Add test for optional backtrace

tests/test_option.rs

@@ -4,23 +4,54 @@
 use std::backtrace::Backtrace;
 use thiserror::Error;
 
+pub mod structs {
+    use super::*;
+
     #[derive(Error, Debug)]
     #[error("...")]
-pub struct OptSourceNoBacktraceStruct {
+    pub struct OptSourceNoBacktrace {
         #[source]
         source: Option<anyhow::Error>,
     }
 
     #[derive(Error, Debug)]
     #[error("...")]
-pub struct OptSourceAlwaysBacktraceStruct {
+    pub struct OptSourceAlwaysBacktrace {
         #[source]
         source: Option<anyhow::Error>,
         backtrace: Backtrace,
     }
 
     #[derive(Error, Debug)]
-pub enum OptSourceNoBacktraceEnum {
+    #[error("...")]
+    pub struct NoSourceOptBacktrace {
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct AlwaysSourceOptBacktrace {
+        source: anyhow::Error,
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct OptSourceOptBacktrace {
+        #[source]
+        source: Option<anyhow::Error>,
+        #[backtrace]
+        backtrace: Option<Backtrace>,
+    }
+}
+
+pub mod enums {
+    use super::*;
+
+    #[derive(Error, Debug)]
+    pub enum OptSourceNoBacktrace {
         #[error("...")]
         Test {
             #[source]
@@ -29,7 +60,7 @@ pub enum OptSourceNoBacktraceEnum {
     }
 
     #[derive(Error, Debug)]
-pub enum OptSourceAlwaysBacktraceEnum {
+    pub enum OptSourceAlwaysBacktrace {
         #[error("...")]
         Test {
             #[source]
@@ -37,3 +68,34 @@ pub enum OptSourceAlwaysBacktraceEnum {
             backtrace: Backtrace,
         },
     }
+
+    #[derive(Error, Debug)]
+    pub enum NoSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum AlwaysSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            source: anyhow::Error,
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+
+    #[derive(Error, Debug)]
+    pub enum OptSourceOptBacktrace {
+        #[error("...")]
+        Test {
+            #[source]
+            source: Option<anyhow::Error>,
+            #[backtrace]
+            backtrace: Option<Backtrace>,
+        },
+    }
+}