fix(depcheck): add failing test to repro bug

tests/fixtures/serde-feature/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "serde-serialize"
+description = "an example rust->wasm crate"
+version = "0.1.0"
+authors = ["Ashley Williams <ashley666ashley@gmail.com>"]
+license = "WTFPL"
+repository = "https://github.com/ashleygwilliams/wasm-pack"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies.wasm-bindgen]
+version = "^0.2"
+features = ["serde-serialize"]

tests/fixtures/serde-feature/README.md

@@ -0,0 +1,2 @@
+# js-hello-world
+> an example rust -> wasm project

tests/fixtures/serde-feature/src/lib.rs

@@ -0,0 +1,15 @@
+#![feature(proc_macro, wasm_import_module, wasm_custom_section)]
+
+extern crate wasm_bindgen;
+
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern {
+    fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet(name: &str) {
+    alert(&format!("Hello, {}!", name));
+}

tests/manifest/main.rs

@@ -50,6 +50,14 @@ fn it_checks_has_cdylib_wrong_crate_type() {
     );
 }
 
+#[test]
+fn it_recognizes_a_map_during_depcheck() {
+    let step = wasm_pack::progressbar::Step::new(1);
+    assert!(
+        manifest::check_crate_config(&PathBuf::from("tests/fixtures/serde-feature"), &step).is_ok()
+    );
+}
+
 #[test]
 fn it_creates_a_package_json_default_path() {
     let step = wasm_pack::progressbar::Step::new(1);