Merge pull request #14 from marcelbuesing/cantool-tests

Add cantools test setup

Author: Pascal Hertleif

Cargo.lock

@@ -18,4 +18,5 @@ members = [
     ".",
     "testing/rust-integration",
     "testing/can-messages",
+    "testing/cantools-messages",
 ]

Cargo.toml

@@ -23,3 +23,10 @@ NOTE: This is only known to work on Linux.
 
 `candump` will output lines like `(1603881557.238509) vcan0 200#0594000000000000`.
 These can be used as test cases in the `rust-itegration` crate.
+
+## Cantools
+
+https://github.com/eerimoq/cantools[cantools] are used for comparing results of packing and unpacking.
+- Install cantools
+- Run `./cantools-messages/generate_example_code` in order to regenerate the c source code which is based on the dbc example.
+- Run `cargo test` in cantools-messages

testing/README.adoc

@@ -0,0 +1,15 @@
+[package]
+name = "cantools-messages"
+version = "0.1.0"
+authors = ["marcelbuesing <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+can-messages = { path = "../can-messages" }
+
+
+[build-dependencies]
+cc = "1.0"
+bindgen = "0.57.0"

testing/cantools-messages/Cargo.toml

@@ -0,0 +1,35 @@
+extern crate bindgen;
+
+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    // Tell cargo to invalidate the built crate whenever the wrapper changes
+    println!("cargo:rerun-if-changed=wrapper.h");
+
+    cc::Build::new()
+        .cpp(true)
+        .file("example.c")
+        .compile("example");
+
+    // The bindgen::Builder is the main entry point
+    // to bindgen, and lets you build up options for
+    // the resulting bindings.
+    let bindings = bindgen::Builder::default()
+        // The input header we would like to generate
+        // bindings for.
+        .header("wrapper.h")
+        // Tell cargo to invalidate the built crate whenever any of the
+        // included header files changed.
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
+        // Finish the builder and generate the bindings.
+        .generate()
+        // Unwrap the Result and panic on failure.
+        .expect("Unable to generate bindings");
+
+    // Write the bindings to the $OUT_DIR/bindings.rs file.
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}