Add tests

crates/ra_proc_macro_srv/src/tests/mod.rs

@@ -0,0 +1,47 @@
+//! proc-macro tests
+
+#[macro_use]
+mod utils;
+use test_utils::assert_eq_text;
+use utils::*;
+
+#[test]
+fn test_derive_serialize_proc_macro() {
+    assert_expand(
+        "serde_derive",
+        "Serialize",
+        "1.0.104",
+        r##"struct Foo {}"##,
+        include_str!("fixtures/test_serialize_proc_macro.txt"),
+    );
+}
+
+#[test]
+fn test_derive_serialize_proc_macro_failed() {
+    assert_expand(
+        "serde_derive",
+        "Serialize",
+        "1.0.104",
+        r##"
+    struct {}
+"##,
+        r##"
+SUBTREE $
+  IDENT   compile_error 4294967295
+  PUNCH   ! [alone] 4294967295
+  SUBTREE {} 4294967295
+    LITERAL "expected identifier" 4294967295
+"##,
+    );
+}
+
+#[test]
+fn test_derive_proc_macro_list() {
+    let res = list("serde_derive", "1.0.104").join("\n");
+
+    assert_eq_text!(
+        &res,
+        r#"Serialize [CustomDerive]
+Deserialize [CustomDerive]"#
+    );
+}