add tests to check README and licenses are in 'files' field

tests/all/manifest.rs

@@ -5,7 +5,7 @@ use std::path::PathBuf;
 use structopt::StructOpt;
 
 use utils::{self, fixture};
-use wasm_pack::{self, manifest, Cli};
+use wasm_pack::{self, license, manifest, readme, Cli};
 
 #[test]
 fn it_gets_the_crate_name_default_path() {
@@ -368,3 +368,64 @@ fn parse_crate_data_returns_unused_keys_in_cargo_toml() {
 
     assert!(unused_keys.contains("package.metadata.wasm-pack.profile.production"));
 }
+
+#[test]
+fn it_lists_license_files_in_files_field_of_package_json() {
+    let fixture = fixture::dual_license();
+    let out_dir = fixture.path.join("pkg");
+
+    let crate_data = manifest::CrateData::new(&fixture.path).unwrap();
+
+    let step = wasm_pack::progressbar::Step::new(3);
+    wasm_pack::command::utils::create_pkg_dir(&out_dir, &step).unwrap();
+    license::copy_from_crate(&crate_data, &fixture.path, &out_dir, &step).unwrap();
+    crate_data
+        .write_package_json(&out_dir, &None, false, "", &step)
+        .unwrap();
+
+    let package_json_path = &fixture.path.join("pkg").join("package.json");
+    fs::metadata(package_json_path).unwrap();
+    let pkg = utils::manifest::read_package_json(&fixture.path, &out_dir).unwrap();
+
+    assert!(
+        pkg.files.contains(&"LICENSE-WTFPL".to_string()),
+        "LICENSE-WTFPL is not in files: {:?}",
+        pkg.files,
+    );
+
+    assert!(
+        pkg.files.contains(&"LICENSE-MIT".to_string()),
+        "LICENSE-MIT is not in files: {:?}",
+        pkg.files,
+    );
+}
+
+#[test]
+fn it_lists_readme_in_files_field_of_package_json() {
+    let fixture = utils::fixture::Fixture::new();
+    fixture
+        .readme()
+        .hello_world_src_lib()
+        .cargo_toml("readme-test-for-package-json");
+
+    let out_dir = fixture.path.join("pkg");
+
+    let crate_data = manifest::CrateData::new(&fixture.path).unwrap();
+
+    let step = wasm_pack::progressbar::Step::new(3);
+    wasm_pack::command::utils::create_pkg_dir(&out_dir, &step).unwrap();
+    readme::copy_from_crate(&fixture.path, &out_dir, &step).unwrap();
+    crate_data
+        .write_package_json(&out_dir, &None, false, "", &step)
+        .unwrap();
+
+    let package_json_path = &fixture.path.join("pkg").join("package.json");
+    fs::metadata(package_json_path).unwrap();
+    let pkg = utils::manifest::read_package_json(&fixture.path, &out_dir).unwrap();
+
+    assert!(
+        pkg.files.contains(&"README.md".to_string()),
+        "README.md is not in files: {:?}",
+        pkg.files,
+    );
+}