Add tests

Makefile

@@ -6,6 +6,7 @@ build:
 	cargo build
 
 test: build
+	cargo test
 	cd example && ../target/debug/deno_bindgen -o bindings/mod.ts && deno test -A --unstable
 
 bench: build

README.md

@@ -28,7 +28,7 @@ fn add(a: u32, b: u32) -> u32 {
 Use the exported functions directly in ESM with TypeScript typings
 
 ```typescript
-import { add } from "@ffi/example";
+import { add } from "./bindings/mod.ts";
 
 add(1, 2);
 ```

deno_bindgen/Cargo.toml

@@ -19,4 +19,7 @@ deno_bindgen_macro = { path = "../deno_bindgen_macro", version = "0.8.1" }
 deno_bindgen_ir = { path = "../deno_bindgen_ir", version = "0.1.0" }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-linkme = "0.3"
+linkme = "0.3"
+
+[dev-dependencies]
+trybuild = "1.0.85"

deno_bindgen/tests/compile_fail/impl_registration.rs

@@ -0,0 +1,15 @@
+use deno_bindgen::deno_bindgen;
+
+// struct Foo is not "registered" in the inventory, so it `impl Foo`
+// is not allowed.
+struct Foo;
+
+#[deno_bindgen]
+impl Foo {
+  #[constructor]
+  fn new() -> Foo {
+    Foo
+  }
+}
+
+fn main() {}

deno_bindgen/tests/compile_fail/impl_registration.stderr

@@ -0,0 +1,12 @@
+error[E0277]: the trait bound `Foo: BindgenType` is not satisfied
+ --> tests/compile_fail/impl_registration.rs:8:6
+  |
+8 | impl Foo {
+  |      ^^^ the trait `BindgenType` is not implemented for `Foo`
+  |
+note: required by a bound in `_assert_impl`
+ --> tests/compile_fail/impl_registration.rs:7:1
+  |
+7 | #[deno_bindgen]
+  | ^^^^^^^^^^^^^^^ required by this bound in `_assert_impl`
+  = note: this error originates in the attribute macro `deno_bindgen` (in Nightly builds, run with -Z macro-backtrace for more info)

deno_bindgen/tests/compile_fail/struct_by_val.rs

@@ -0,0 +1,20 @@
+use deno_bindgen::deno_bindgen;
+
+#[deno_bindgen]
+struct Foo;
+
+#[deno_bindgen]
+impl Foo {
+  #[constructor]
+  fn new() -> Foo {
+    Foo
+  }
+}
+
+#[deno_bindgen]
+fn foo(_foo: Foo) {} // Fail
+
+#[deno_bindgen]
+fn foo2(_foo: &mut Foo) {} // Pass
+
+fn main() {}

deno_bindgen/tests/compile_fail/struct_by_val.stderr

@@ -0,0 +1,15 @@
+error[E0308]: mismatched types
+  --> tests/compile_fail/struct_by_val.rs:15:8
+   |
+15 | fn foo(_foo: Foo) {} // Fail
+   |    --- ^^^^ expected `Foo`, found `&mut _`
+   |    |
+   |    arguments to this function are incorrect
+   |
+   = note:         expected struct `Foo`
+           found mutable reference `&mut _`
+note: function defined here
+  --> tests/compile_fail/struct_by_val.rs:15:4
+   |
+15 | fn foo(_foo: Foo) {} // Fail
+   |    ^^^ ---------

deno_bindgen/tests/pass/constructor_override.rs

@@ -0,0 +1,22 @@
+use deno_bindgen::deno_bindgen;
+
+#[deno_bindgen]
+struct Input {
+  a: i32,
+  b: i32,
+}
+
+#[deno_bindgen]
+impl Input {
+  #[constructor]
+  fn new(a: i32, b: i32) -> Input {
+    Input { a, b }
+  }
+
+  #[constructor]
+  fn new2() -> Input {
+    Input { a: 0, b: 0 }
+  }
+}
+
+fn main() {}

deno_bindgen/tests/pass/simple.rs

@@ -0,0 +1,63 @@
+use deno_bindgen_macro::deno_bindgen;
+
+#[deno_bindgen]
+fn add(a: i32, b: i32) -> i32 {
+  a + b
+}
+
+#[deno_bindgen]
+fn buf_mut(b: &mut [u8]) {
+  b[0] = 99;
+}
+
+#[deno_bindgen]
+fn cstr() -> *const u8 {
+  b"Hello, World!\0".as_ptr()
+}
+
+#[deno_bindgen]
+fn strlen(s: *const u8) -> u32 {
+  let mut len = 0;
+  unsafe {
+    while *s.add(len as usize) != 0 {
+      len += 1;
+    }
+  }
+  len
+}
+
+#[deno_bindgen(non_blocking)]
+fn non_blocking() -> i32 {
+  42
+}
+
+#[deno_bindgen]
+struct Foo {
+  internal: i32,
+}
+
+#[deno_bindgen]
+impl Foo {
+  #[constructor]
+  fn new(internal: i32) -> Foo {
+    Foo { internal }
+  }
+
+  fn bar(&self) -> i32 {
+    42
+  }
+
+  fn baz(&self, a: i32) -> i32 {
+    a
+  }
+
+  fn qux(&self, a: i32, b: i32) -> i32 {
+    a + b
+  }
+
+  fn quux(&mut self) {
+    self.internal += 1;
+  }
+}
+
+fn main() {}

deno_bindgen/tests/ui.rs

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

deno_bindgen_macro/Cargo.toml

@@ -22,3 +22,7 @@ serde = { version = "1.0.59", features = ["derive"] }
 serde_json = "1.0.59"
 Inflector = "0.11.4"
 deno_bindgen_ir = { path = "../deno_bindgen_ir", version = "0.1.0" }
+
+[dev-dependencies]
+prettyplease = "0.2.15"
+testing_macros = "0.2.11"