diff --git a/scripts/StockVisualizer/stock.py b/scripts/StockVisualizer/stock.py
index b51a355..9988c76 100644
--- a/scripts/StockVisualizer/stock.py
+++ b/scripts/StockVisualizer/stock.py
@@ -2,18 +2,32 @@ import pandas as pd
 import yfinance as yf
 import matplotlib.pyplot as plt
 
-ticker = input('Stock Symbol: ')
-start_date = input('Start Date (YYYY-MM-DD): ')
-end_date = input('End Date (YYYY-MM-DD): ')
+def get_df(ticker, start_date, end_date):
+    stock = yf.Ticker(ticker)
+    df = stock.history(start=start_date, end=end_date)  
+    return df
+
+def plot(df, ticker):
+    plt.figure(figsize=(14, 8))
+    plt.plot(df['Close'])
+    plt.title(f'{ticker} Stock Price')
+    plt.xlabel('Date')
+    plt.ylabel('Price (USD)')
+    plt.grid()
+    plt.show()
+
+def user_input():
+    ticker = input('Stock Symbol: ')
+    start_date = input('Start Date (YYYY-MM-DD): ')
+    end_date = input('End Date (YYYY-MM-DD): ')
+    return ticker, start_date, end_date
+
+def stock_visualizer():
+    ticker, start_date, end_date = user_input()
+    df = get_df(ticker, start_date, end_date)
+    plot(df, ticker)
+
+
 
-stock = yf.Ticker(ticker)
-df = stock.history(start=start_date, end=end_date)
 
-plt.figure(figsize=(14, 8))
-plt.plot(df['Close'])
-plt.title(f'{ticker} Stock Price')
-plt.xlabel('Date')
-plt.ylabel('Price (USD)')
-plt.grid()
-plt.show()
 
diff --git a/scripts/StockVisualizer/tests/tests.py b/scripts/StockVisualizer/tests/tests.py
new file mode 100644
index 0000000..0c8a1e4
--- /dev/null
+++ b/scripts/StockVisualizer/tests/tests.py
@@ -0,0 +1,18 @@
+import yfinance as yf
+from stock import (
+    get_df,
+    plot,
+    user_input,
+    stock_visualizer
+)
+
+def test_df():
+    stock = yf.Ticker("MSFT")
+    assert (get_df(stock, "2023-01-01", "2023-02-01") != None)
+
+def test_plot():
+    stock = yf.Ticker("MSFT")
+    df = get_df(stock, "2023-01-01", "2023-02-01")
+    assert(plot(df, stock) != None)
+
+