Split utils into submods

tests/all/utils/manifest.rs

@@ -0,0 +1,34 @@
+use std::fs::File;
+use std::io::prelude::*;
+use std::path::Path;
+
+use failure::Error;
+use serde_json;
+
+#[derive(Deserialize)]
+pub struct NpmPackage {
+    pub name: String,
+    pub description: String,
+    pub version: String,
+    pub license: String,
+    pub repository: Repository,
+    pub files: Vec<String>,
+    pub main: String,
+    pub types: Option<String>,
+}
+
+#[derive(Deserialize)]
+pub struct Repository {
+    #[serde(rename = "type")]
+    pub ty: String,
+    pub url: String,
+}
+
+pub fn read_package_json(path: &Path) -> Result<NpmPackage, Error> {
+    let manifest_path = path.join("pkg").join("package.json");
+    let mut pkg_file = File::open(manifest_path)?;
+    let mut pkg_contents = String::new();
+    pkg_file.read_to_string(&mut pkg_contents)?;
+
+    Ok(serde_json::from_str(&pkg_contents)?)
+}

tests/all/utils/mod.rs

@@ -0,0 +1,36 @@
+use std::path::{Path, PathBuf};
+
+use copy_dir::copy_dir;
+use tempfile;
+
+pub(crate) mod manifest;
+pub(crate) mod readme;
+
+pub struct Fixture {
+    pub dir: tempfile::TempDir,
+    pub path: PathBuf,
+}
+
+/// Copy the given fixture into a unique temporary directory. This allows the
+/// test to mutate the copied fixture without messing up other tests that are
+/// also trying to read from or write to that fixture. The given path should be
+/// relative from the root of the repository, eg
+/// "tests/fixtures/im-from-brooklyn-the-place-where-stars-are-born".
+pub fn fixture<P>(fixture: P) -> Fixture
+where
+    P: AsRef<Path>,
+{
+    let fixture = fixture
+        .as_ref()
+        .canonicalize()
+        .expect("should canonicalize fixture path OK");
+    let dir = tempfile::tempdir().expect("should create temporary directory OK");
+    let path = dir.path().join("wasm-pack");
+    println!(
+        "wasm-pack: copying test fixture '{}' to temporary directory '{}'",
+        fixture.display(),
+        path.display()
+    );
+    copy_dir(fixture, &path).expect("should copy fixture directory into temporary directory OK");
+    Fixture { dir, path }
+}

tests/all/utils/readme.rs

@@ -0,0 +1,13 @@
+use std::fs::File;
+use std::io::Read;
+use std::path::Path;
+
+use failure::Error;
+
+pub fn read_file(path: &Path) -> Result<String, Error> {
+    let mut file = File::open(path)?;
+    let mut contents = String::new();
+    file.read_to_string(&mut contents)?;
+
+    Ok(contents)
+}