diff --git a/src/main/c/TicTacToe.h b/src/main/c/TicTacToe.h
new file mode 100644
index 0000000..1e04a7d
--- /dev/null
+++ b/src/main/c/TicTacToe.h
@@ -0,0 +1,7 @@
+#ifndef TICTACTOE_H
+#define TICTACTOE_H
+
+int Winner(char board[3][3]);
+
+#endif
+
diff --git a/src/test/c/test_TicTacToe.c b/src/test/c/test_TicTacToe.c
new file mode 100644
index 0000000..b1c8b25
--- /dev/null
+++ b/src/test/c/test_TicTacToe.c
@@ -0,0 +1,29 @@
+
+#include "unity.h"
+
+#include "TicTacToe.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_TicTacToe_Winner_X_line_1(void)
+{
+    /* arrange */
+        int expected = 1;
+        int actual;
+    char board[3][3] = {
+        {'X', 'X', 'X'},
+        {'O', 'O', '_'},
+        {'O', '_', '_'}
+    };
+    /* act */
+        actual = Winner(board);
+    
+    /* assert */
+        TEST_ASSERT_EQUAL_INT(expected, actual);
+}
\ No newline at end of file