cli: add 'rate <passphrase>' subcommand (zxcvbn)

crates/relicario-cli/tests/smart_inputs.rs

@@ -1,6 +1,7 @@
 mod common;
 
 use assert_cmd::Command;
+use predicates::prelude::PredicateBooleanExt;
 use predicates::str::contains;
 
 #[test]
@@ -103,3 +104,35 @@ fn no_groups_cache_env_var_suppresses_write() {
         "groups.cache should not exist when RELICARIO_NO_GROUPS_CACHE=1"
     );
 }
+
+#[test]
+fn rate_strong_passphrase_prints_score_and_guesses() {
+    Command::cargo_bin("relicario").unwrap()
+        .args(["rate", "correct horse battery staple table cocoa rocket spirit ferment"])
+        .assert()
+        .success()
+        .stdout(contains("score:"))
+        .stdout(contains("guesses:"))
+        .stdout(contains("strong"));
+}
+
+#[test]
+fn rate_weak_passphrase_exits_zero_with_weak_label() {
+    // `rate` is informational — does NOT exit nonzero on weak input.
+    // The hard gate lives at `init` (Plan 2B Task 10).
+    Command::cargo_bin("relicario").unwrap()
+        .args(["rate", "password"])
+        .assert()
+        .success()
+        .stdout(contains("very weak").or(contains("weak")));
+}
+
+#[test]
+fn rate_reads_from_stdin_when_arg_is_dash() {
+    Command::cargo_bin("relicario").unwrap()
+        .args(["rate", "-"])
+        .write_stdin("correcthorsebatterystaple\n")
+        .assert()
+        .success()
+        .stdout(contains("score:"));
+}