mirror of
https://github.com/fluencelabs/wasm-bindgen
synced 2025-06-12 20:41:24 +00:00
Start implementing a test suite for the CLI
We have very few tests today so this starts to add the basics of a test suite which compiles Cargo projects on-the-fly which will hopefully help us bolster the amount of assertions we can make about the output.
This commit is contained in:
Alex Crichton
138
crates/cli/tests/wasm-bindgen/main.rs
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138
crates/cli/tests/wasm-bindgen/main.rs
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//! A small test suite for the `wasm-bindgen` CLI command itself
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//!
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//! This test suite is intended to exercise functionality of the CLI in terms of
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//! errors and such. It is not intended for comprehensive behavior testing, as
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//! that should all be placed in the top-level `tests` directory for the
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//! `wasm-bindgen` crate itself.
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//!
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//! Assertions about errors in `wasm-bindgen` or assertions about the output of
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//! `wasm-bindgen` should all be placed in this test suite, however. Currently
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//! it is largely based off actually running `cargo build` at test time which is
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//! quite expensive, so it's recommended that this test suite doesn't become too
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//! large!
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use assert_cmd::prelude::*;
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use predicates::str;
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use std::env;
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use std::fs;
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use std::path::PathBuf;
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use std::process::Command;
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fn target_dir() -> PathBuf {
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let mut dir = PathBuf::from(env::current_exe().unwrap());
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dir.pop(); // current exe
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if dir.ends_with("deps") {
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dir.pop();
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}
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dir.pop(); // debug and/or release
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return dir;
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}
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fn repo_root() -> PathBuf {
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let mut repo_root = env::current_dir().unwrap();
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repo_root.pop(); // remove 'cli'
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repo_root.pop(); // remove 'crates'
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repo_root
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}
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struct Project {
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root: PathBuf,
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name: &'static str,
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}
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impl Project {
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fn new(name: &'static str) -> Project {
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let root = target_dir().join("cli-tests").join(name);
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drop(fs::remove_dir_all(&root));
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fs::create_dir_all(&root).unwrap();
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Project { root, name }
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}
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fn file(&mut self, name: &str, contents: &str) -> &mut Project {
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let dst = self.root.join(name);
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fs::create_dir_all(dst.parent().unwrap()).unwrap();
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fs::write(&dst, contents).unwrap();
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self
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}
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fn wasm_bindgen(&mut self, args: &str) -> (Command, PathBuf) {
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let wasm = self.build();
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let output = self.root.join("pkg");
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fs::create_dir_all(&output).unwrap();
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let mut cmd = Command::cargo_bin("wasm-bindgen").unwrap();
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cmd.arg("--out-dir").arg(&output);
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cmd.arg(&wasm);
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for arg in args.split_whitespace() {
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cmd.arg(arg);
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}
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(cmd, output)
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}
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fn build(&mut self) -> PathBuf {
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if !self.root.join("Cargo.toml").is_file() {
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self.file(
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"Cargo.toml",
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&format!(
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"
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[package]
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name = \"{}\"
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authors = []
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version = \"1.0.0\"
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edition = '2018'
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[dependencies]
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wasm-bindgen = {{ path = '{}' }}
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[lib]
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crate-type = ['cdylib']
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[workspace]
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",
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self.name,
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repo_root().display(),
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),
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);
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}
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let target_dir = target_dir();
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Command::new("cargo")
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.current_dir(&self.root)
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.arg("build")
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.arg("--target")
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.arg("wasm32-unknown-unknown")
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.env("CARGO_TARGET_DIR", &target_dir)
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.assert()
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.success();
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target_dir
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.join("wasm32-unknown-unknown")
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.join("debug")
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.join(self.name)
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.with_extension("wasm")
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}
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}
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#[test]
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fn version_useful() {
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Command::cargo_bin("wasm-bindgen")
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.unwrap()
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.arg("-V")
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.assert()
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.stdout(str::ends_with("\n"))
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.stdout(str::starts_with("wasm-bindgen "))
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.success();
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}
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#[test]
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fn works_on_empty_project() {
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let (mut cmd, _out_dir) = Project::new("works_on_empty_project")
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.file(
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"src/lib.rs",
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r#"
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"#,
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)
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.wasm_bindgen("");
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cmd.assert().success();
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}
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mod npm;
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155
crates/cli/tests/wasm-bindgen/npm.rs
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155
crates/cli/tests/wasm-bindgen/npm.rs
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@ -0,0 +1,155 @@
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use crate::*;
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#[test]
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fn no_modules_rejects_npm() {
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let (mut cmd, _out_dir) = Project::new("no_modules_rejects_npm")
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.file(
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"src/lib.rs",
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r#"
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use wasm_bindgen::prelude::*;
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#[wasm_bindgen(module = "foo")]
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extern {
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fn foo();
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}
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#[wasm_bindgen(start)]
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pub fn main() {
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foo();
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}
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"#,
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)
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.file("package.json", "")
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.wasm_bindgen("--no-modules");
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cmd.assert()
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.stderr("\
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error: failed to generate bindings for JS import `foo`
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caused by: import from `foo` module not allowed with `--target no-modules`; use `nodejs`, `web`, or `bundler` target instead
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")
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.failure();
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}
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#[test]
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fn more_package_json_fields_rejected() {
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let (mut cmd, _out_dir) = Project::new("more_package_json_fields_rejected")
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.file(
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"src/lib.rs",
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r#"
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use wasm_bindgen::prelude::*;
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#[wasm_bindgen(module = "foo")]
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extern {
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fn foo();
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}
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#[wasm_bindgen(start)]
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pub fn main() {
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foo();
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}
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"#,
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)
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.file(
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"package.json",
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r#"
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{
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"name": "foo",
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"dependencies": {}
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}
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"#,
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)
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.wasm_bindgen("");
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cmd.assert()
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.stderr(str::is_match("\
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error: NPM manifest found at `.*` can currently only have one key, .*
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").unwrap())
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.failure();
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}
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#[test]
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fn npm_conflict_rejected() {
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let (mut cmd, _out_dir) = Project::new("npm_conflict_rejected")
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.file(
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"Cargo.toml",
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&format!(r#"
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[package]
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name = "npm_conflict_rejected"
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authors = []
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version = "1.0.0"
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edition = '2018'
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[dependencies]
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wasm-bindgen = {{ path = '{}' }}
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bar = {{ path = 'bar' }}
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[lib]
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crate-type = ['cdylib']
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[workspace]
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"#,
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repo_root().display()
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)
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)
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.file(
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"src/lib.rs",
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r#"
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use wasm_bindgen::prelude::*;
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#[wasm_bindgen(module = "bar")]
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extern {
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fn foo();
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}
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#[wasm_bindgen(start)]
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pub fn main() {
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foo();
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bar::foo();
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}
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"#,
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)
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.file(
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"package.json",
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r#"
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{
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"dependencies": {"bar": "0.0.0"}
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}
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"#,
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)
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.file(
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"bar/Cargo.toml",
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&format!(r#"
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[package]
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name = "bar"
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authors = []
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version = "1.0.0"
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edition = '2018'
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[dependencies]
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wasm-bindgen = {{ path = '{}' }}
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"#,
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repo_root().display()
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)
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)
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.file(
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"bar/src/lib.rs",
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r#"
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use wasm_bindgen::prelude::*;
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#[wasm_bindgen(module = "bar")]
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extern {
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pub fn foo();
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}
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"#,
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)
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.file(
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"bar/package.json",
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r#"
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{
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"dependencies": {"bar": "1.0.0"}
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}
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"#,
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)
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.wasm_bindgen("");
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cmd.assert()
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.stderr(str::is_match("dependency on NPM package `bar` specified in two").unwrap())
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.failure();
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}
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