diff --git a/src/parser.rs b/src/parser.rs
index 934fb24..e9c5643 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -37,7 +37,7 @@ impl<'t> Parser<'t> {
     }
 
     pub fn parse<T: Parsable<'t>>(&mut self) -> PResult<T> {
-        Parsable::parse(self)
+        Parsable::parse_with(self)
     }
     pub fn error(&self, kind: ErrorKind, parsing: Parsing) -> Error {
         Error { parsing, kind, loc: self.loc }
@@ -194,11 +194,14 @@ impl<'t> Parser<'t> {
 }
 
 pub trait Parsable<'t>: Sized {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self>;
+    fn parse(text: &'t str) -> PResult<Self> {
+        Self::parse_with(&mut Parser::new(text))
+    }
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self>;
 }
 
 impl<'t> Parsable<'t> for Statements<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let mut stmts = vec![];
         while p.peek(Parsing::File)?.kind != Kind::Eof {
             stmts.push(p.parse()?)
@@ -208,7 +211,7 @@ impl<'t> Parsable<'t> for Statements<'t> {
 }
 
 impl<'t> Parsable<'t> for Statement<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let token = *p.peek(Parsing::Stmt)?;
         Ok(match token.kind {
             Kind::Comment => {
@@ -222,7 +225,7 @@ impl<'t> Parsable<'t> for Statement<'t> {
     }
 }
 impl<'t> Parsable<'t> for Directive<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Directive;
         let Token { lexeme, kind, pos: _ } = *p.peek(parsing)?;
         let Kind::Directive = kind else { return Err(p.error(Unexpected(kind), parsing)) };
@@ -238,7 +241,7 @@ impl<'t> Parsable<'t> for Directive<'t> {
     }
 }
 impl<'t> Parsable<'t> for Vec<Token<'t>> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Directive;
         let mut tokens = vec![];
         loop {
@@ -252,13 +255,13 @@ impl<'t> Parsable<'t> for Vec<Token<'t>> {
     }
 }
 impl<'t> Parsable<'t> for Instruction<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let start = p.peek(Parsing::Instruction)?.pos.start;
         Ok(Self { kind: p.parse()?, span: Span { start, end: p.loc.end } })
     }
 }
 impl<'t> Parsable<'t> for InstructionKind<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         use crate::lexer::token::OneArg;
         // an instruction starts with an opcode
         Ok(match p.peek(Parsing::Instruction)?.kind() {
@@ -274,7 +277,7 @@ impl<'t> Parsable<'t> for InstructionKind<'t> {
     }
 }
 impl<'t> Parsable<'t> for NoEm {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         match p.next(Parsing::NoEm)?.kind {
             Kind::NoEm(opcode) => Ok(Self { opcode }),
             ty => Err(p.error(Unexpected(ty), Parsing::NoEm)),
@@ -282,7 +285,7 @@ impl<'t> Parsable<'t> for NoEm {
     }
 }
 impl<'t> Parsable<'t> for OneEm<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         Ok(Self {
             opcode: match p.next(Parsing::OneEm)?.kind {
                 Kind::OneEm(opcode) => opcode,
@@ -294,7 +297,7 @@ impl<'t> Parsable<'t> for OneEm<'t> {
     }
 }
 impl<'t> Parsable<'t> for OneArg<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         Ok(Self {
             opcode: match p.next(Parsing::OneArg)?.kind {
                 Kind::OneArg(opcode) => opcode,
@@ -306,7 +309,7 @@ impl<'t> Parsable<'t> for OneArg<'t> {
     }
 }
 impl<'t> Parsable<'t> for TwoArg<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::TwoArg;
         Ok(Self {
             opcode: match p.next(parsing)?.kind {
@@ -320,7 +323,7 @@ impl<'t> Parsable<'t> for TwoArg<'t> {
     }
 }
 impl<'t> Parsable<'t> for Jump<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Jump;
         Ok(Self {
             opcode: match p.next(parsing)?.kind {
@@ -332,21 +335,21 @@ impl<'t> Parsable<'t> for Jump<'t> {
     }
 }
 impl<'t> Parsable<'t> for Reti {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         use crate::lexer::token::OneArg;
         p.assert(Kind::OneArg(OneArg::Reti), Parsing::Reti)?;
         Ok(Reti)
     }
 }
 impl<'t> Parsable<'t> for Br<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         p.assert(Kind::Special(Special::Br), Parsing::Br)?;
         Ok(Self { src: p.parse()? })
     }
 }
 
 impl<'t> Parsable<'t> for Src<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Src;
         Ok(match p.peek(parsing)?.kind {
             Kind::Hash => Src::Immediate(p.then(parsing)?.parse()?), // #imm, #special
@@ -379,7 +382,7 @@ impl<'t> Parsable<'t> for Src<'t> {
     }
 }
 impl<'t> Parsable<'t> for Dst<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Dst;
         Ok(match p.peek(parsing)?.kind {
             Kind::Hash => match p.then(parsing)?.next(parsing)?.kind {
@@ -399,7 +402,7 @@ impl<'t> Parsable<'t> for Dst<'t> {
     }
 }
 impl<'t> Parsable<'t> for JumpDst<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Jump;
         let mut neg = false;
         let out = loop {
@@ -420,7 +423,7 @@ impl<'t> Parsable<'t> for JumpDst<'t> {
     }
 }
 impl<'t> Parsable<'t> for Width {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let out = match p.peek(Parsing::Width)?.kind() {
             Kind::Byte => Width::Byte,
             Kind::Word => Width::Word,
@@ -431,7 +434,7 @@ impl<'t> Parsable<'t> for Width {
     }
 }
 impl<'t> Parsable<'t> for Reg {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let out = match p.peek(Parsing::Reg)?.kind {
             Kind::Reg(r) => r,
             ty => Err(p.error(Unexpected(ty), Parsing::Reg))?,
@@ -441,17 +444,17 @@ impl<'t> Parsable<'t> for Reg {
     }
 }
 impl<'t> Parsable<'t> for Expr<'t> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         p.expr()
     }
 }
 impl<'t, T: Parsable<'t>> Parsable<'t> for Box<T> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         Ok(Box::new(p.parse()?))
     }
 }
 impl<'t, T: Parsable<'t>> Parsable<'t> for Vec<T> {
-    fn parse(p: &mut Parser<'t>) -> PResult<Self> {
+    fn parse_with(p: &mut Parser<'t>) -> PResult<Self> {
         let parsing = Parsing::Vec;
         p.assert(Kind::OpenBrace, parsing)?;
         let mut out = vec![];
@@ -589,3 +592,6 @@ pub mod error {
     }
     impl std::error::Error for Error {}
 }
+
+#[cfg(test)]
+mod tests;