Add test cases for $nu.config-path change (#6385)

* Add test cases for $nu.config-path change

Part of #6366

Signed-off-by: nibon7 <nibon7@163.com>

* do not start a new process to test default config path

Signed-off-by: nibon7 <nibon7@163.com>

Signed-off-by: nibon7 <nibon7@163.com>

src/tests.rs

@@ -1,4 +1,5 @@
 mod test_conditionals;
+mod test_config_path;
 mod test_converters;
 mod test_custom_commands;
 mod test_engine;

src/tests/test_config_path.rs

@@ -0,0 +1,38 @@
+use nu_test_support::nu;
+
+#[test]
+fn test_default_config_path() {
+    let config_dir = nu_path::config_dir().expect("Could not get config directory");
+    let cwd = std::env::current_dir().expect("Could not get current working directory");
+
+    let config_path = config_dir.join("nushell").join("config.nu");
+    let actual = nu!(cwd: &cwd, "$nu.config-path");
+    assert_eq!(actual.out, config_path.to_string_lossy().to_string());
+
+    let env_path = config_dir.join("nushell").join("env.nu");
+    let actual = nu!(cwd: &cwd, "$nu.env-path");
+    assert_eq!(actual.out, env_path.to_string_lossy().to_string());
+}
+
+#[test]
+fn test_alternate_config_path() {
+    let config_file = "crates/nu-utils/src/sample_config/default_config.nu";
+    let env_file = "crates/nu-utils/src/sample_config/default_env.nu";
+
+    let cwd = std::env::current_dir().expect("Could not get current working directory");
+
+    let config_path =
+        nu_path::canonicalize_with(config_file, &cwd).expect("Could not get config path");
+    let actual = nu!(
+        cwd: &cwd,
+        format!("nu --config {:?} -c '$nu.config-path'", config_path)
+    );
+    assert_eq!(actual.out, config_path.to_string_lossy().to_string());
+
+    let env_path = nu_path::canonicalize_with(env_file, &cwd).expect("Could not get env path");
+    let actual = nu!(
+        cwd: &cwd,
+        format!("nu --env-config {:?} -c '$nu.env-path'", env_path)
+    );
+    assert_eq!(actual.out, env_path.to_string_lossy().to_string());
+}