test(go): add e2e tests for echogo plugin

Author: topheman

crates/pluginlab/tests/e2e_go_plugins.rs

@@ -0,0 +1,62 @@
+mod utils;
+
+#[cfg(test)]
+mod e2e_go_plugins {
+
+    use crate::utils::*;
+
+    use rexpect::spawn;
+
+    const TEST_TIMEOUT: u64 = 10000;
+
+    /**
+     * Lets us change the target directory for the plugins and repl logic.
+     *
+     * See the justfile for examples where we switch to testing both plugins from the filesystem and from the HTTP server.
+     */
+    fn build_command(plugin_files: &[&str], repl_logic_file: &str) -> String {
+        let prefix =
+            std::env::var("WASM_TARGET_DIR").unwrap_or("target/wasm32-wasip1/debug".to_string());
+        let mut command = String::from("target/debug/pluginlab");
+        command.push_str(format!(" --repl-logic {}/{}", prefix, repl_logic_file).as_str());
+        plugin_files.iter().for_each(|file| {
+            command.push_str(format!(" --plugins {}", file).as_str());
+        });
+        println!("Running command: {}", command);
+        command
+    }
+
+    #[test]
+    fn test_echo_plugin() {
+        let project_root = find_project_root();
+        println!("Setting current directory to: {:?}", project_root);
+        std::env::set_current_dir(&project_root).unwrap();
+        let mut session = spawn(
+            &format!(
+                "{} --dir tmp/filesystem --allow-read",
+                &build_command(
+                    &["go_modules/plugin-echo/plugin-echo-go.wasm"],
+                    "repl_logic_guest.wasm"
+                )
+            ),
+            Some(TEST_TIMEOUT),
+        )
+        .expect("Can't launch pluginlab with plugin greet");
+
+        session
+            .exp_string("[Host] Starting REPL host...")
+            .expect("Didn't see startup message");
+        session
+            .exp_string("[Host] Loading plugin:")
+            .expect("Didn't see plugin loading message");
+        session
+            .exp_string("repl(0)>")
+            .expect("Didn't see REPL prompt");
+        session
+            .send_line("echogo hello")
+            .expect("Failed to send command");
+        session
+            .exp_string("hello\r\nrepl(0)>")
+            .expect("Didn't get expected output from echogo plugin");
+    }
+}