Use test-utils for all zkvms (#88)

tests/risc0/basic/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "ere-test-risc0-guest"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+
+[dependencies]
+risc0-zkvm = { version = "2.3.1", default-features = false, features = ['std', 'unstable'] }
+test-utils = { path = "../../../crates/test-utils" }

tests/risc0/basic/src/main.rs

@@ -0,0 +1,15 @@
+use risc0_zkvm::guest::env;
+use test_utils::guest::BasicStruct;
+
+fn main() {
+    // Read `Hello world` bytes.
+    let bytes = env::read_frame();
+    assert_eq!(String::from_utf8_lossy(&bytes), "Hello world");
+
+    // Read `BasicStruct`.
+    let basic_struct = env::read::<BasicStruct>();
+    let output = basic_struct.output();
+
+    // Write `output`
+    env::commit(&output);
+}