added tests for --out-name flag

src/manifest/mod.rs

@@ -349,7 +349,7 @@ impl CrateData {
     }
 
     /// Get the prefix for output file names
-    fn name_prefix(&self) -> String {
+    pub fn name_prefix(&self) -> String {
         match &self.out_name {
             Some(value) => value.clone(),
             None => self.crate_name(),

tests/all/manifest.rs

@@ -21,6 +21,22 @@ fn it_gets_the_crate_name_provided_path() {
     assert_eq!(crate_data.crate_name(), "js_hello_world");
 }
 
+#[test]
+fn it_gets_the_default_name_prefix() {
+    let path = &PathBuf::from(".");
+    let crate_data = manifest::CrateData::new(&path, None).unwrap();
+    let name = crate_data.name_prefix();
+    assert_eq!(name, "wasm_pack");
+}
+
+#[test]
+fn it_gets_the_name_prefix_passed_from_cli() {
+    let path = &PathBuf::from(".");
+    let crate_data = manifest::CrateData::new(&path, Some("index".to_owned())).unwrap();
+    let name = crate_data.name_prefix();
+    assert_eq!(name, "index");
+}
+
 #[test]
 fn it_checks_has_cdylib_default_path() {
     let fixture = fixture::no_cdylib();
@@ -215,6 +231,37 @@ fn it_creates_a_pkg_json_with_correct_files_on_nomodules() {
     assert_eq!(actual_files, expected_files);
 }
 
+#[test]
+fn it_creates_a_package_json_with_correct_files_when_out_name_is_provided() {
+    let fixture = fixture::js_hello_world();
+    let out_dir = fixture.path.join("pkg");
+    let crate_data = manifest::CrateData::new(&fixture.path, Some("index".to_owned())).unwrap();
+    wasm_pack::command::utils::create_pkg_dir(&out_dir).unwrap();
+    assert!(crate_data
+        .write_package_json(&out_dir, &None, false, &Target::Bundler)
+        .is_ok());
+    let package_json_path = &fixture.path.join("pkg").join("package.json");
+    fs::metadata(package_json_path).unwrap();
+    utils::manifest::read_package_json(&fixture.path, &out_dir).unwrap();
+    let pkg = utils::manifest::read_package_json(&fixture.path, &out_dir).unwrap();
+    assert_eq!(pkg.name, "js-hello-world");
+    assert_eq!(pkg.repository.ty, "git");
+    assert_eq!(
+        pkg.repository.url,
+        "https://github.com/rustwasm/wasm-pack.git"
+    );
+    assert_eq!(pkg.module, "index.js");
+    assert_eq!(pkg.types, "index.d.ts");
+    assert_eq!(pkg.side_effects, "false");
+
+    let actual_files: HashSet<String> = pkg.files.into_iter().collect();
+    let expected_files: HashSet<String> = ["index_bg.wasm", "index.d.ts", "index.js"]
+        .iter()
+        .map(|&s| String::from(s))
+        .collect();
+    assert_eq!(actual_files, expected_files);
+}
+
 #[test]
 fn it_creates_a_pkg_json_in_out_dir() {
     let fixture = fixture::js_hello_world();