Added test for Xargo.toml in parent directory.

tests/smoke.rs

@@ -171,7 +171,13 @@ struct Project {
 }
 
 impl Project {
+    /// Creates a new project with given name in a temporary directory.
     fn new(name: &'static str) -> Result<Self> {
+        Self::new_in(std::env::temp_dir(), name)
+    }
+
+    /// Creates a new project with given name in a sub directory of `dir`.
+    fn new_in(dir: PathBuf, name: &'static str) -> Result<Self> {
         const JSON: &'static str = r#"
 {
     "arch": "arm",
@@ -186,7 +192,7 @@ impl Project {
 }
 "#;
 
-        let td = TempDir::new("xargo").chain_err(|| "couldn't create a temporary directory")?;
+        let td = TempDir::new_in(dir, "xargo").chain_err(|| "couldn't create a temporary directory")?;
 
         xargo()?
             .args(&["init", "--lib", "--vcs", "none", "--name", name])
@@ -367,6 +373,32 @@ fn target_dependencies() {
     run!()
 }
 
+/// Test building a dependency specified as `target.{}.dependencies` in
+/// ../Xargo.toml
+#[cfg(feature = "dev")]
+#[test]
+fn target_dependencies_parentdir() {
+    fn run() -> Result<()> {
+        // need this exact target name to get the right gcc flags
+        const TARGET: &'static str = "riscv32i-unknown-none-elf";
+
+        let td = TempDir::new("xargo").chain_err(|| "couldn't create a temporary directory")?;
+        let project = Project::new_in(td.path().to_path_buf(), TARGET)?;
+        write(&td.path().join("Xargo.toml"), false,
+            r#"
+[target.riscv32i-unknown-none-elf.dependencies.alloc]
+"#,
+        )?;
+        project.build(TARGET)?;
+        assert!(exists("core", TARGET)?);
+        assert!(exists("alloc", TARGET)?);
+
+        Ok(())
+    }
+
+    run!()
+}
+
 /// Test building a dependency specified as `dependencies` in Xargo.toml
 #[cfg(feature = "dev")]
 #[test]