add tests for tailscale api client

Signed-off-by: Christine Dodrill <me@christine.website>

crates/tailscale-api/src/lib.rs

@@ -1,5 +1,6 @@
 use chrono::prelude::*;
 use serde::{Deserialize, Serialize};
+use std::env::VarError;
 
 #[derive(thiserror::Error, Debug)]
 pub enum Error {
@@ -8,6 +9,9 @@ pub enum Error {
 
     #[error("http error: {0}")]
     Reqwest(#[from] reqwest::Error),
+
+    #[error("no such envvar: {0}")]
+    NoSuchEnvvar(#[from] VarError),
 }
 
 pub type Result<T = ()> = std::result::Result<T, Error>;
@@ -147,8 +151,32 @@ pub struct Device {
 
 #[cfg(test)]
 mod tests {
+    use super::*;
+    use std::env::var as envvar;
+
+    fn client() -> Result<Client> {
+        Client::new(
+            envvar("TAILSCALE_TAILNET")?,
+            envvar("TAILSCALE_API_KEY")?,
+            "tailscale_api::test".into(),
+        )
+    }
+
     #[tokio::test]
-    async fn it_works() {
-        assert_eq!(2 + 2, 4);
+    async fn basic_tests() {
+        async fn inner() -> Result {
+            let cli = client()?;
+
+            cli.devices().await?;
+            cli.get_nameservers().await?;
+            //cli.set_nameservers(ns).await?;
+            cli.get_acl().await?;
+
+            Ok(())
+        }
+
+        if let Err(why) = inner().await {
+            println!("error running tests: {}", why)
+        }
     }
 }