feat: updated bool parsing and added tests

src/parser.rs

@@ -3,6 +3,7 @@ use std::any::type_name;
 use crate::error::EnvError;
 use std::str::FromStr;
 
+/// A trait for types that can be parsed from a string as a number.
 pub trait Number: FromStr<Err: Display> {}
 
 impl Number for i8 {}
@@ -20,11 +21,14 @@ impl Number for usize {}
 impl Number for f32 {}
 impl Number for f64 {}
 
+/// Parses a string as a boolean value.
 pub fn parse_bool(value: &str) -> Result<bool, EnvError> {
     if value.to_lowercase() == "t" { return Ok(true) }
     if value.to_lowercase() == "f" { return Ok(false) }
     if value == "1" { return Ok(true) }
     if value == "0" { return Ok(false) }
+    if value == "yes" { return Ok(true) }
+    if value == "no" { return Ok(false) }
 
     match value.parse::<bool>() {
         Ok(value) => Ok(value),
@@ -32,6 +36,7 @@ pub fn parse_bool(value: &str) -> Result<bool, EnvError> {
     }
 }
 
+/// Parses a string as a number of the specified type.
 pub fn parse_number<T: Number>(value: &str) -> Result<T, EnvError> {
     match value.parse::<T>() {
         Ok(value) => Ok(value),