1 files changed, 55 insertions, 9 deletions

diff --git a/test_prof_history.c b/test_prof_history.c
index 5a9ae217..db4ef24b 100644
--- a/test_prof_history.c
+++ b/test_prof_history.c
@@ -2,18 +2,18 @@
 #include <head-unit.h>
 #include "prof_history.h"
 
-void previous_on_empty_returns_null(void)
+void previous_on_empty_returns_current(void)
 {
     PHistory history = p_history_new(10);
-    char *item = p_history_previous(history);
+    char *item = p_history_previous(history, "inp");
 
-    assert_is_null(item);
+    assert_string_equals("inp", item);
 }
 
 void next_on_empty_returns_null(void)
 {
     PHistory history = p_history_new(10);
-    char *item = p_history_next(history);
+    char *item = p_history_next(history, "inp");
 
     assert_is_null(item);
 }
@@ -23,7 +23,7 @@ void previous_once_returns_last(void)
     PHistory history = p_history_new(10);
     p_history_append(history, "Hello");
 
-    char *item = p_history_previous(history);
+    char *item = p_history_previous(history, "inp");
 
     assert_string_equals("Hello", item);
 }
@@ -33,17 +33,63 @@ void previous_twice_when_one_returns_first(void)
     PHistory history = p_history_new(10);
     p_history_append(history, "Hello");
 
-    p_history_previous(history);
-    char *item = p_history_previous(history);
+    char *item1 = p_history_previous(history, NULL);
+    char *item2 = p_history_previous(history, item1);
 
-    assert_string_equals("Hello", item);
+    assert_string_equals("Hello", item2);
+}
+
+void previous_always_stops_at_first(void)
+{
+    PHistory history = p_history_new(10);
+    p_history_append(history, "Hello");
+
+    char *item1 = p_history_previous(history, NULL);
+    char *item2 = p_history_previous(history, item1);
+    char *item3 = p_history_previous(history, item2);
+    char *item4 = p_history_previous(history, item3);
+    char *item5 = p_history_previous(history, item4);
+    char *item6 = p_history_previous(history, item5);
+
+    assert_string_equals("Hello", item6);
+}
+
+void previous_goes_to_correct_element(void)
+{
+    PHistory history = p_history_new(10);
+    p_history_append(history, "Hello");
+    p_history_append(history, "world");
+    p_history_append(history, "whats");
+    p_history_append(history, "going");
+    p_history_append(history, "on");
+    p_history_append(history, "here");
+
+    char *item1 = p_history_previous(history, NULL);
+    char *item2 = p_history_previous(history, item1);
+    char *item3 = p_history_previous(history, item2);
+    
+    assert_string_equals("going", item3); 
+}
+
+void prev_then_next_returns_null(void)
+{
+    PHistory history = p_history_new(10);
+    p_history_append(history, "Hello");
+
+    char *item1 = p_history_previous(history, NULL);
+    char *item2 = p_history_next(history, item1);
+
+    assert_is_null(item2);
 }
 
 void register_prof_history_tests(void)
 {
     TEST_MODULE("prof_history tests");
-    TEST(previous_on_empty_returns_null);
+    TEST(previous_on_empty_returns_current);
     TEST(next_on_empty_returns_null);
     TEST(previous_once_returns_last);
     TEST(previous_twice_when_one_returns_first);
+    TEST(previous_always_stops_at_first);
+    TEST(previous_goes_to_correct_element);
+    TEST(prev_then_next_returns_null);
 }