initialize empty list
 	struct event *head = NULL;
 
+	// 1
+	printf("\nTesting tests/failed_cal.ics:\n\n");
 	char *current_date = "20240710T113000";
 
 	printf("DEBUG - current_date: %s\n\n", current_date);
@@ -13,4 +15,10 @@ int main() {
 	parse_ics_file("../../tests/failed_cal.ics", &head);
 
 	print_upcoming(head, current_date, 0);
+
+	// 2
+	printf("\nTesting tests/calendar.ics:\n\n");
+	parse_ics_file("../../tests/calendar.ics", &head);
+
+	print_upcoming(head, current_date, 0);
 }