diff --git a/test/test_analytics/patch_test_files/example7_new.c b/test/test_analytics/patch_test_files/example7_new.c
new file mode 100644
index 00000000000..9782b3507f9
--- /dev/null
+++ b/test/test_analytics/patch_test_files/example7_new.c
@@ -0,0 +1,52 @@
+/* added in H */
+struct node
+{
+    int data;
+    struct node *next;
+}*head;
+
+/* added in H, edited in I */
+void append(int num)
+{
+    struct node *temp, *prev;
+    temp=head;
+    while(temp!=NULL)
+    {
+        if(temp->data==num)
+        {
+            if(temp==head)
+            {
+                head=temp->next;
+                free(temp);
+                return 1;
+            }
+            else
+            {
+                prev->next=temp->next;
+                free(temp);
+                return 1;
+            }
+        }
+        else
+        {
+            prev=temp;
+            temp= temp->next;
+        }
+    }
+    return 0;
+}
+
+/* added in H, edited in G */
+void add( int num )
+{
+    struct node *temp;
+    temp=(struct node *)malloc(sizeof(struct node));
+    temp->data=num;
+    if (head== NULL)
+    {
+        head=temp;
+        head->next=NULL;
+    }
+}
+
+/* insert() is deleted in I */ 
diff --git a/test/test_analytics/patch_test_files/example7_old.c b/test/test_analytics/patch_test_files/example7_old.c
new file mode 100644
index 00000000000..6157d001d3f
--- /dev/null
+++ b/test/test_analytics/patch_test_files/example7_old.c
@@ -0,0 +1,65 @@
+/* added in H */
+struct node
+{
+    int data;
+    struct node *next;
+}*head;
+
+/* added in H */
+void append(int num)
+{
+    struct node *temp,*right;
+    temp= (struct node *)malloc(sizeof(struct node));
+    temp->data=num;
+    right=(struct node *)head;
+    while(right->next != NULL)
+    right=right->next;
+    right->next =temp;
+    right=temp;
+    right->next=NULL;
+}
+
+/* added in H */
+void add( int num )
+{
+    struct node *temp;
+    temp=(struct node *)malloc(sizeof(struct node));
+    temp->data=num;
+    if (head== NULL)
+    {
+        head=temp;
+        head->next=NULL;
+    }
+    else
+    {
+        temp->next=head;
+        head=temp;
+    }
+}
+
+/* added in H */ 
+void insert(int num)
+{
+    int c=0;
+    struct node *temp;
+    temp=head;
+    if(temp==NULL)
+    {
+        add(num);
+    }
+    else
+    {
+        while(temp!=NULL)
+        {
+            if(temp->data<num)
+            c++;
+            temp=temp->next;
+        }
+        if(c==0)
+            add(num);
+        else if(c<count())
+            addafter(num,++c);
+        else
+            append(num);
+    }
+} 
diff --git a/test/test_analytics/test_analyzer.py b/test/test_analytics/test_analyzer.py
index fd011d463aa..3ed8ca8b7b5 100644
--- a/test/test_analytics/test_analyzer.py
+++ b/test/test_analytics/test_analyzer.py
@@ -32,23 +32,23 @@ async def test_analyzer_master_only(az):
 
     history_truth = {
         'K': {
-            'display': {'adds': 0, 'dels': 5}
+            'display': {'adds': 0, 'dels': 5, 'added_units': 0, 'removed_units': 10}
         },
         'F': {
-            'display': {'adds': 14, 'dels': 0},
-            'count': {'adds': 12, 'dels': 0}
+            'display': {'adds': 14, 'dels': 0, 'added_units': 23, 'removed_units': 0},
+            'count': {'adds': 12, 'dels': 0, 'added_units': 19, 'removed_units': 0}
         },
         'E': {
-            'append': {'adds': 29, 'dels': 0},
-            'add': {'adds': 11, 'dels': 0}
+            'append': {'adds': 29, 'dels': 0, 'added_units': 44, 'removed_units': 0},
+            'add': {'adds': 11, 'dels': 0, 'added_units': 25, 'removed_units': 0}
         },
         'D': {
-            'str_replace': {'adds': 26, 'dels': 0}
+            'str_replace': {'adds': 26, 'dels': 0, 'added_units': 76, 'removed_units': 0}
         },
         # TODO: fix \No newline at the end of file
         'C': {
-            'str_append_chr': {'adds': 30, 'dels': 4},
-            'str_equals': {'adds': 0, 'dels': 1}
+            'str_append_chr': {'adds': 30, 'dels': 4, 'added_units': 78, 'removed_units': 21},
+            'str_equals': {'adds': 0, 'dels': 1, 'added_units': 0, 'removed_units': 0}
         },
         # Commit `B` is an example of imperfect diff,
         # it removes `str_append` and adds a new function `str_append_chr`
@@ -56,15 +56,16 @@ async def test_analyzer_master_only(az):
         # diff doesn't separate these changes into two chunks
         # please see here: https://github.com/UltimateBeaver/test_feature_branch/commit/caaac10f604ea7ac759c2147df8fb2b588ee2a27
         'B': {
-            'str_append': {'adds': 6, 'dels': 3},
-            'str_append_chr': {'adds': 3, 'dels': 2},
-            'str_equals': {'adds': 11, 'dels': 0}
+            'str_append': {'adds': 6, 'dels': 3, 'added_units': 29, 'removed_units': 21},
+            'str_append_chr': {'adds': 3, 'dels': 2, 'added_units': 21, 'removed_units': 15},
+            'str_equals': {'adds': 11, 'dels': 0, 'added_units': 27, 'removed_units': 0}
         },
         'A': {
-            'str_append': {'adds': 7, 'dels': 0},
-            'str_len': {'adds': 6, 'dels': 0}
+            'str_append': {'adds': 7, 'dels': 0, 'added_units': 29, 'removed_units': 0},
+            'str_len': {'adds': 6, 'dels': 0, 'added_units': 13, 'removed_units': 0}
         },
 
+
         # # branch J from commit A, merge back through F
         # 'J': {
         #     'count': {'adds': 12, 'dels': 0},
diff --git a/test/test_analytics/test_analyzer_cpp.py b/test/test_analytics/test_analyzer_cpp.py
index a9ed01d435a..347f8bd17cb 100644
--- a/test/test_analytics/test_analyzer_cpp.py
+++ b/test/test_analytics/test_analyzer_cpp.py
@@ -41,13 +41,13 @@ async def test_analyzer_files(az):
 
     history_truth = {
         'C': {
-            'printmessage': {'adds': 4, 'dels': 0},
-            'main': {'adds': 4, 'dels': 0}
+            'printmessage': {'adds': 4, 'dels': 0, 'added_units': 7, 'removed_units': 0},
+            'main': {'adds': 4, 'dels': 0, 'added_units': 3, 'removed_units': 0}
         },
         'B': {},
         'A': {
-            'addition': {'adds': 6, 'dels': 0},
-            'main': {'adds': 6, 'dels': 0}
+            'addition': {'adds': 6, 'dels': 0, 'added_units': 13, 'removed_units': 0},
+            'main': {'adds': 6, 'dels': 0, 'added_units': 13, 'removed_units': 0}
         },
     }
 
diff --git a/test/test_analytics/test_detect_change.py b/test/test_analytics/test_detect_change.py
index f10851f4e2d..797a7205bb0 100644
--- a/test/test_analytics/test_detect_change.py
+++ b/test/test_analytics/test_detect_change.py
@@ -45,7 +45,7 @@ def test_detect_change():
         assert func_ranges_result == func_ranges_truth
 
     assert changed_result == get_changed_functions(
-        *func_ranges_result, *parsing_result)
+        *func_ranges_result, *parsing_result, None, None)
 
 
 def test_get_changed_functions():
@@ -64,23 +64,35 @@ def test_get_changed_functions():
         example_patch = f.read()
         parsing_result = parser.parse(example_patch)
 
+    old_src, new_src = '', ''
+    with open(os.path.join(dir_path, 'patch_test_files/example7_old.c'), 'r') as f:
+        old_src = f.read()
+    with open(os.path.join(dir_path, 'patch_test_files/example7_new.c'), 'r') as f:
+        new_src = f.read()
+
     changed_truth = {
         'append': {
             'adds': 26,
-            'dels': 9
+            'dels': 9,
+            'added_units': 40,
+            'removed_units': 33
         },
         'add': {
             'adds': 0,
-            'dels': 5
+            'dels': 5,
+            'added_units': 0,
+            'removed_units': 6
         },
         'insert': {
             'adds': 0,
-            'dels': 25
+            'dels': 25,
+            'added_units': 0,
+            'removed_units': 44
         }
 
     }
     assert changed_truth == get_changed_functions(
-        *func_ranges_truth, *parsing_result, separate=True)
+        *func_ranges_truth, *parsing_result, old_src, new_src, separate=True)
 
 
 def test_patch_parser():