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.

2 files changed, 32 insertions, 17 deletions

diff --git a/tests/run-make/wasm-panic-small/Makefile b/tests/run-make/wasm-panic-small/Makefile
deleted file mode 100644
index 16f54521855..00000000000
--- a/tests/run-make/wasm-panic-small/Makefile
+++ /dev/null
@@ -1,17 +0,0 @@
-include ../tools.mk
-
-# only-wasm32-bare
-
-all:
-	$(RUSTC) foo.rs -C lto -O --target wasm32-unknown-unknown --cfg a
-	wc -c < $(TMPDIR)/foo.wasm
-	[ "`wc -c < $(TMPDIR)/foo.wasm`" -lt "1024" ]
-	$(RUSTC) foo.rs -C lto -O --target wasm32-unknown-unknown --cfg b
-	wc -c < $(TMPDIR)/foo.wasm
-	[ "`wc -c < $(TMPDIR)/foo.wasm`" -lt "5120" ]
-	$(RUSTC) foo.rs -C lto -O --target wasm32-unknown-unknown --cfg c
-	wc -c < $(TMPDIR)/foo.wasm
-	[ "`wc -c < $(TMPDIR)/foo.wasm`" -lt "5120" ]
-	$(RUSTC) foo.rs -C lto -O --target wasm32-unknown-unknown --cfg d
-	wc -c < $(TMPDIR)/foo.wasm
-	[ "`wc -c < $(TMPDIR)/foo.wasm`" -lt "5120" ]
diff --git a/tests/run-make/wasm-panic-small/rmake.rs b/tests/run-make/wasm-panic-small/rmake.rs
new file mode 100644
index 00000000000..0260485f744
--- /dev/null
+++ b/tests/run-make/wasm-panic-small/rmake.rs
@@ -0,0 +1,32 @@
+#![deny(warnings)]
+
+extern crate run_make_support;
+
+use run_make_support::{out_dir, rustc};
+
+fn main() {
+    if std::env::var("TARGET").unwrap() != "wasm32-wasip1" {
+        return;
+    }
+
+    test("a");
+    test("b");
+    test("c");
+    test("d");
+}
+
+fn test(cfg: &str) {
+    eprintln!("running cfg {cfg:?}");
+    rustc()
+        .arg("foo.rs")
+        .arg("--target=wasm32-wasip1")
+        .arg("-Clto")
+        .arg("-O")
+        .arg("--cfg")
+        .arg(cfg)
+        .run();
+
+    let bytes = std::fs::read(&out_dir().join("foo.wasm")).unwrap();
+    println!("{}", bytes.len());
+    assert!(bytes.len() < 40_000);
+}