Fix feature-gating of test-programs (#612)

* Fix feature-gating of test-programs

This commit fixes bugs in enabling feature-gating of `test-programs`
which was introduced in #600. It turns out, #600 accidentally
disabled `test-programs` from ever running, and this commit fixes
that.

* Fix the CI

crates/test-programs/Cargo.toml

@@ -23,3 +23,6 @@ tempfile = "3.1.0"
 os_pipe = "0.9"
 anyhow = "1.0.19"
 wat = "1.0.2"
+
+[features]
+test_programs = []

crates/test-programs/build.rs

@@ -4,11 +4,11 @@
 //! to automatically run the files in parallel.
 
 fn main() {
-    #[cfg(features = "test-programs")]
+    #[cfg(feature = "test_programs")]
     wasi_tests::build_and_generate_tests()
 }
 
-#[cfg(features = "test-programs")]
+#[cfg(feature = "test_programs")]
 mod wasi_tests {
     use std::env;
     use std::fs::{read_dir, DirEntry, File};
@@ -16,7 +16,7 @@ mod wasi_tests {
     use std::path::{Path, PathBuf};
     use std::process::{Command, Stdio};
 
-    fn build_and_generate_tests() {
+    pub(super) fn build_and_generate_tests() {
         // Validate if any of test sources are present and if they changed
         // This should always work since there is no submodule to init anymore
         let bin_tests = std::fs::read_dir("wasi-tests/src/bin").unwrap();

crates/test-programs/tests/wasm_tests/main.rs

@@ -1,4 +1,4 @@
-#![cfg(features = "test-programs")]
+#![cfg(feature = "test_programs")]
 mod runtime;
 mod utils;