From f1f4c2ea2c5d93d14c2fca7108284c549812f7fe Mon Sep 17 00:00:00 2001
From: ppom <reaction@ppom.me>
Date: Tue, 3 Jun 2025 12:00:00 +0200
Subject: [PATCH] WIP custom Time

Permitting custom de/serialiazing
---
 src/concepts/mod.rs        |   5 +-
 src/concepts/time.rs       | 147 +++++++++++++++++++++++++++++++++++++
 src/daemon/filter/tests.rs |  13 ++--
 src/daemon/mod.rs          |   5 +-
 src/daemon/socket.rs       |   5 +-
 src/daemon/stream.rs       |   5 +-
 src/treedb/helpers.rs      |  38 +++-------
 src/treedb/mod.rs          |  12 ++-
 src/treedb/raw.rs          |  84 ++++++++++++---------
 9 files changed, 227 insertions(+), 87 deletions(-)
 create mode 100644 src/concepts/time.rs

diff --git a/src/concepts/mod.rs b/src/concepts/mod.rs
index a163286..136c84e 100644
--- a/src/concepts/mod.rs
+++ b/src/concepts/mod.rs
@@ -4,6 +4,7 @@ mod filter;
 mod parse_duration;
 mod pattern;
 mod stream;
+mod time;
 
 pub use action::Action;
 pub use config::{Config, Patterns};
@@ -12,10 +13,8 @@ use parse_duration::parse_duration;
 pub use pattern::Pattern;
 use serde::{Deserialize, Serialize};
 pub use stream::Stream;
+pub use time::{Time, TimeDelta};
 
-use chrono::{DateTime, Local};
-
-pub type Time = DateTime<Local>;
 pub type Match = Vec<String>;
 
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
diff --git a/src/concepts/time.rs b/src/concepts/time.rs
new file mode 100644
index 0000000..b29a770
--- /dev/null
+++ b/src/concepts/time.rs
@@ -0,0 +1,147 @@
+use std::ops::{Add, Deref, DerefMut, Sub};
+
+use chrono::{DateTime, Local, TimeZone};
+use serde::{de::Visitor, Deserialize, Serialize};
+
+pub use chrono::TimeDelta;
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Time(DateTime<Local>);
+
+impl Time {
+    pub fn now() -> Time {
+        Time(Local::now())
+    }
+
+    pub fn timestamp_micros(value: i64) -> Result<Time, String> {
+        match Local.timestamp_micros(value) {
+            chrono::offset::LocalResult::Single(time) => Ok(Time(time)),
+            chrono::offset::LocalResult::Ambiguous(a, b) => Err(format!(
+                "number can't represent a UNIX timestamp in microseconds. is {a} or {b}"
+            )),
+            chrono::offset::LocalResult::None => {
+                Err("number can't represent a UNIX timestamp in microseconds".into())
+            }
+        }
+    }
+}
+
+impl Default for Time {
+    fn default() -> Self {
+        Time(Local.timestamp_opt(0, 0).unwrap())
+    }
+}
+
+impl From<DateTime<Local>> for Time {
+    fn from(value: DateTime<Local>) -> Self {
+        Time(value)
+    }
+}
+
+impl Deref for Time {
+    type Target = DateTime<Local>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for Time {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+impl Add<TimeDelta> for Time {
+    type Output = Time;
+
+    fn add(self, rhs: TimeDelta) -> Self::Output {
+        Time(self.0 + rhs)
+    }
+}
+
+impl Sub<Time> for Time {
+    type Output = TimeDelta;
+
+    fn sub(self, rhs: Time) -> Self::Output {
+        self.0 - rhs.0
+    }
+}
+
+impl Sub<TimeDelta> for Time {
+    type Output = Time;
+
+    fn sub(self, rhs: TimeDelta) -> Self::Output {
+        Time(self.0 - rhs)
+    }
+}
+
+impl Serialize for Time {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_i64(DateTime::timestamp_micros(&self.0))
+    }
+}
+
+struct TimeVisitor;
+impl<'de> Visitor<'de> for TimeVisitor {
+    type Value = Time;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        formatter.write_str("an i64 representing a UNIX timestamp in microseconds")
+    }
+
+    fn visit_i64<E>(self, value: i64) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Time::timestamp_micros(value).map_err(E::custom)
+    }
+}
+
+impl<'de> Deserialize<'de> for Time {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        deserializer.deserialize_i64(TimeVisitor)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use chrono::Datelike;
+
+    use super::Time;
+
+    #[test]
+    fn time_creation() {
+        let t0 = Time::timestamp_micros(0);
+        assert!(t0.is_ok());
+        assert_eq!(t0.unwrap().year(), 1970);
+    }
+
+    #[test]
+    fn time_serialize() {
+        let t0 = Time::timestamp_micros(0).unwrap();
+        let json = serde_json::to_string(&t0).unwrap();
+        assert_eq!(json, "0");
+
+        let t1 = Time::timestamp_micros(12345678912345).unwrap();
+        let json = serde_json::to_string(&t1).unwrap();
+        assert_eq!(json, "12345678912345");
+    }
+
+    #[test]
+    fn time_deserialize() {
+        // let t0 = "0";
+        // let des: Time = serde_json::from_str(&t0).unwrap();
+        // assert_eq!(des, Time::timestamp_micros(0).unwrap());
+
+        let t1 = "12345678912345";
+        let des: Time = serde_json::from_str(&t1).unwrap();
+        assert_eq!(des, Time::timestamp_micros(12345678912345).unwrap());
+    }
+}
diff --git a/src/daemon/filter/tests.rs b/src/daemon/filter/tests.rs
index 5a03eaf..4079db7 100644
--- a/src/daemon/filter/tests.rs
+++ b/src/daemon/filter/tests.rs
@@ -5,13 +5,12 @@ use std::{
     time::Duration,
 };
 
-use chrono::{Local, TimeDelta};
 use tempfile::TempPath;
 use tokio::sync::Semaphore;
 
 use super::{filter_ordered_times_db_name, FilterManager, React};
 use crate::{
-    concepts::{Action, Filter, MatchTime, Pattern, Patterns, Time},
+    concepts::{Action, Filter, MatchTime, Pattern, Patterns, Time, TimeDelta},
     daemon::shutdown::ShutdownController,
     tests::TempDatabase,
 };
@@ -111,7 +110,7 @@ async fn three_matches_then_action_then_delayed_action() {
         &bed.az_patterns,
     );
 
-    let bed = bed.part2(filter, Local::now(), None).await;
+    let bed = bed.part2(filter, Time::now(), None).await;
 
     let now = bed.now;
     let now1s = bed.now + TimeDelta::seconds(1);
@@ -241,7 +240,7 @@ async fn one_match_one_action() {
         &bed.az_patterns,
     );
 
-    let bed = bed.part2(filter, Local::now(), None).await;
+    let bed = bed.part2(filter, Time::now(), None).await;
     let now = bed.now;
 
     // No match
@@ -284,7 +283,7 @@ async fn one_match_one_delayed_action() {
         &bed.az_patterns,
     );
 
-    let bed = bed.part2(filter, Local::now(), None).await;
+    let bed = bed.part2(filter, Time::now(), None).await;
     let now = bed.now;
 
     // No match
@@ -355,7 +354,7 @@ async fn one_db_match_one_runtime_match_one_action() {
     let mut db = TempDatabase::default().await;
 
     // Pre-add match
-    let now = Local::now();
+    let now = Time::now();
     let one = vec!["one".to_string()];
     let now1s = now - TimeDelta::seconds(1);
 
@@ -418,7 +417,7 @@ async fn one_outdated_db_match() {
     let mut db = TempDatabase::default().await;
 
     // Pre-add match
-    let now = Local::now();
+    let now = Time::now();
     let one = vec!["one".to_string()];
     let now1s = now - TimeDelta::milliseconds(1001);
 
diff --git a/src/daemon/mod.rs b/src/daemon/mod.rs
index ed5294b..9a2baca 100644
--- a/src/daemon/mod.rs
+++ b/src/daemon/mod.rs
@@ -8,7 +8,6 @@ use std::{
     },
 };
 
-use chrono::Local;
 use tokio::{
     select,
     signal::unix::{signal, SignalKind},
@@ -16,7 +15,7 @@ use tokio::{
 };
 use tracing::{debug, info};
 
-use crate::{concepts::Config, treedb::Database};
+use crate::{concepts::{Config, Time}, treedb::Database};
 use filter::FilterManager;
 pub use shutdown::{ShutdownController, ShutdownDelegate, ShutdownToken};
 use socket::socket_manager;
@@ -52,7 +51,7 @@ pub async fn daemon(
     let mut db = Database::open(config).await?;
 
     // Filter managers
-    let now = Local::now();
+    let now = Time::now();
     let mut state = HashMap::new();
     for stream in config.streams().values() {
         let mut filter_managers = HashMap::new();
diff --git a/src/daemon/socket.rs b/src/daemon/socket.rs
index 178d7f6..98511de 100644
--- a/src/daemon/socket.rs
+++ b/src/daemon/socket.rs
@@ -6,7 +6,6 @@ use std::{
     sync::Arc,
 };
 
-use chrono::Local;
 use futures::{SinkExt, StreamExt};
 use regex::Regex;
 use tokio::net::UnixListener;
@@ -17,7 +16,7 @@ use tokio_util::{
 use tracing::{error, warn};
 
 use crate::{
-    concepts::{Config, Filter, Pattern, Stream},
+    concepts::{Config, Filter, Pattern, Stream, Time},
     protocol::{ClientRequest, ClientStatus, DaemonResponse},
 };
 
@@ -88,7 +87,7 @@ fn answer_order(
         })
         .collect::<Result<BTreeMap<Arc<Pattern>, Regex>, String>>()?;
 
-    let now = Local::now();
+    let now = Time::now();
     let cs: ClientStatus = shared_state
         .iter()
         // stream filtering
diff --git a/src/daemon/stream.rs b/src/daemon/stream.rs
index f78662c..d8ccd32 100644
--- a/src/daemon/stream.rs
+++ b/src/daemon/stream.rs
@@ -1,6 +1,5 @@
 use std::{collections::HashMap, process::Stdio, task::Poll, time::Duration};
 
-use chrono::Local;
 use futures::{FutureExt, StreamExt};
 use tokio::{
     io::{AsyncBufReadExt, BufReader, Lines},
@@ -11,7 +10,7 @@ use tokio::{
 use tracing::{error, info, warn};
 
 use crate::{
-    concepts::{Filter, Stream},
+    concepts::{Filter, Stream, Time},
     daemon::filter::FilterManager,
 };
 
@@ -126,7 +125,7 @@ async fn handle_io(
     loop {
         match lines.next().await {
             Some(Ok(line)) => {
-                let now = Local::now();
+                let now = Time::now();
                 for manager in filter_managers.values() {
                     manager.handle_line(&line, now);
                 }
diff --git a/src/treedb/helpers.rs b/src/treedb/helpers.rs
index 636aea1..6d6d015 100644
--- a/src/treedb/helpers.rs
+++ b/src/treedb/helpers.rs
@@ -1,6 +1,5 @@
 use std::collections::BTreeSet;
 
-use chrono::{DateTime, Local};
 use serde_json::Value;
 
 use crate::concepts::{Match, MatchTime, Time};
@@ -17,11 +16,7 @@ pub fn to_u64(val: &Value) -> Result<u64, String> {
 
 /// Tries to convert a [`Value`] into a [`Time`]
 pub fn to_time(val: &Value) -> Result<Time, String> {
-    Ok(
-        DateTime::parse_from_rfc3339(val.as_str().ok_or("not a number")?)
-            .map_err(|err| err.to_string())?
-            .with_timezone(&Local),
-    )
+    Ok(Time::timestamp_micros(val.as_i64().ok_or("not an i64")?)?)
 }
 
 /// Tries to convert a [`Value`] into a [`Match`]
@@ -55,7 +50,6 @@ pub fn to_timeset(val: &Value) -> Result<BTreeSet<Time>, String> {
 mod tests {
     use std::collections::BTreeMap;
 
-    use chrono::TimeZone;
     use serde_json::Map;
 
     use super::*;
@@ -86,14 +80,14 @@ mod tests {
     #[test]
     fn test_to_time() {
         assert_eq!(
-            to_time(&"1970-01-01T01:02:03.456+01:00".into()).unwrap(),
-            Local.timestamp_millis_opt(123456).unwrap(),
+            to_time(&1234567890.into()).unwrap(),
+            Time::timestamp_micros(1234567890).unwrap(),
         );
-        assert!(to_time(&(u64::MAX.into())).is_err());
+        assert!(to_time(&i64::MAX.into()).is_err());
 
         assert!(to_time(&(["ploup"].into())).is_err());
         assert!(to_time(&(true.into())).is_err());
-        assert!(to_time(&(12345.into())).is_err());
+        assert!(to_time(&("12345".into())).is_err());
         assert!(to_time(&(None::<String>.into())).is_err());
     }
 
@@ -115,22 +109,14 @@ mod tests {
     #[test]
     fn test_to_timeset() {
         assert_eq!(
-            to_timeset(&(["1970-01-01T01:20:34.567+01:00"].into())),
-            Ok(BTreeSet::from([Local
-                .timestamp_millis_opt(1234567)
-                .unwrap()]))
+            to_timeset(&([123456789].into())),
+            Ok(BTreeSet::from([Time::timestamp_micros(123456789).unwrap()]))
         );
         assert_eq!(
-            to_timeset(
-                &([
-                    "1970-01-01T01:00:00.008+01:00",
-                    "1970-01-01T01:02:03.456+01:00"
-                ]
-                .into())
-            ),
+            to_timeset(&([8, 123456].into())),
             Ok(BTreeSet::from([
-                Local.timestamp_millis_opt(8).unwrap(),
-                Local.timestamp_millis_opt(123456).unwrap()
+                Time::timestamp_micros(8).unwrap(),
+                Time::timestamp_micros(123456).unwrap()
             ]))
         );
         assert!(to_timeset(&[Value::from("plip"), Value::from(10)].into()).is_err());
@@ -148,13 +134,13 @@ mod tests {
             to_matchtime(&Value::Object(Map::from_iter(
                 BTreeMap::from([
                     ("m".into(), ["plip", "ploup"].into()),
-                    ("t".into(), "1970-01-01T04:25:45.678+01:00".into()),
+                    ("t".into(), 12345678.into()),
                 ])
                 .into_iter()
             ))),
             Ok(MatchTime {
                 m: vec!["plip".into(), "ploup".into()],
-                t: Local.timestamp_millis_opt(12345678).unwrap(),
+                t: Time::timestamp_micros(12345678).unwrap(),
             })
         );
 
diff --git a/src/treedb/mod.rs b/src/treedb/mod.rs
index a12f227..f0c7bcc 100644
--- a/src/treedb/mod.rs
+++ b/src/treedb/mod.rs
@@ -17,7 +17,6 @@ use std::{
     time::Duration,
 };
 
-use chrono::{Local, TimeDelta};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 use serde_json::Value;
 use tokio::{
@@ -27,7 +26,7 @@ use tokio::{
 };
 
 use crate::{
-    concepts::{Config, Time},
+    concepts::{Config, Time, TimeDelta},
     daemon::ShutdownToken,
 };
 
@@ -316,7 +315,7 @@ impl<K: KeyType, V: ValueType> Tree<K, V> {
             tree: self.id.clone(),
             key: serde_json::to_value(k).expect("could not serialize key"),
             value: v.map(|v| serde_json::to_value(v).expect("could not serialize value")),
-            expiry: Local::now() + self.entry_timeout,
+            expiry: Time::now() + self.entry_timeout,
         };
         let tx = self.tx.clone();
         // FIXME what if send fails?
@@ -384,12 +383,11 @@ mod tests {
         path::Path,
     };
 
-    use chrono::{Local, TimeDelta};
     use serde_json::Value;
     use tempfile::{NamedTempFile, TempDir};
     use tokio::fs::{write, File};
 
-    use crate::concepts::Config;
+    use crate::concepts::{Config, Time, TimeDelta};
 
     use super::{
         helpers::*, raw::WriteDB, rotate_db, Database, Entry, KeyType, LoadedDB, Tree, ValueType,
@@ -438,7 +436,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_rotate_db() {
-        let now = Local::now();
+        let now = Time::now();
 
         let expired = now - TimeDelta::seconds(2);
         let valid = now + TimeDelta::seconds(2);
@@ -539,7 +537,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_open_tree() {
-        let now = Local::now();
+        let now = Time::now();
         let now2 = now + TimeDelta::milliseconds(2);
         let now3 = now + TimeDelta::milliseconds(3);
 
diff --git a/src/treedb/raw.rs b/src/treedb/raw.rs
index c2042ff..be92b52 100644
--- a/src/treedb/raw.rs
+++ b/src/treedb/raw.rs
@@ -3,7 +3,6 @@ use std::{
     io::{Error as IoError, Write},
 };
 
-use chrono::{Local, TimeZone};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use thiserror::Error;
@@ -13,6 +12,8 @@ use tokio::{
 };
 use tracing::error;
 
+use crate::concepts::Time;
+
 use super::{Entry, LoadedDB};
 
 const DB_TREE_ID: u64 = 0;
@@ -46,7 +47,7 @@ struct WriteEntry<'a> {
     #[serde(rename = "v")]
     pub value: &'a Option<Value>,
     #[serde(rename = "e")]
-    pub expiry: i64,
+    pub expiry: Time,
 }
 
 /// Entry in custom database format, just read from database
@@ -59,7 +60,7 @@ struct ReadEntry {
     #[serde(rename = "v")]
     pub value: Option<Value>,
     #[serde(rename = "e")]
-    pub expiry: i64,
+    pub expiry: Time,
 }
 
 /// Permits to write entries in a database.
@@ -101,7 +102,7 @@ impl WriteDB {
                         key: &id.into(),
                         value: &Some(entry.tree.clone().into()),
                         // Expiry is not used for special entries
-                        expiry: 0,
+                        expiry: Time::timestamp_micros(0).unwrap(),
                     })
                     .await?;
 
@@ -112,7 +113,7 @@ impl WriteDB {
             tree: tree_id,
             key: &entry.key,
             value: &entry.value,
-            expiry: entry.expiry.timestamp_millis(),
+            expiry: entry.expiry,
         })
         .await
         .map(|bytes_written| bytes_written + written)
@@ -205,7 +206,7 @@ impl ReadDB {
     }
 
     async fn next(&mut self) -> Result<Option<Entry>, DatabaseError> {
-        let now = Local::now().timestamp_millis();
+        let now = Time::now();
         // Loop until we get a non-special value
         let raw_entry = loop {
             self.buffer.clear();
@@ -245,7 +246,7 @@ impl ReadDB {
                 tree: tree.to_owned(),
                 key: raw_entry.key,
                 value: raw_entry.value,
-                expiry: Local.timestamp_millis_opt(raw_entry.expiry).unwrap(),
+                expiry: raw_entry.expiry,
             })),
             None => Err(DatabaseError::MissingKeyId(raw_entry.tree)),
         }
@@ -295,23 +296,25 @@ impl Write for Buffer {
 mod tests {
     use std::collections::HashMap;
 
-    use chrono::{Local, TimeDelta, TimeZone};
     use serde_json::Value;
     use tempfile::NamedTempFile;
     use tokio::fs::{read, write, File};
 
-    use crate::treedb::{
-        raw::{DatabaseError, ReadDB, WriteDB, DB_TREE_ID},
-        Entry,
+    use crate::{
+        concepts::{Time, TimeDelta},
+        treedb::{
+            raw::{DatabaseError, ReadDB, WriteDB, DB_TREE_ID},
+            Entry,
+        },
     };
 
     #[tokio::test]
     async fn write_db_write_entry() {
-        let now = Local::now();
+        let now = Time::now();
         let expired = now - TimeDelta::seconds(2);
-        let expired_ts = expired.timestamp_millis();
+        let expired_ts = expired.timestamp_micros();
         // let valid = now + TimeDelta::seconds(2);
-        // let valid_ts = valid.timestamp_millis();
+        // let valid_ts = valid.timestamp_micros();
 
         let path = NamedTempFile::new().unwrap().into_temp_path();
 
@@ -340,28 +343,39 @@ mod tests {
 
     #[tokio::test]
     async fn read_db_next() {
-        let now = Local::now();
+        let now = Time::now();
 
         let expired = now - TimeDelta::seconds(2);
-        let expired_ts = expired.timestamp_millis();
+        let expired_ts = expired.timestamp_micros();
 
         let valid = now + TimeDelta::seconds(2);
-        let valid_ts = valid.timestamp_millis();
-        // Truncate to millisecond precision
-        let valid = Local.timestamp_millis_opt(valid_ts).unwrap();
+        let valid_ts = valid.timestamp_micros();
+        // Truncate to microsecond precision
+        let valid = Time::timestamp_micros(valid_ts).unwrap();
+
+        let default = Time::default().timestamp_micros();
 
         let path = NamedTempFile::new().unwrap().into_temp_path();
 
+        println!(
+                r#"{{"t": {DB_TREE_ID}, "k": 1, "v": "test_tree", "e": {default}}}
+                 {{"t": 1, "k": "key1", "v": 1, "e": {expired_ts}}}
+                 {{"t": 1, "k": "key2", "v": 2, "e": {valid_ts}}}
+                 malformed entry: not json
+                 {{"t": "tree cant be string", "k": "key2", "v": 2, "e": {valid_ts}}}
+                 {{"t": 1, "k": "missing quote, "v": 2, "e": {valid_ts}}}
+                 {{"t": 3, "k": "missing key id", "v": 2, "e": {valid_ts}}}"#
+        );
         write(
             &path,
             format!(
-                "{{\"t\": {DB_TREE_ID}, \"k\": 1, \"v\": \"test_tree\", \"e\": 0}}
-                 {{\"t\": 1, \"k\": \"key1\", \"v\": 1, \"e\": {expired_ts}}}
-                 {{\"t\": 1, \"k\": \"key2\", \"v\": 2, \"e\": {valid_ts}}}
+                r#"{{"t": {DB_TREE_ID}, "k": 1, "v": "test_tree", "e": {default}}}
+                 {{"t": 1, "k": "key1", "v": 1, "e": {expired_ts}}}
+                 {{"t": 1, "k": "key2", "v": 2, "e": {valid_ts}}}
                  malformed entry: not json
-                 {{\"t\": \"tree cant be string\", \"k\": \"key2\", \"v\": 2, \"e\": {valid_ts}}}
-                 {{\"t\": 1, \"k\": \"missing quote, \"v\": 2, \"e\": {valid_ts}}}
-                 {{\"t\": 3, \"k\": \"missing key id\", \"v\": 2, \"e\": {valid_ts}}}"
+                 {{"t": "tree cant be string", "k": "key2", "v": 2, "e": {valid_ts}}}
+                 {{"t": 1, "k": "missing quote, "v": 2, "e": {valid_ts}}}
+                 {{"t": 3, "k": "missing key id", "v": 2, "e": {valid_ts}}}"#
             ),
         )
         .await
@@ -400,13 +414,13 @@ mod tests {
 
     #[tokio::test]
     async fn read_db_read() {
-        let now = Local::now();
+        let now = Time::now();
 
         let expired = now - TimeDelta::seconds(2);
-        let expired_ts = expired.timestamp_millis();
+        let expired_ts = expired.timestamp_micros();
 
         let valid = now + TimeDelta::seconds(2);
-        let valid_ts = valid.timestamp_millis();
+        let valid_ts = valid.timestamp_micros();
 
         let read_path = NamedTempFile::new().unwrap().into_temp_path();
         let write_path = NamedTempFile::new().unwrap().into_temp_path();
@@ -414,13 +428,13 @@ mod tests {
         write(
             &read_path,
             format!(
-                "{{\"t\": {DB_TREE_ID}, \"k\": 1, \"v\": \"test_tree\", \"e\": 0}}
-                 {{\"t\": 1, \"k\": \"key1\", \"v\": 1, \"e\": {expired_ts}}}
-                 {{\"t\": 1, \"k\": \"key2\", \"v\": 2, \"e\": {valid_ts}}}
+                r#"{{"t": {DB_TREE_ID}, "k": 1, "v": "test_tree", "e": 0}}
+                 {{"t": 1, "k": "key1", "v": 1, "e": {expired_ts}}}
+                 {{"t": 1, "k": "key2", "v": 2, "e": {valid_ts}}}
                  malformed entry: not json
-                 {{\"t\": \"tree cant be string\", \"k\": \"key2\", \"v\": 2, \"e\": {valid_ts}}}
-                 {{\"t\": 1, \"k\": \"missing quote, \"v\": 2, \"e\": {valid_ts}}}
-                 {{\"t\": 3, \"k\": \"missing key id\", \"v\": 2, \"e\": {valid_ts}}}"
+                 {{"t": "tree cant be string", "k": "key2", "v": 2, "e": {valid_ts}}}
+                 {{"t": 1, "k": "missing quote, "v": 2, "e": {valid_ts}}}
+                 {{"t": 3, "k": "missing key id", "v": 2, "e": {valid_ts}}}"#
             ),
         )
         .await
@@ -479,7 +493,7 @@ mod tests {
     #[tokio::test]
     async fn write_then_read_1000() {
         // Generate entries
-        let now = Local::now();
+        let now = Time::now();
         let entries: Vec<_> = (0..1000)
             .map(|i| Entry {
                 tree: format!("tree{}", i % 4),