test(toolchain): Show list's behavior

Author: epage

tests/suite/cli_rustup_ui.rs

@@ -405,6 +405,32 @@ fn rustup_toolchain_cmd_link_cmd_help_flag() {
     );
 }
 
+#[tokio::test]
+async fn rustup_toolchain_list() {
+    let name = "rustup_toolchain_list";
+    let cx = CliTestContext::new(Scenario::ArchivesV2).await;
+    cx.config
+        .expect(["rustup", "update", "nightly"])
+        .await
+        .is_ok();
+    cx.config
+        .expect(["rustup", "update", "beta-2015-01-01"])
+        .await
+        .is_ok();
+    cx.config
+        .expect_with_env(
+            ["rustup", "toolchain", "list"],
+            [("RUSTUP_TERM_COLOR", "always")],
+        )
+        .await
+        .with_stdout(Data::read_from(
+            Path::new(&format!("tests/suite/cli_rustup_ui/{name}.stdout.term.svg")),
+            None,
+        ))
+        .with_stderr("")
+        .is_ok();
+}
+
 #[test]
 fn rustup_toolchain_cmd_list_cmd_help_flag() {
     test_help(