feat: 实现 CLI 程序并支持 AST 解析

crates/oxide_cli/tests/cli_smoke.rs

@@ -0,0 +1,64 @@
+use std::process::Command;
+
+#[test]
+fn eval_simple_expression() {
+    let output = Command::new("cargo")
+        .args(["run", "--", "eval", "1 + 2"])
+        .output()
+        .expect("failed to run oxide eval");
+
+    assert!(output.status.success(), "eval 1+2 should exit 0");
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    assert!(
+        stdout.contains("Program"),
+        "output should contain AST node: {stdout}"
+    );
+}
+
+#[test]
+fn eval_syntax_error() {
+    let output = Command::new("cargo")
+        .args(["run", "--", "eval", "function("])
+        .output()
+        .expect("failed to run oxide eval");
+
+    assert!(
+        !output.status.success(),
+        "syntax error should exit non-zero"
+    );
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    assert!(
+        !stderr.is_empty(),
+        "syntax error should produce stderr output"
+    );
+}
+
+#[test]
+fn run_file() {
+    let fixture = concat!(env!("CARGO_MANIFEST_DIR"), "/tests/fixtures/hello.js");
+    let output = Command::new("cargo")
+        .args(["run", "--", "run", fixture])
+        .output()
+        .expect("failed to run oxide run");
+
+    assert!(output.status.success(), "run hello.js should exit 0");
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    assert!(
+        stdout.contains("Program"),
+        "run output should contain AST node"
+    );
+}
+
+#[test]
+fn bench_not_implemented() {
+    let output = Command::new("cargo")
+        .args(["run", "--", "bench"])
+        .output()
+        .expect("failed to run oxide bench");
+
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    assert!(
+        stderr.contains("not yet implemented"),
+        "bench should print not-implemented message"
+    );
+}

crates/oxide_cli/tests/fixtures/hello.js

@@ -0,0 +1 @@
+1 + 2