add tests for cargo miri and run them on travis

.gitignore

@@ -1,4 +1,4 @@
-/target
+target
 /doc
 tex/*/out
 *.dot

.travis.yml

@@ -11,7 +11,12 @@ before_script:
 script:
 - |
   env RUST_SYSROOT=$HOME/rust travis-cargo build &&
-  env RUST_SYSROOT=$HOME/rust travis-cargo test
+  env RUST_SYSROOT=$HOME/rust travis-cargo test &&
+  env RUST_SYSROOT=$HOME/rust travis-cargo install &&
+  cd cargo-miri-test &&
+  env RUST_SYSROOT=$HOME/rust travis-cargo miri &&
+  env RUST_SYSROOT=$HOME/rust travis-cargo miri test &&
+  cd ..
 notifications:
   email:
     on_success: never

cargo-miri-test/Cargo.lock

@@ -0,0 +1,4 @@
+[root]
+name = "cargo-miri-test"
+version = "0.1.0"
+

cargo-miri-test/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "cargo-miri-test"
+version = "0.1.0"
+authors = ["Oliver Schneider <git-spam-no-reply9815368754983@oli-obk.de>"]
+
+[dependencies]

cargo-miri-test/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    assert_eq!(5, 5);
+}

cargo-miri-test/tests/foo.rs

@@ -0,0 +1,4 @@
+#[test]
+fn bar() {
+    assert_eq!(4, 4);
+}

src/bin/cargo-miri.rs

@@ -84,19 +84,16 @@ fn main() {
         let package = metadata.packages.remove(package_index);
         for target in package.targets {
             let args = std::env::args().skip(skip);
-            if test && target.kind.get(0).map_or(false, |kind| kind == "test") {
+            let kind = target.kind.get(0).expect("badly formatted cargo metadata: target::kind is an empty array");
+            if test && kind == "test" {
                 if let Err(code) = process(vec!["--test".to_string(), target.name].into_iter().chain(args),
                                            &dep_path) {
                     std::process::exit(code);
                 }
-            } else if !test {
-                if target.kind.get(0).map_or(false, |kind| kind == "bin") {
-                    if let Err(code) = process(vec!["--bin".to_string(), target.name].into_iter().chain(args),
-                                               &dep_path) {
-                        std::process::exit(code);
-                    }
-                } else {
-                    panic!("badly formatted cargo metadata: target::kind is an empty array");
+            } else if !test && kind == "bin" {
+                if let Err(code) = process(vec!["--bin".to_string(), target.name].into_iter().chain(args),
+                                           &dep_path) {
+                    std::process::exit(code);
                 }
             }
         }