5 files changed, 76 insertions, 0 deletions
diff --git a/src/common.c b/src/common.c
index 832e85dd..bd8b1742 100644
--- a/src/common.c
+++ b/src/common.c
@@ -192,6 +192,12 @@ str_replace(const char *string, const char *substr,
     return newstr;
 }
 
+gboolean
+str_contains_str(char *searchstr, char *substr)
+{
+    return g_strrstr(searchstr, substr) != NULL;
+}
+
 int
 str_contains(const char str[], int size, char ch)
 {
diff --git a/src/common.h b/src/common.h
index 9da0c974..1e50a87a 100644
--- a/src/common.h
+++ b/src/common.h
@@ -104,6 +104,7 @@ gboolean create_dir(char *name);
 gboolean mkdir_recursive(const char *dir);
 char * str_replace(const char *string, const char *substr,
     const char *replacement);
+gboolean str_contains_str(char *searchstr, char *substr);
 int str_contains(const char str[], int size, char ch);
 gboolean strtoi_range(char *str, int *saveptr, int min, int max, char **err_msg);
 int utf8_display_len(const char * const str);
diff --git a/tests/unittests/test_common.c b/tests/unittests/test_common.c
index 980f2198..ac1e562a 100644
--- a/tests/unittests/test_common.c
+++ b/tests/unittests/test_common.c
@@ -631,3 +631,58 @@ void strip_quotes_strips_both(void **state)
     free(result);
 }
 
+void str_not_contains_str(void **state)
+{
+    char *main = "somestring";
+    char *occur = "not";
+
+    assert_false(str_contains_str(main, occur));
+}
+
+void str_contains_str_at_start(void **state)
+{
+    char *main = "somestring";
+    char *occur = "some";
+
+    assert_true(str_contains_str(main, occur));
+}
+
+void str_contains_str_at_end(void **state)
+{
+    char *main = "somestring";
+    char *occur = "string";
+
+    assert_true(str_contains_str(main, occur));
+}
+
+void str_contains_str_in_middle(void **state)
+{
+    char *main = "somestring";
+    char *occur = "str";
+
+    assert_true(str_contains_str(main, occur));
+}
+
+void str_empty_not_contains_str(void **state)
+{
+    char *main = NULL;
+    char *occur = "str";
+
+    assert_false(str_contains_str(main, occur));
+}
+
+void str_not_contains_str_empty(void **state)
+{
+    char *main = "somestring";
+    char *occur = NULL;
+
+    assert_false(str_contains_str(main, occur));
+}
+
+void str_empty_not_contains_str_empty(void **state)
+{
+    char *main = NULL;
+    char *occur = NULL;
+
+    assert_false(str_contains_str(main, occur));
+}
diff --git a/tests/unittests/test_common.h b/tests/unittests/test_common.h
index b4b98e5a..1f24e6b1 100644
--- a/tests/unittests/test_common.h
+++ b/tests/unittests/test_common.h
@@ -56,3 +56,10 @@ void strip_quotes_does_nothing_when_no_quoted(void **state);
 void strip_quotes_strips_first(void **state);
 void strip_quotes_strips_last(void **state);
 void strip_quotes_strips_both(void **state);
+void str_not_contains_str(void **state);
+void str_contains_str_at_start(void **state);
+void str_contains_str_at_end(void **state);
+void str_contains_str_in_middle(void **state);
+void str_empty_not_contains_str(void **state);
+void str_not_contains_str_empty(void **state);
+void str_empty_not_contains_str_empty(void **state);
diff --git a/tests/unittests/unittests.c b/tests/unittests/unittests.c
index 0545d6a4..6e88debb 100644
--- a/tests/unittests/unittests.c
+++ b/tests/unittests/unittests.c
@@ -95,6 +95,13 @@ int main(int argc, char* argv[]) {
         unit_test(strip_quotes_strips_first),
         unit_test(strip_quotes_strips_last),
         unit_test(strip_quotes_strips_both),
+        unit_test(str_not_contains_str),
+        unit_test(str_contains_str_at_start),
+        unit_test(str_contains_str_at_end),
+        unit_test(str_contains_str_in_middle),
+        unit_test(str_empty_not_contains_str),
+        unit_test(str_not_contains_str_empty),
+        unit_test(str_empty_not_contains_str_empty),
 
         unit_test(clear_empty),
         unit_test(reset_after_create),