feat: invalid input handling

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cpf-wasm"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Pedro Nascimento <[email protected]>"]
 edition = "2018"
 
@@ -26,6 +26,9 @@ console_error_panic_hook = { version = "0.1.1", optional = true }
 # Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
 wee_alloc = { version = "0.4.2", optional = true }
 
+# JS object bindings
+js-sys = "0.3.37"
+
 [dev-dependencies]
 wasm-bindgen-test = "0.2"
 

README.md

@@ -1,6 +1,7 @@
 # CPF-WASM
 
-A CPF validation lib using web-assembly
+Probably the fastest node cpf validation lib out there.  
+Written in rust, compiled to WASM
 
 ## Installation
 Install using the package manager of your choice, it already ships with typings

src/lib.rs

@@ -1,6 +1,7 @@
 mod utils;
 
 use wasm_bindgen::prelude::*;
+use js_sys::Error;
 
 // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
 // allocator.
@@ -49,6 +50,14 @@ impl CPF {
 
 #[wasm_bindgen]
 pub fn isValid(cpf: String) -> Result<bool, JsValue> {
+    if cpf.len() != 11 {
+        return Err(Error::new("cpf must contain exactly 11 characters").into());
+    }
+
+    if !cpf.chars().all(|ch| ch.is_numeric()) {
+        return Err(Error::new("cpf must contain only numeric characters").into());
+    }
+
     if CPF_BLACKLIST.iter().any(|bad_cpf| bad_cpf == &cpf.as_str()) {
         return Ok(false)
     }
@@ -84,4 +93,20 @@ mod test {
             false
         )
     }
+
+    #[test]
+    fn too_short() {
+        assert_eq!(
+            isValid("1234567890".to_owned()),
+            Err(Error::new("cpf must contain exactly 11 characters").into())
+        )
+    }
+
+    #[test]
+    fn invalid_input() {
+        assert_eq!(
+            isValid("1234567890a".to_owned()),
+            Err(Error::new("cpf must contain only numeric characters").into())
+        )
+    }
 }