Add quickcheck (#1574)

* Move uptime to being a duration value

* Adds our first quickcheck test

crates/nu-cli/src/cli.rs

@@ -776,3 +776,19 @@ pub fn print_err(err: ShellError, host: &dyn Host, source: &Text) {
         );
     });
 }
+
+#[cfg(test)]
+mod tests {
+
+    #[quickcheck]
+    fn quickcheck_parse(data: String) -> bool {
+        if let Ok(lite_pipeline) = nu_parser::lite_parse(&data, 0) {
+            let context = crate::context::Context::basic().unwrap();
+            nu_parser::classify_pipeline(&lite_pipeline, context.registry())
+                .failed
+                .is_none()
+        } else {
+            false
+        }
+    }
+}

crates/nu-cli/src/lib.rs

@@ -7,6 +7,12 @@ extern crate indexmap;
 #[macro_use]
 mod prelude;
 
+#[cfg(test)]
+extern crate quickcheck;
+#[cfg(test)]
+#[macro_use(quickcheck)]
+extern crate quickcheck_macros;
+
 mod cli;
 mod commands;
 mod context;