Add ui tests for #[component]

packages/sycamore-macro/src/component/mod.rs

@@ -150,7 +150,7 @@ impl Parse for ComponentFunction {
             }
             item => Err(syn::Error::new_spanned(
                 item,
-                "`function_component` attribute can only be applied to functions",
+                "`component` attribute can only be applied to functions",
             )),
         }
     }

packages/sycamore-macro/tests/component/component-fail.rs

@@ -0,0 +1,55 @@
+use sycamore::prelude::*;
+
+/// Missing return type.
+#[component(Comp1<G>)]
+fn comp1() {
+    todo!();
+}
+
+/// Missing component name.
+#[component]
+fn comp2() -> Template<G> {
+    todo!();
+}
+
+/// Missing generic param.
+#[component(Comp3)]
+fn comp3() -> Template<G> {
+    todo!();
+}
+
+#[component(Comp4<G>)]
+async fn comp4() -> Template<G> {
+    todo!();
+}
+
+#[component(Comp5<G>)]
+const fn comp5() -> Template<G> {
+    todo!();
+}
+
+#[component(Comp6<G>)]
+extern fn comp6() -> Template<G> {
+    todo!();
+}
+
+#[component(Comp7<G>)]
+fn comp7(self) -> Template<G> {
+    todo!();
+}
+
+#[component(Comp8<G>)]
+fn comp8(one: (), two: ()) -> Template<G> {
+    todo!();
+}
+
+#[component(Comp9<G>)]
+struct AStruct;
+
+#[allow(non_snake_case)]
+#[component(Comp10<G>)]
+fn Comp10() -> Template<G> {
+    todo!();
+}
+
+fn main() {}

packages/sycamore-macro/tests/component/component-fail.stderr

@@ -0,0 +1,63 @@
+error: function must return `sycamore::template::Template`
+ --> $DIR/component-fail.rs:5:1
+  |
+5 | fn comp1() {
+  | ^^^^^^^^^^
+
+error: unexpected end of input, expected an identifier for the component
+  --> $DIR/component-fail.rs:10:1
+   |
+10 | #[component]
+   | ^^^^^^^^^^^^
+   |
+   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: expected a single type param
+  --> $DIR/component-fail.rs:16:1
+   |
+16 | #[component(Comp3)]
+   | ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: async functions can't be components
+  --> $DIR/component-fail.rs:22:1
+   |
+22 | async fn comp4() -> Template<G> {
+   | ^^^^^
+
+error: const functions can't be components
+  --> $DIR/component-fail.rs:27:1
+   |
+27 | const fn comp5() -> Template<G> {
+   | ^^^^^
+
+error: extern functions can't be components
+  --> $DIR/component-fail.rs:32:1
+   |
+32 | extern fn comp6() -> Template<G> {
+   | ^^^^^^
+
+error: function components can't accept a receiver
+  --> $DIR/component-fail.rs:37:10
+   |
+37 | fn comp7(self) -> Template<G> {
+   |          ^^^^
+
+error: function should accept at most one parameter for the prop
+  --> $DIR/component-fail.rs:42:19
+   |
+42 | fn comp8(one: (), two: ()) -> Template<G> {
+   |                   ^^^^^^^
+
+error: `component` attribute can only be applied to functions
+  --> $DIR/component-fail.rs:47:1
+   |
+47 | struct AStruct;
+   | ^^^^^^^^^^^^^^^
+
+error: the component must not have the same name as the function
+  --> $DIR/component-fail.rs:50:13
+   |
+50 | #[component(Comp10<G>)]
+   |             ^^^^^^

packages/sycamore-macro/tests/component/component-pass.rs

@@ -0,0 +1,13 @@
+use sycamore::prelude::*;
+
+#[component(Comp1<G>)]
+fn comp1() -> Template<G> {
+    todo!();
+}
+
+#[component(Comp2<G>)]
+fn comp2(props: ()) -> Template<G> {
+    todo!();
+}
+
+fn main() {}

packages/sycamore-macro/tests/ui.rs

@@ -0,0 +1,17 @@
+#[test]
+fn template_ui() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/template/*-pass.rs");
+    if std::env::var("RUN_UI_TESTS").is_ok() {
+        t.compile_fail("tests/template/*-fail.rs");
+    }
+}
+
+#[test]
+fn component_ui() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/component/*-pass.rs");
+    if std::env::var("RUN_UI_TESTS").is_ok() {
+        t.compile_fail("tests/component/*-fail.rs");
+    }
+}