add trybuild tests for OpenapiType and Resource derive macros

tests/ui/openapi_type_enum_with_fields.rs

@@ -0,0 +1,14 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+enum Food
+{
+	Pasta,
+	Pizza { pineapple : bool },
+	Rice,
+	Other(String)
+}
+
+fn main()
+{
+}

tests/ui/openapi_type_enum_with_fields.stderr

@@ -0,0 +1,11 @@
+error: #[derive(OpenapiType)] does not support enum variants with fields
+ --> $DIR/openapi_type_enum_with_fields.rs:7:2
+  |
+7 |     Pizza { pineapple : bool },
+  |     ^^^^^
+
+error: #[derive(OpenapiType)] does not support enum variants with fields
+ --> $DIR/openapi_type_enum_with_fields.rs:9:2
+  |
+9 |     Other(String)
+  |     ^^^^^

tests/ui/openapi_type_nullable_non_bool.rs

@@ -0,0 +1,12 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+struct Foo
+{
+	#[openapi(nullable = "yes, please")]
+	bar : String
+}
+
+fn main()
+{
+}

tests/ui/openapi_type_nullable_non_bool.stderr

@@ -0,0 +1,5 @@
+error: Expected bool
+ --> $DIR/openapi_type_nullable_non_bool.rs:6:23
+  |
+6 |     #[openapi(nullable = "yes, please")]
+  |                          ^^^^^^^^^^^^^

tests/ui/openapi_type_rename_non_string.rs

@@ -0,0 +1,12 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+struct Foo
+{
+	#[openapi(rename = 42)]
+	bar : String
+}
+
+fn main()
+{
+}

tests/ui/openapi_type_rename_non_string.stderr

@@ -0,0 +1,5 @@
+error: Expected string literal
+ --> $DIR/openapi_type_rename_non_string.rs:6:21
+  |
+6 |     #[openapi(rename = 42)]
+  |                        ^^

tests/ui/openapi_type_tuple_struct.rs

@@ -0,0 +1,8 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+struct Foo(String);
+
+fn main()
+{
+}

tests/ui/openapi_type_tuple_struct.stderr

@@ -0,0 +1,5 @@
+error: #[derive(OpenapiType)] does not support unnamed fields
+ --> $DIR/openapi_type_tuple_struct.rs:4:11
+  |
+4 | struct Foo(String);
+  |           ^^^^^^^^

tests/ui/openapi_type_union.rs

@@ -0,0 +1,12 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+union IntOrPointer
+{
+	int: u64,
+	pointer: *mut String
+}
+
+fn main()
+{
+}

tests/ui/openapi_type_union.stderr

@@ -0,0 +1,5 @@
+error: #[derive(OpenapiType)] only works for structs and enums
+ --> $DIR/openapi_type_union.rs:4:1
+  |
+4 | union IntOrPointer
+  | ^^^^^

tests/ui/openapi_type_unknown_key.rs

@@ -0,0 +1,12 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(OpenapiType)]
+struct Foo
+{
+	#[openapi(like = "pizza")]
+	bar : String
+}
+
+fn main()
+{
+}

tests/ui/openapi_type_unknown_key.stderr

@@ -0,0 +1,5 @@
+error: Unknown key
+ --> $DIR/openapi_type_unknown_key.rs:6:12
+  |
+6 |     #[openapi(like = "pizza")]
+  |               ^^^^

tests/ui/resource_unknown_method.rs

@@ -0,0 +1,14 @@
+#[macro_use] extern crate gotham_restful;
+
+#[derive(Resource)]
+#[resource(read_any)]
+struct FooResource;
+
+#[read_all(FooResource)]
+fn read_all()
+{
+}
+
+fn main()
+{
+}

tests/ui/resource_unknown_method.stderr

@@ -0,0 +1,14 @@
+error: Unknown method: `read_any'
+ --> $DIR/resource_unknown_method.rs:4:12
+  |
+4 | #[resource(read_any)]
+  |            ^^^^^^^^
+
+error[E0277]: the trait bound `FooResource: gotham_restful::Resource` is not satisfied
+ --> $DIR/resource_unknown_method.rs:7:1
+  |
+7 | #[read_all(FooResource)]
+  | ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `gotham_restful::Resource` is not implemented for `FooResource`
+  |
+  = help: see issue #48214
+  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)