test: add unit tests for rolling file

.github/workflows/ci.yml

@@ -59,7 +59,9 @@ jobs:
       - uses: actions/checkout@v4
       - uses: Swatinem/rust-cache@v2
       - name: Run unit tests
-        run: cargo test -- --nocapture
+        run: |
+          cargo test -- --nocapture
+          cargo test --all-features -- --nocapture
       - name: Run examples
         run: |
           cargo run --example simple_stdio

Cargo.toml

@@ -59,6 +59,10 @@ time = { version = "0.3", features = [
   "macros",
 ], optional = true }
 
+[dev-dependencies]
+rand = "0.8.5"
+tempfile = "3.3"
+
 ## Fastrace dependencies
 [dependencies.fastrace]
 optional = true

src/append/rolling_file/clock.rs

@@ -0,0 +1,79 @@
+// Copyright 2024 tison <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use time::OffsetDateTime;
+
+#[derive(Debug)]
+pub enum Clock {
+    DefaultClock,
+    #[cfg(test)]
+    ManualClock(ManualClock),
+}
+
+impl Clock {
+    pub fn now(&self) -> OffsetDateTime {
+        match self {
+            Clock::DefaultClock => OffsetDateTime::now_utc(),
+            #[cfg(test)]
+            Clock::ManualClock(clock) => clock.now(),
+        }
+    }
+
+    #[cfg(test)]
+    pub fn set_now(&mut self, new_time: OffsetDateTime) {
+        if let Clock::ManualClock(clock) = self {
+            clock.set_now(new_time);
+        }
+    }
+}
+
+/// The time could be reset.
+#[derive(Debug)]
+#[cfg(test)]
+pub struct ManualClock {
+    fixed_time: OffsetDateTime,
+}
+
+#[cfg(test)]
+impl ManualClock {
+    pub fn new(fixed_time: OffsetDateTime) -> ManualClock {
+        ManualClock { fixed_time }
+    }
+
+    fn now(&self) -> OffsetDateTime {
+        self.fixed_time
+    }
+
+    pub fn set_now(&mut self, new_time: OffsetDateTime) {
+        self.fixed_time = new_time;
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use time::macros::datetime;
+
+    use super::*;
+
+    #[test]
+    fn test_manual_clock_adjusting() {
+        let mut clock = ManualClock {
+            fixed_time: datetime!(2023-01-01 12:00:00 UTC),
+        };
+        assert_eq!(clock.now(), datetime!(2023-01-01 12:00:00 UTC));
+
+        clock.set_now(datetime!(2024-01-01 12:00:00 UTC));
+        assert_eq!(clock.now(), datetime!(2024-01-01 12:00:00 UTC));
+    }
+}

src/append/rolling_file/mod.rs

@@ -21,6 +21,7 @@ pub use rolling::RollingFileWriterBuilder;
 pub use rotation::Rotation;
 
 mod append;
+mod clock;
 mod non_blocking;
 mod rolling;
 mod rotation;