diff --git a/config.rs b/config.rs
new file mode 100644
index 0000000..0fa7025
--- /dev/null
+++ b/config.rs
@@ -0,0 +1,35 @@
+use scootaloo::parse_toml;
+
+#[test]
+fn parse_good_toml() {
+    let tConfig = TwitterConfig {
+        username: "test",
+        consumer_key: "foo",
+        consumer_secret: "bar",
+        access_key: "secret",
+        access_secret: "super secret",
+    };
+
+    let mConfig = MastodonConfig {
+        base: "https://www.example.com",
+        client_id: "my_id",
+        client_secret: "this is secret",
+        redirect: "ooo:oooo:o",
+        token: "super secret",
+    };
+
+    let sConfig = ScootalooConfig {
+        db_path: "/tmp/scootaloo/scootaloo.db",
+        cache_path: "/tmp",
+    };
+
+    let test_config = Config {
+        twitter: tConfig,
+        mastodon: mConfig,
+        scootaloo: sConfig,
+    };
+
+    let parsed_config = parse_toml("tests/right_config.toml");
+
+    assert_eq!(parsed_config, test_config);
+}
diff --git a/src/lib.rs b/src/lib.rs
index c2b2e9d..643ffd5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,6 @@
 // auto-imports
 mod error;
-use error::ScootalooError;
+use crate::error::ScootalooError;
 
 mod config;
 use config::Config;
diff --git a/src/main.rs b/src/main.rs
index 77bb07d..e700c1e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -61,7 +61,7 @@ fn main() {
         },
         ("init", Some(sub_m)) => {
             let config = parse_toml(sub_m.value_of("config").unwrap_or(DEFAULT_CONFIG_PATH));
-            init_db(&config).unwrap();
+            init_db(&config.scootaloo).unwrap();
             return;
         },
         _ => (),
diff --git a/src/mastodon.rs b/src/mastodon.rs
index 3f93e9d..d81a963 100644
--- a/src/mastodon.rs
+++ b/src/mastodon.rs
@@ -1,6 +1,5 @@
 // auto imports
 use crate::config::MastodonConfig;
-use crate::twitter::decode_urls;
 
 // std
 use std::{
@@ -16,7 +15,7 @@ use htmlescape::decode_html;
 // egg-mode
 use egg_mode::{
     tweet::Tweet,
-    entities::MentionEntity,
+    entities::{UrlEntity, MentionEntity},
 };
 
 // elefren
@@ -39,6 +38,20 @@ fn twitter_mentions(ums: &Vec<MentionEntity>) -> HashMap<String, String> {
     decoded_mentions
 }
 
+/// Decodes urls from UrlEntities
+fn decode_urls(urls: &Vec<UrlEntity>) -> HashMap<String, String> {
+    let mut decoded_urls = HashMap::new();
+
+    for url in urls {
+        if url.expanded_url.is_some() {
+            // unwrap is safe here as we just verified that there is something inside expanded_url
+            decoded_urls.insert(String::from(&url.url), String::from(url.expanded_url.as_deref().unwrap()));
+        }
+    }
+
+    decoded_urls
+}
+
 /// Gets Mastodon Data
 pub fn get_mastodon_token(masto: &MastodonConfig) -> Mastodon {
     let data = Data {
@@ -104,3 +117,52 @@ pub fn register(host: &str) {
     println!("Please insert the following block at the end of your configuration file:\n[mastodon]\n{}", toml);
 }
 
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_twitter_mentions() {
+        let mention_entity = MentionEntity {
+            id: 12345,
+            range: (1, 3),
+            name: String::from("Ta Mere l0l"),
+            screen_name: String::from("tamerelol"),
+        };
+
+        let twitter_ums = vec![mention_entity];
+
+        let mut expected_mentions = HashMap::new();
+        expected_mentions.insert(String::from("@tamerelol"), String::from("@tamerelol@twitter.com"));
+
+        let decoded_mentions = twitter_mentions(&twitter_ums);
+
+        assert_eq!(expected_mentions, decoded_mentions);
+    }
+
+    #[test]
+    fn test_decode_urls() {
+        let url_entity1 = UrlEntity {
+            display_url: String::from("tamerelol"),
+            expanded_url: Some(String::from("https://www.nintendojo.fr/dojobar")),
+            range: (1, 3),
+            url: String::from("https://t.me/tamerelol"),
+        };
+
+        let url_entity2 = UrlEntity {
+            display_url: String::from("tamerelol"),
+            expanded_url: None,
+            range: (1, 3),
+            url: String::from("https://t.me/tamerelol"),
+        };
+
+        let twitter_urls = vec![url_entity1, url_entity2];
+
+        let mut expected_urls = HashMap::new();
+        expected_urls.insert(String::from("https://t.me/tamerelol"), String::from("https://www.nintendojo.fr/dojobar"));
+
+        let decoded_urls = decode_urls(&twitter_urls);
+
+        assert_eq!(expected_urls, decoded_urls);
+    }
+}
diff --git a/src/state.rs b/src/state.rs
index bc9f482..42b2f16 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -1,5 +1,5 @@
 // auto-imports
-use crate::config::Config;
+use crate::config::ScootalooConfig;
 
 // std
 use std::{
@@ -10,6 +10,9 @@ use std::{
 // log
 use log::debug;
 
+// rusqlite
+use rusqlite::{Connection, OpenFlags, params};
+
 /// Reads last tweet id from a file
 pub fn read_state(s: &str) -> Option<u64> {
     let state = read_to_string(s);
@@ -31,8 +34,68 @@ pub fn write_state(f: &str, s: u64) -> Result<(), std::io::Error> {
  * Main functions
 *********/
 /// Initiates the DB from path
-pub fn init_db(config: &Config) -> Result<(), Box<dyn Error>> {
-    println!("config.scootaloo.db_path: {}", config.scootaloo.db_path);
+pub fn init_db(config: &ScootalooConfig) -> Result<(), Box<dyn Error>> {
+    let conn = Connection::open(&config.db_path)?;
+
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS tweet_to_toot (
+            tweet_id        INTEGER PRIMARY KEY,
+            toot_id         TEXT UNIQUE
+            )",
+        [],
+    )?;
+
     Ok(())
 }
 
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::{
+        fs::remove_file,
+        path::Path,
+    };
+
+    #[test]
+    fn test_init_db() {
+        let scootaloo_config = ScootalooConfig {
+            db_path: String::from("/tmp/test_init_db.sqlite"),
+            cache_path: String::from("/tmp/scootaloo"),
+        };
+
+        init_db(&scootaloo_config).unwrap();
+
+        // check that file exist
+        assert!(Path::new(&scootaloo_config.db_path).exists());
+
+        // open said file
+        let conn = Connection::open_with_flags(&scootaloo_config.db_path, OpenFlags::SQLITE_OPEN_READ_ONLY).unwrap();
+
+        conn.execute(
+            "SELECT * from tweet_to_toot;",
+            [],
+        ).unwrap();
+
+        conn.close().unwrap();
+        remove_file(&scootaloo_config.db_path).unwrap();
+    }
+
+    #[test]
+    fn test_read_state() {
+        let scootaloo_config = ScootalooConfig {
+            db_path: String::from("/tmp/test_read_state.sqlite"),
+            cache_path: String::from("/tmp/scootaloo"),
+        };
+
+        init_db(&scootaloo_config).unwrap();
+
+        let conn = Connection::open(&scootaloo_config.db_path).unwrap();
+
+        conn.execute(
+            "INSERT INTO tweet_to_toot (tweet_id, toot_id) VALUES (?1, ?2)",
+            params![123456789 as u64, String::from("987654321")],
+        ).unwrap();
+
+
+    }
+}
diff --git a/src/twitter.rs b/src/twitter.rs
index f44c071..5821bb0 100644
--- a/src/twitter.rs
+++ b/src/twitter.rs
@@ -4,16 +4,13 @@ use crate::config::TwitterConfig;
 use crate::util::cache_media;
 
 // std
-use std::{
-    error::Error,
-    collections::HashMap,
-};
+use std::error::Error;
 
 // egg-mode
 use egg_mode::{
     Token,
     KeyPair,
-    entities::{UrlEntity, MediaEntity, MediaType},
+    entities::{MediaEntity, MediaType},
     user::UserID,
     tweet::{
         Tweet,
@@ -43,20 +40,6 @@ pub async fn get_user_timeline(config: &TwitterConfig, token: Token, lid: Option
     Ok(feed.to_vec())
 }
 
-/// Decodes urls from UrlEntities
-pub fn decode_urls(urls: &Vec<UrlEntity>) -> HashMap<String, String> {
-    let mut decoded_urls = HashMap::new();
-
-    for url in urls {
-        if url.expanded_url.is_some() {
-            // unwrap is safe here as we just verified that there is something inside expanded_url
-            decoded_urls.insert(String::from(&url.url), String::from(url.expanded_url.as_deref().unwrap()));
-        }
-    }
-
-    decoded_urls
-}
-
 /// Retrieves a single media from a tweet and store it in a temporary file
 pub async fn get_tweet_media(m: &MediaEntity, t: &str) -> Result<String, Box<dyn Error>> {
     match m.media_type {
diff --git a/tests/bad_test.toml b/tests/bad_test.toml
new file mode 100644
index 0000000..907b308
--- /dev/null
+++ b/tests/bad_test.toml
@@ -0,0 +1 @@
+blah
diff --git a/tests/config.rs b/tests/config.rs
new file mode 100644
index 0000000..ce1e1a7
--- /dev/null
+++ b/tests/config.rs
@@ -0,0 +1,33 @@
+use scootaloo::parse_toml;
+
+#[test]
+fn test_parse_good_toml() {
+    let parse_good_toml = parse_toml("tests/good_test.toml");
+
+    assert_eq!(parse_good_toml.scootaloo.db_path, "/var/random/scootaloo.sqlite");
+    assert_eq!(parse_good_toml.scootaloo.cache_path, "/tmp/scootaloo");
+
+    assert_eq!(parse_good_toml.twitter.username, "tamerelol");
+    assert_eq!(parse_good_toml.twitter.consumer_key, "rand consumer key");
+    assert_eq!(parse_good_toml.twitter.consumer_secret, "secret");
+    assert_eq!(parse_good_toml.twitter.access_key, "rand access key");
+    assert_eq!(parse_good_toml.twitter.access_secret, "super secret");
+
+    assert_eq!(parse_good_toml.mastodon.base, "https://m.nintendojo.fr");
+    assert_eq!(parse_good_toml.mastodon.client_id, "rand client id");
+    assert_eq!(parse_good_toml.mastodon.client_secret, "secret");
+    assert_eq!(parse_good_toml.mastodon.redirect, "urn:ietf:wg:oauth:2.0:oob");
+    assert_eq!(parse_good_toml.mastodon.token, "super secret");
+}
+
+#[test]
+#[should_panic(expected = "Cannot open config file tests/no_file.toml: No such file or directory (os error 2)")]
+fn test_parse_no_toml() {
+    let _parse_no_toml = parse_toml("tests/no_file.toml");
+}
+
+#[test]
+#[should_panic(expected = "Cannot parse TOML file tests/bad_test.toml: expected an equals, found a newline at line 1 column 5")]
+fn test_parse_bad_toml() {
+    let _parse_bad_toml = parse_toml("tests/bad_test.toml");
+}
diff --git a/tests/good_test.toml b/tests/good_test.toml
new file mode 100644
index 0000000..f29d112
--- /dev/null
+++ b/tests/good_test.toml
@@ -0,0 +1,19 @@
+[scootaloo]
+
+db_path="/var/random/scootaloo.sqlite"
+cache_path="/tmp/scootaloo"
+
+[twitter]
+username="tamerelol"
+
+consumer_key="rand consumer key"
+consumer_secret="secret"
+access_key="rand access key"
+access_secret="super secret"
+
+[mastodon]
+base = "https://m.nintendojo.fr"
+client_id = "rand client id"
+client_secret = "secret"
+redirect = "urn:ietf:wg:oauth:2.0:oob"
+token = "super secret"