diff --git a/src/tests.rs b/src/tests.rs
new file mode 100644
index 0000000..44e8cf9
--- /dev/null
+++ b/src/tests.rs
@@ -0,0 +1,284 @@
+#[cfg(test)]
+mod tests {
+    use std::fs;
+    use std::path::Path;
+    use std::process::Command;
+    use tempfile::tempdir;
+
+    // Helper function to run the keep command with given arguments
+    fn run_keep(args: &[&str]) -> std::process::Output {
+        let output = Command::new("cargo")
+            .args(["run", "--", args])
+            .output()
+            .expect("Failed to execute command");
+        output
+    }
+
+    // Helper function to create a temporary test environment
+    fn with_temp_env<F>(f: F)
+    where
+        F: FnOnce(&Path),
+    {
+        let dir = tempdir().expect("Failed to create temporary directory");
+        let db_path = dir.path().join("keep-1.db");
+        
+        // Create the data directory structure
+        fs::create_dir_all(dir.path()).expect("Failed to create directory");
+        
+        // Run the test
+        f(dir.path());
+        
+        // Clean up
+        dir.close().expect("Failed to remove temporary directory");
+    }
+
+    // Helper function to check if a file exists in the data directory
+    fn file_exists(data_dir: &Path, id: i64) -> bool {
+        let path = data_dir.join(id.to_string());
+        path.exists()
+    }
+
+    // Helper function to get the content of a file
+    fn file_content(data_dir: &Path, id: i64) -> String {
+        let path = data_dir.join(id.to_string());
+        std::fs::read_to_string(path).expect("Failed to read file")
+    }
+
+    // Test: Save an item and verify it's stored
+    #[test]
+    fn test_save_item() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // Verify the item was saved
+            let items: Vec<String> = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command")
+                .stdout;
+                
+            assert!(String::from_utf8_lossy(&items).contains(input));
+        });
+    }
+
+    // Test: Get an item and verify the content
+    #[test]
+    fn test_get_item() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // Get the item and verify the content
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --get", env))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert_eq!(String::from_utf8_lossy(&output.stdout), input);
+        });
+    }
+
+    // Test: List items and verify the output
+    #[test]
+    fn test_list_items() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // List items and verify the output
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert!(String::from_utf8_lossy(&output.stdout).contains(input));
+        });
+    }
+
+    // Test: Delete an item and verify it's removed
+    #[test]
+    fn test_delete_item() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // Get the item ID
+            let list_output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command");
+            let list_output_str = String::from_utf8_lossy(&list_output.stdout);
+            let id = list_output_str.lines().next().expect("No items found").split_whitespace().next().expect("No ID found").parse::<i64>().expect("Invalid ID");
+            
+            // Delete the item
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --delete {}", env, id))
+                .output()
+                .expect("Failed to execute command");
+                
+            // Verify the item was deleted
+            let list_output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert_eq!(String::from_utf8_lossy(&list_output.stdout).trim(), "");
+        });
+    }
+
+    // Test: Add metadata to an item and verify it's stored
+    #[test]
+    fn test_metadata() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content and metadata
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save --meta key=value"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // Get the item ID
+            let list_output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command");
+            let list_output_str = String::from_utf8_lossy(&list_output.stdout);
+            let id = list_output_str.lines().next().expect("No items found").split_whitespace().next().expect("No ID found").parse::<i64>().expect("Invalid ID");
+            
+            // Get the item and verify the metadata
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --info {}", env, id))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert!(String::from_utf8_lossy(&output.stdout).contains("key: value"));
+        });
+    }
+
+    // Test: Use tags to organize items
+    #[test]
+    fn test_tags() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content and tags
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save --tag tag1 --tag tag2"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // List items with a specific tag
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list --tag tag1", env))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert!(String::from_utf8_lossy(&output.stdout).contains("test content"));
+        });
+    }
+
+    // Test: Use compression
+    #[test]
+    fn test_compression() {
+        with_temp_env(|data_dir| {
+            // Set the data directory for this test
+            let env = format!("KEEP_DIR={}", data_dir.display());
+            
+            // Save an item with some content and compression
+            let input = "test content";
+            let mut child = Command::new("sh")
+                .arg("-c")
+                .arg(format!("echo {} | {}", input, env))
+                .arg("cargo run -- --save --compression gzip"))
+                .spawn()
+                .expect("Failed to spawn process");
+            
+            child.wait().expect("Failed to wait for child process");
+            
+            // Get the item ID
+            let list_output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --list", env))
+                .output()
+                .expect("Failed to execute command");
+            let list_output_str = String::from_utf8_lossy(&list_output.stdout);
+            let id = list_output_str.lines().next().expect("No items found").split_whitespace().next().expect("No ID found").parse::<i64>().expect("Invalid ID");
+            
+            // Get the item and verify the content
+            let output = Command::new("sh")
+                .arg("-c")
+                .arg(format!("{} cargo run -- --get {}", env, id))
+                .output()
+                .expect("Failed to execute command");
+                
+            assert_eq!(String::from_utf8_lossy(&output.stdout), input);
+        });
+    }
+}