Move querystring tests from tide

Author: pvinchon

tests/querystring.rs

@@ -0,0 +1,54 @@
+use http_types::{url::Url, Method};
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+struct Params {
+    msg: String,
+}
+
+#[derive(Deserialize)]
+struct OptionalParams {
+    _msg: Option<String>,
+    _time: Option<u64>,
+}
+
+#[test]
+fn successfully_deserialize_query() {
+    let req = http_types::Request::new(
+        Method::Get,
+        Url::parse("http://example.com/?msg=Hello").unwrap(),
+    );
+
+    let params = req.query::<Params>();
+    assert!(params.is_ok());
+    assert_eq!(params.unwrap().msg, "Hello");
+}
+
+#[test]
+fn unsuccessfully_deserialize_query() {
+    let req = http_types::Request::new(Method::Get, Url::parse("http://example.com/").unwrap());
+
+    let params = req.query::<Params>();
+    assert!(params.is_err());
+    assert_eq!(params.err().unwrap().to_string(), "invalid data");
+}
+
+#[test]
+fn malformatted_query() {
+    let req = http_types::Request::new(
+        Method::Get,
+        Url::parse("http://example.com/?error=should_fail").unwrap(),
+    );
+
+    let params = req.query::<Params>();
+    assert!(params.is_err());
+    assert_eq!(params.err().unwrap().to_string(), "missing field `msg`");
+}
+
+#[test]
+fn empty_query_string_for_struct_with_no_required_fields() {
+    let req = http_types::Request::new(Method::Get, Url::parse("http://example.com").unwrap());
+
+    let params = req.query::<OptionalParams>();
+    assert!(params.is_ok());
+}