Convert some WebAssembly run-make tests to Rust

This commit rewrites a number of `run-make` tests centered around wasm
to instead use `rmake.rs` and additionally use the `wasm32-wasip1`
target instead of `wasm32-unknown-unknown`. Testing no longer requires
Node.js and additionally uses the `wasmparser` crate from crates.io to
parse outputs and power assertions.

3 files changed, 28 insertions, 44 deletions

diff --git a/tests/run-make/wasm-custom-section/Makefile b/tests/run-make/wasm-custom-section/Makefile
deleted file mode 100644
index 2f7d38c2736..00000000000
--- a/tests/run-make/wasm-custom-section/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-include ../tools.mk
-
-# only-wasm32-bare
-
-all:
-	$(RUSTC) foo.rs --target wasm32-unknown-unknown
-	$(RUSTC) bar.rs -C lto -O --target wasm32-unknown-unknown
-	$(NODE) foo.js $(TMPDIR)/bar.wasm
diff --git a/tests/run-make/wasm-custom-section/foo.js b/tests/run-make/wasm-custom-section/foo.js
deleted file mode 100644
index 57a0f50732d..00000000000
--- a/tests/run-make/wasm-custom-section/foo.js
+++ /dev/null
@@ -1,36 +0,0 @@
-const fs = require('fs');
-const process = require('process');
-const assert = require('assert');
-const buffer = fs.readFileSync(process.argv[2]);
-
-let m = new WebAssembly.Module(buffer);
-let sections = WebAssembly.Module.customSections(m, "baz");
-console.log('section baz', sections);
-assert.strictEqual(sections.length, 1);
-let section = new Uint8Array(sections[0]);
-console.log('contents', section);
-assert.strictEqual(section.length, 2);
-assert.strictEqual(section[0], 7);
-assert.strictEqual(section[1], 8);
-
-sections = WebAssembly.Module.customSections(m, "bar");
-console.log('section bar', sections);
-assert.strictEqual(sections.length, 1, "didn't pick up `bar` section from dependency");
-section = new Uint8Array(sections[0]);
-console.log('contents', section);
-assert.strictEqual(section.length, 2);
-assert.strictEqual(section[0], 3);
-assert.strictEqual(section[1], 4);
-
-sections = WebAssembly.Module.customSections(m, "foo");
-console.log('section foo', sections);
-assert.strictEqual(sections.length, 1, "didn't create `foo` section");
-section = new Uint8Array(sections[0]);
-console.log('contents', section);
-assert.strictEqual(section.length, 4, "didn't concatenate `foo` sections");
-assert.strictEqual(section[0], 5);
-assert.strictEqual(section[1], 6);
-assert.strictEqual(section[2], 1);
-assert.strictEqual(section[3], 2);
-
-process.exit(0);
diff --git a/tests/run-make/wasm-custom-section/rmake.rs b/tests/run-make/wasm-custom-section/rmake.rs
new file mode 100644
index 00000000000..9ad152695ec
--- /dev/null
+++ b/tests/run-make/wasm-custom-section/rmake.rs
@@ -0,0 +1,28 @@
+extern crate run_make_support;
+
+use run_make_support::{out_dir, rustc, wasmparser};
+use std::collections::HashMap;
+
+fn main() {
+    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
+        return;
+    }
+
+    rustc().arg("foo.rs").arg("--target=wasm32-wasip1").run();
+    rustc().arg("bar.rs").arg("--target=wasm32-wasip1").arg("-Clto").arg("-O").run();
+
+    let file = std::fs::read(&out_dir().join("bar.wasm")).unwrap();
+
+    let mut custom = HashMap::new();
+    for payload in wasmparser::Parser::new(0).parse_all(&file) {
+        let payload = payload.unwrap();
+        if let wasmparser::Payload::CustomSection(s) = payload {
+            let prev = custom.insert(s.name(), s.data());
+            assert!(prev.is_none());
+        }
+    }
+
+    assert_eq!(custom.remove("foo"), Some(&[5, 6, 1, 2][..]));
+    assert_eq!(custom.remove("bar"), Some(&[3, 4][..]));
+    assert_eq!(custom.remove("baz"), Some(&[7, 8][..]));
+}