feat: add integration eval tests base

tests/eval/basic.rs

@@ -0,0 +1,20 @@
+use crate::eval::eval_code;
+
+#[test]
+fn eval_print() {
+    assert_eq!(eval_code("print! 1").stdout, "1\n");
+    assert!(!eval_code("print 0").stderr.is_empty());
+    assert_eq!(eval_code("print! \"abc\"").stdout, "abc\n");
+    assert_eq!(eval_code("print! \"0.3\"").stdout, "0.3\n");
+    assert_eq!(eval_code("num = -3\nprint! num * 2").stdout, "-6\n");
+    assert_eq!(eval_code("print True").status.code().unwrap(), 1);
+}
+
+#[test]
+fn eval_assert() {
+    assert!(eval_code("assert True").status.success());
+    assert!(!eval_code("assert False").status.success());
+    assert_eq!(eval_code("assert 1").status.code().unwrap(), 0);
+    assert!(!eval_code("assert 0.2").status.success());
+    assert!(eval_code("flag = True\nassert flag").status.success());
+}

tests/eval/literal.rs

@@ -0,0 +1,8 @@
+use crate::eval::eval_code;
+
+#[test]
+fn eval_int() {
+    assert!(eval_code("assert 100 == 100").status.success());
+    assert_eq!(eval_code("print! \"abc\"").stdout, "abc\n");
+    assert_eq!(eval_code("print! \"0.3\"").stdout, "0.3\n");
+}

tests/eval/mod.rs

@@ -0,0 +1,24 @@
+use erg_common::style::{colors::DEBUG_MAIN, RESET};
+use std::process::Command;
+
+mod basic;
+mod literal;
+
+pub(crate) struct CommandOutput {
+    pub(crate) stdout: String,
+    pub(crate) stderr: String,
+    pub(crate) status: std::process::ExitStatus,
+}
+
+pub(crate) fn eval_code(code: &'static str) -> CommandOutput {
+    println!("{DEBUG_MAIN}[test] eval:\n{code}{RESET}");
+    let output = Command::new(env!(concat!("CARGO_BIN_EXE_", env!("CARGO_PKG_NAME"))))
+        .args(["-c", code])
+        .output()
+        .unwrap();
+    CommandOutput {
+        stdout: String::from_utf8(output.stdout).unwrap(),
+        stderr: String::from_utf8(output.stderr).unwrap(),
+        status: output.status,
+    }
+}

tests/eval_tests.rs

@@ -0,0 +1 @@
+mod eval;