add first derive compilation tests

Cargo.toml

@@ -20,8 +20,8 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-quote = "1"
-syn = "2"
+quote = "1.0"
+syn = "2.0"
 
 [lib]
 proc-macro = true

venndb-usage/Cargo.toml

@@ -6,3 +6,6 @@ edition = "2021"
 
 [dependencies]
 venndb = { path = ".." }
+
+[dev-dependencies]
+trybuild = "1"

venndb-usage/tests/compilation_tests.rs

@@ -0,0 +1,11 @@
+#[test]
+fn should_compile() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/compiles/*.rs");
+}
+
+#[test]
+fn should_not_compile() {
+    let t = trybuild::TestCases::new();
+    t.compile_fail("tests/fails/*.rs");
+}

venndb-usage/tests/compiles/derive_struct.rs

@@ -0,0 +1,21 @@
+use venndb::VennDB;
+
+#[derive(Debug, VennDB)]
+struct Employee {
+    id: u32,
+    name: String,
+    is_manager: bool,
+    is_admin: bool,
+    is_active: bool,
+    department: Department,
+}
+
+#[derive(Debug)]
+pub enum Department {
+    Engineering,
+    Sales,
+    Marketing,
+    HR,
+}
+
+fn main() {}

venndb-usage/tests/fails/derive_enum.rs

@@ -0,0 +1,9 @@
+use venndb::VennDB;
+
+#[derive(VennDB)]
+enum MyEnum {
+    A,
+    B,
+}
+
+fn main() {}

venndb-usage/tests/fails/derive_enum.stderr

@@ -0,0 +1,8 @@
+error: Only Structs with named fields are supported
+ --> tests/fails/derive_enum.rs:4:1
+  |
+4 | / enum MyEnum {
+5 | |     A,
+6 | |     B,
+7 | | }
+  | |_^

venndb-usage/tests/fails/derive_tuple_struct.rs

@@ -0,0 +1,6 @@
+use venndb::VennDB;
+
+#[derive(VennDB)]
+struct MyStruct(u32);
+
+fn main() {}

venndb-usage/tests/fails/derive_tuple_struct.stderr

@@ -0,0 +1,5 @@
+error: Only Structs with named fields are supported
+ --> tests/fails/derive_tuple_struct.rs:4:1
+  |
+4 | struct MyStruct(u32);
+  | ^^^^^^^^^^^^^^^^^^^^^