Unlucky Launcher v0.0.1-alpha

Rust 原生单文件 Minecraft 启动器：CLI 完整可用（install/launch/accounts/java/diagnose/agent），
MCP server 接入外部 Agent 工具，GUI 开发中。

crates/core/tests/diagnose/loader_reload.rs

@@ -0,0 +1,171 @@
+//! 规则库加载 / 热重载 / 坏文件的降级行为。
+
+use std::fs;
+
+use crate::prelude::*;
+
+const CUSTOM_MEMORY: &str = "\
+version: 1
+category: memory
+rules:
+  - id: memory.custom_only
+    severity: warning
+    pattern: 'CUSTOM TEST SIGNATURE'
+    confidence: 0.9
+    priority: 70
+    cause:
+      key: diagnose.cause.memory.custom_only
+      summary: '测试用自定义规则'
+    fix_action:
+      - kind: seek_help
+    sample: samples/memory/out_of_memory.log
+";
+
+#[test]
+fn embedded_library_is_complete() {
+    let loader = RuleLoader::embedded();
+    assert_eq!(EMBEDDED_RULES.len(), 10, "10 个根因分组各一个 YAML");
+    // 64 = HMCL 59 条全量平移 + 5 条 Vulkan 组（graphics.yaml 末尾的 4 个原因码
+    // + no_graphics_backend）。加规则要同时加样本并同步这个数。
+    assert_eq!(loader.rules().len(), 64);
+    assert!(loader.last_errors().is_empty());
+    assert!(loader.dir().is_none());
+}
+
+#[test]
+fn missing_directory_falls_back_to_embedded() {
+    let dir = temp_dir("loader-missing").join("nope");
+    let loader = RuleLoader::from_dir(&dir);
+    assert_eq!(loader.rules().len(), 64);
+    assert!(loader.last_errors().is_empty());
+}
+
+#[test]
+fn disk_file_replaces_embedded_group() {
+    let dir = temp_dir("loader-override");
+    fs::write(dir.join("memory.yaml"), CUSTOM_MEMORY).expect("写规则文件");
+    let loader = RuleLoader::from_dir(&dir);
+
+    assert_eq!(loader.rules().len(), 63, "memory.yaml 的 2 条被 1 条替换");
+    assert!(loader.last_errors().is_empty());
+    assert!(loader.rule_set().get("memory.custom_only").is_some());
+    assert!(
+        loader.rule_set().get("memory.out_of_memory").is_none(),
+        "同组文件被整份替换"
+    );
+}
+
+#[test]
+fn refresh_picks_up_edits() {
+    let dir = temp_dir("loader-refresh");
+    let mut loader = RuleLoader::from_dir(&dir);
+    assert_eq!(
+        loader.refresh(),
+        ReloadOutcome::Unchanged,
+        "没变就不该重解析"
+    );
+
+    fs::write(dir.join("memory.yaml"), CUSTOM_MEMORY).expect("写规则文件");
+    assert_eq!(
+        loader.refresh(),
+        ReloadOutcome::Reloaded { rules: 63 },
+        "指纹变了应重新加载"
+    );
+    assert!(loader.rule_set().get("memory.custom_only").is_some());
+}
+
+#[test]
+fn broken_yaml_keeps_last_good_rules() {
+    let dir = temp_dir("loader-broken");
+    fs::write(dir.join("memory.yaml"), CUSTOM_MEMORY).expect("写规则文件");
+    let mut loader = RuleLoader::from_dir(&dir);
+    assert_eq!(loader.rules().len(), 63);
+
+    // 用户手改坏了 YAML：保留上一份好规则 + 报错，而不是让诊断能力归零
+    fs::write(
+        dir.join("memory.yaml"),
+        "version: 1\ncategory: memory\nrules: [ oops\n",
+    )
+    .expect("写坏文件");
+    match loader.refresh() {
+        ReloadOutcome::Rejected { errors } => {
+            assert!(!errors.is_empty());
+            assert_eq!(
+                errors[0].kind,
+                unlucky_core::diagnose::loader::LoadErrorKind::Yaml
+            );
+        }
+        other => panic!("应被拒绝：{other:?}"),
+    }
+    assert_eq!(loader.rules().len(), 63, "坏文件不该清空规则库");
+    assert!(loader.rule_set().get("memory.custom_only").is_some());
+    assert!(!loader.last_errors().is_empty());
+}
+
+#[test]
+fn duplicate_rule_id_across_files_is_rejected() {
+    let dir = temp_dir("loader-duplicate");
+    let duplicated = "\
+version: 1
+category: other
+rules:
+  - id: memory.out_of_memory
+    pattern: 'dup'
+    cause:
+      key: diagnose.cause.dup
+      summary: '重复 id'
+";
+    fs::write(dir.join("other.yaml"), duplicated).expect("写规则文件");
+    let loader = RuleLoader::from_dir(&dir);
+
+    assert_eq!(loader.rules().len(), 64, "整体失败后回退内嵌规则集");
+    assert!(loader
+        .last_errors()
+        .iter()
+        .any(|error| error.kind == unlucky_core::diagnose::loader::LoadErrorKind::DuplicateId));
+}
+
+#[test]
+fn unknown_field_is_rejected() {
+    let dir = temp_dir("loader-typo");
+    let typo = "\
+version: 1
+category: other
+rules:
+  - id: other.typo
+    patternn: 'typo in field name'
+    cause:
+      key: diagnose.cause.typo
+      summary: '字段拼错'
+";
+    fs::write(dir.join("other.yaml"), typo).expect("写规则文件");
+    let loader = RuleLoader::from_dir(&dir);
+    assert_eq!(loader.rules().len(), 64);
+    assert!(
+        !loader.last_errors().is_empty(),
+        "deny_unknown_fields 应把拼错的字段报出来"
+    );
+}
+
+#[test]
+fn rule_set_rejects_invalid_regex() {
+    let sources = vec![(
+        "bad.yaml".to_owned(),
+        "\
+version: 1
+category: other
+rules:
+  - id: other.bad_regex
+    pattern: '(unclosed'
+    cause:
+      key: diagnose.cause.bad
+      summary: '坏正则'
+"
+        .to_owned(),
+    )];
+    let errors = RuleSet::from_sources(&sources).expect_err("坏正则应失败");
+    assert_eq!(
+        errors[0].kind,
+        unlucky_core::diagnose::loader::LoadErrorKind::Regex
+    );
+}