From cb816b1ea87b24f34eeecfdd98aeeb629915d661 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Sat, 15 Aug 2020 00:19:47 +0200
Subject: Add a proc_macro_test crate

This exports all 3 kinds of proc macros and is useful for testing
---
 crates/proc_macro_srv/Cargo.toml         |  4 +++-
 crates/proc_macro_srv/src/tests/mod.rs   | 15 ++++++++++++++-
 crates/proc_macro_srv/src/tests/utils.rs |  2 +-
 crates/proc_macro_test/Cargo.toml        | 10 ++++++++++
 crates/proc_macro_test/src/lib.rs        | 18 ++++++++++++++++++
 5 files changed, 46 insertions(+), 3 deletions(-)
 create mode 100644 crates/proc_macro_test/Cargo.toml
 create mode 100644 crates/proc_macro_test/src/lib.rs

(limited to 'crates')

diff --git a/crates/proc_macro_srv/Cargo.toml b/crates/proc_macro_srv/Cargo.toml
index 7171f0808..a468b5560 100644
--- a/crates/proc_macro_srv/Cargo.toml
+++ b/crates/proc_macro_srv/Cargo.toml
@@ -21,7 +21,9 @@ test_utils = { path = "../test_utils" }
 [dev-dependencies]
 cargo_metadata = "0.11.1"
 difference = "2.0.0"
-# used as proc macro test target
+
+# used as proc macro test targets
 serde_derive = "1.0.106"
+proc_macro_test = { path = "../proc_macro_test" }
 
 toolchain = { path = "../toolchain" }
diff --git a/crates/proc_macro_srv/src/tests/mod.rs b/crates/proc_macro_srv/src/tests/mod.rs
index 8e6f28abd..1a827cbd7 100644
--- a/crates/proc_macro_srv/src/tests/mod.rs
+++ b/crates/proc_macro_srv/src/tests/mod.rs
@@ -35,7 +35,7 @@ SUBTREE $
 
 #[test]
 fn test_derive_proc_macro_list() {
-    let res = list("serde_derive", "1.0").join("\n");
+    let res = list("serde_derive", "1").join("\n");
 
     assert_eq_text!(
         &res,
@@ -43,3 +43,16 @@ fn test_derive_proc_macro_list() {
 Deserialize [CustomDerive]"#
     );
 }
+
+/// Tests that we find and classify non-derive macros correctly.
+#[test]
+fn list_test_macros() {
+    let res = list("proc_macro_test", "0.0.0").join("\n");
+
+    assert_eq_text!(
+        &res,
+        r#"function_like_macro [FuncLike]
+attribute_macro [Attr]
+DummyTrait [CustomDerive]"#
+    );
+}
diff --git a/crates/proc_macro_srv/src/tests/utils.rs b/crates/proc_macro_srv/src/tests/utils.rs
index 5828512d6..36942147d 100644
--- a/crates/proc_macro_srv/src/tests/utils.rs
+++ b/crates/proc_macro_srv/src/tests/utils.rs
@@ -13,7 +13,7 @@ mod fixtures {
     // Use current project metadata to get the proc-macro dylib path
     pub fn dylib_path(crate_name: &str, version: &str) -> std::path::PathBuf {
         let command = Command::new(toolchain::cargo())
-            .args(&["check", "--message-format", "json"])
+            .args(&["check", "--tests", "--message-format", "json"])
             .output()
             .unwrap()
             .stdout;
diff --git a/crates/proc_macro_test/Cargo.toml b/crates/proc_macro_test/Cargo.toml
new file mode 100644
index 000000000..7b0f64f31
--- /dev/null
+++ b/crates/proc_macro_test/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "proc_macro_test"
+version = "0.0.0"
+license = "MIT OR Apache-2.0"
+authors = ["rust-analyzer developers"]
+edition = "2018"
+
+[lib]
+doctest = false
+proc-macro = true
diff --git a/crates/proc_macro_test/src/lib.rs b/crates/proc_macro_test/src/lib.rs
new file mode 100644
index 000000000..ec2a114a3
--- /dev/null
+++ b/crates/proc_macro_test/src/lib.rs
@@ -0,0 +1,18 @@
+//! Exports a few trivial procedural macros for testing.
+
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn function_like_macro(args: TokenStream) -> TokenStream {
+    args
+}
+
+#[proc_macro_attribute]
+pub fn attribute_macro(_args: TokenStream, item: TokenStream) -> TokenStream {
+    item
+}
+
+#[proc_macro_derive(DummyTrait)]
+pub fn derive_macro(_item: TokenStream) -> TokenStream {
+    TokenStream::new()
+}
-- 
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