fix(model): resolve deserialization issue with figment (#15)

* make it compatible with `figment`

Author: Lethe10137

Cargo.toml

@@ -28,6 +28,7 @@ statrs = { version = "0.17.1", optional = true}
 
 [dev-dependencies]
 serde_json = "1.0"
+figment = {version = "0.10.19", features = ["json"]}
 
 
 [features]

src/lib.rs

@@ -464,4 +464,76 @@ mod test {
             Some((Bandwidth::from_bps(12132938), Duration::from_millis(100)))
         );
     }
+
+    #[test]
+    #[cfg(feature = "human")]
+    fn test_compatibility_with_figment() {
+        use figment::{
+            providers::{Format, Json},
+            Figment,
+        };
+
+        let config = r##"
+    {
+"RepeatedBwPatternConfig": {
+    "pattern": [
+        {"TraceBwConfig": [["25ms",["10Mbps", "20Mbps"]],["2ms",["11Mbps", "23Mbps"]]]},
+        {"SawtoothBwConfig": {
+                "bottom" : "10Mbps",
+                "top" : "20Mbps",
+                "step" : "1ms",
+                "interval" : "10ms",
+                "duty_ratio" : 0.5
+            }
+        }
+    ],
+    "count": 0
+}
+}
+"##;
+
+        let trace: Box<dyn BwTraceConfig> = Figment::new()
+            .merge(Json::string(config))
+            .extract()
+            .unwrap();
+
+        let mut model = trace.into_model();
+
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(10), Duration::from_millis(25)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(20), Duration::from_millis(25)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(11), Duration::from_millis(2)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(23), Duration::from_millis(2)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(10), Duration::from_millis(1)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(12), Duration::from_millis(1)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(14), Duration::from_millis(1)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(16), Duration::from_millis(1)))
+        );
+        assert_eq!(
+            model.next_bw(),
+            Some((Bandwidth::from_mbps(18), Duration::from_millis(1)))
+        );
+    }
 }

src/model/bw.rs

@@ -661,20 +661,21 @@ impl<'de> Deserialize<'de> for TraceBwConfig {
                 let mut pattern = Vec::new();
 
                 while let Some((duration_str, bandwidths_str)) =
-                    seq.next_element::<(&str, Vec<&str>)>()?
+                    seq.next_element::<(String, Vec<String>)>()?
                 {
-                    let duration = humantime_serde::re::humantime::parse_duration(duration_str)
-                        .map_err(|e| {
-                            serde::de::Error::custom(format!(
-                                "Failed to parse duration '{}': {}",
-                                duration_str, e
-                            ))
-                        })?;
+                    let duration =
+                        humantime_serde::re::humantime::parse_duration(duration_str.as_str())
+                            .map_err(|e| {
+                                serde::de::Error::custom(format!(
+                                    "Failed to parse duration '{}': {}",
+                                    duration_str, e
+                                ))
+                            })?;
 
                     let bandwidths = bandwidths_str
                         .into_iter()
                         .map(|b| {
-                            human_bandwidth::parse_bandwidth(b).map_err(|e| {
+                            human_bandwidth::parse_bandwidth(&b).map_err(|e| {
                                 serde::de::Error::custom(format!(
                                     "Failed to parse bandwidth '{}': {}",
                                     b, e