internal/workflow：xref 解析與 stalled 掃描核心邏輯（#7）

完整移植 gitea.py 的 _resolve_xref_targets 與 find_stalled_work： - xref：#N／repo#N／owner/repo#N；單段 repo 僅在存在於組織時解析（PR#50、issue#49 這類寫法自動略過）；owner 需為所屬組織。 Go regexp 無 lookbehind，掃描時檢查前一字元等價實作。 - stalled：reason 分類（issue：no-assignee／assignee-idle／no-commenter／ waiting-outside／parent-tracking；PR：no-reviewer／author-idle／ reviewer-idle／no-commenter）、24h 催促冷卻、父追蹤項把子項活動（留言、state 變更、PR 合併）計入 last_activity、上行引用不採計。 - 資料以 Source 介面注入：邏輯離線可測，CLI 接線待 #5 基礎建設。 - 輸出 JSON 與 gitea.py 位元組相容（鍵序、assignees/author 欄位、 isoformat 時刻、round(x,1) 半偶數舍入）。 - cmd/xcheck：交叉驗證工具（--xrefs 與停滯掃描模式），已對真實 API 與 gitea.py 並行比對，輸出一致。 go build／vet／test 全綠；單元測試覆蓋 xref 邊界與 stalled 判定。
2026-09-10 08:36:31 +08:00
parent 14edef066b
commit a86803d336
3 changed files with 1363 additions and 0 deletions
@@ -0,0 +1,506 @@
+// workflow 套件的單元測試（teai issue #7 驗收：xref 邊界案例與 stalled 判定）。
+//
+// fakeSource 以假資料實作 Source 介面，邏輯離線可測；
+// 語義對照組是 alterminal/agents scripts/lib/gitea.py。
+package workflow
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"testing"
+	"time"
+)
+
+func at(minutes int) time.Time {
+	return time.Date(2026, 9, 10, 8, 0, 0, 0, time.UTC).Add(time.Duration(minutes) * time.Minute)
+}
+
+// fakeSource 是注入假資料的 Source。
+type fakeSource struct {
+	orgs  []string
+	repos map[string][]Repository
+	// issues[owner/repo][number]
+	issues map[string]map[int]Issue
+	// pulls[owner/repo]
+	pulls map[string][]PullRequest
+	// comments[owner/repo/number]
+	comments map[string][]Comment
+}
+
+func (f *fakeSource) MyOrganizations() ([]string, error) { return f.orgs, nil }
+
+func (f *fakeSource) OrganizationRepositories(org string) ([]Repository, error) {
+	return f.repos[org], nil
+}
+
+func (f *fakeSource) OpenIssues(owner, repo string) ([]Issue, error) {
+	var out []Issue
+	for _, i := range f.issues[owner+"/"+repo] {
+		out = append(out, i)
+	}
+	return out, nil
+}
+
+func (f *fakeSource) OpenPulls(owner, repo string) ([]PullRequest, error) {
+	return f.pulls[owner+"/"+repo], nil
+}
+
+func (f *fakeSource) IssueComments(owner, repo string, number int) ([]Comment, error) {
+	return f.comments[fmt.Sprintf("%s/%s/%d", owner, repo, number)], nil
+}
+
+func (f *fakeSource) TryGetIssue(owner, repo string, number int) (Issue, bool, error) {
+	i, ok := f.issues[owner+"/"+repo][number]
+	if !ok {
+		return Issue{}, false, nil
+	}
+	return i, true, nil
+}
+
+func repoWith(name string, hasPR bool) []Repository {
+	h := hasPR
+	return []Repository{{Name: name, HasPullRequests: &h}}
+}
+
+func mustResolve(t *testing.T, org, repo string, texts []string, myOrgs map[string]bool, orgRepos func(string) ([]string, error)) []XrefTarget {
+	t.Helper()
+	targets, err := ResolveXrefTargets(org, repo, texts, myOrgs, orgRepos)
+	if err != nil {
+		t.Fatalf("ResolveXrefTargets: %v", err)
+	}
+	return targets
+}
+
+// TestIterXrefsEdges 驗證 regex 邊界：lookbehind 等價實作與兩段式斜線限制。
+func TestIterXrefsEdges(t *testing.T) {
+	cases := []struct {
+		name string
+		text string
+		want [][2]string
+	}{
+		{"單段 #N", "父項：#3。", [][2]string{{"3"}, {"", "3"}}[1:]},
+		{"單段 repo#N 存在", "見 agents#10", [][2]string{{"agents", "10"}}},
+		{"PR#50 寫法不是 repo", "PR#50 與 issue#49", [][2]string{{"PR", "50"}, {"issue", "49"}}},
+		{"owner/repo#N", "alterminal/agents#32", [][2]string{{"alterminal/agents", "32"}}},
+		{"斜線後不切半段", "alterminal/bear#47 只應匹配整段", [][2]string{{"alterminal/bear", "47"}}},
+		{"連字號 repo 名", "bear-cli#9", [][2]string{{"bear-cli", "9"}}},
+		{"路徑後的 #N 不匹配", "see https://x/a/#frag not #5", [][2]string{{"", "5"}}},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := iterXrefs(tc.text)
+			if len(got) != len(tc.want) {
+				t.Fatalf("iterXrefs(%q) = %v, want %v", tc.text, got, tc.want)
+			}
+			for i := range got {
+				if got[i] != tc.want[i] {
+					t.Fatalf("iterXrefs(%q)[%d] = %v, want %v", tc.text, i, got[i], tc.want[i])
+				}
+			}
+		})
+	}
+}
+
+// TestResolveXrefTargets 驗證三種形態的解析與單段 repo 的存在性邊界（#7 驗收）。
+func TestResolveXrefTargets(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return []string{"agents", "teai", "bear-cli"}, nil }
+	texts := []string{"父項：#3，子項 teai#7，跨倉 alterminal/bear#35，不存在 nope#9，PR#50"}
+
+	got := mustResolve(t, "alterminal", "agents", texts, myOrgs, orgRepos)
+	want := []XrefTarget{
+		{Owner: "alterminal", Repo: "agents", Number: 3},
+		{Owner: "alterminal", Repo: "teai", Number: 7},
+		{Owner: "alterminal", Repo: "bear", Number: 35},
+	}
+	if len(got) != len(want) {
+		t.Fatalf("got %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("got[%d] %v, want %v", i, got[i], want[i])
+		}
+	}
+}
+
+// TestResolveXrefTargetsOwnerNotMyOrg owner/repo#N 的 owner 非所屬組織 → 不解析。
+func TestResolveXrefTargetsOwnerNotMyOrg(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return nil, nil }
+	got := mustResolve(t, "alterminal", "agents", []string{"other/repo#1"}, myOrgs, orgRepos)
+	if len(got) != 0 {
+		t.Fatalf("owner 非所屬組織應略過，got %v", got)
+	}
+}
+
+// TestResolveXrefTargetsDedup 同一目標重複出現只保留第一個。
+func TestResolveXrefTargetsDedup(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return []string{"teai"}, nil }
+	got := mustResolve(t, "alterminal", "agents", []string{"#7 又 teai#7"}, myOrgs, orgRepos)
+	if len(got) != 2 {
+		t.Fatalf("應兩筆（#7 同倉庫、teai#7 跨倉庫），got %v", got)
+	}
+}
+
+// TestScanStalledIssueReasons 驗證 issue 的 reason 分類與排序。
+func TestScanStalledIssueReasons(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs: []string{"alterminal"},
+		repos: map[string][]Repository{
+			"alterminal": repoWith("agents", true),
+		},
+		issues: map[string]map[int]Issue{
+			"alterminal/agents": {
+				1: {Number: 1, Title: "無分派者", State: "open", CreatedAt: at(-600), UpdatedAt: at(-600), Repository: Reference{"alterminal/agents"}, URL: "u1"},
+				2: {Number: 2, Title: "分派者自己最後留言", State: "open", Author: User{"ceo"}, CreatedAt: at(-600), UpdatedAt: at(-300), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/agents"}, URL: "u2"},
+				3: {Number: 3, Title: "無留言", State: "open", CreatedAt: at(-600), UpdatedAt: at(-300), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/agents"}, URL: "u3"},
+				4: {Number: 4, Title: "等外部回應", State: "open", CreatedAt: at(-600), UpdatedAt: at(-300), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/agents"}, URL: "u4"},
+				5: {Number: 5, Title: "太新不在門檻內", State: "open", CreatedAt: at(-30), UpdatedAt: at(-30), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/agents"}, URL: "u5"},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/agents/2": {{User: User{"ceo"}, CreatedAt: at(-300)}},
+			"alterminal/agents/4": {{User: User{"dan"}, CreatedAt: at(-300)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	// 1: no-assignee（10h）、2: assignee-idle（5h）、3: no-commenter（5h）、4: waiting-outside（5h）、5: 不列入
+	if len(got) != 4 {
+		t.Fatalf("應 4 筆，got %d：%v", len(got), got)
+	}
+	byNumber := map[int]Item{}
+	for _, it := range got {
+		byNumber[it.Number] = it
+	}
+	for n, wantReason := range map[int]string{1: "no-assignee", 2: "assignee-idle", 3: "no-commenter", 4: "waiting-outside"} {
+		if byNumber[n].Reason != wantReason {
+			t.Errorf("issue %d reason = %q, want %q", n, byNumber[n].Reason, wantReason)
+		}
+	}
+	if got[0].Number != 1 || got[0].StalledHours != 10 {
+		t.Errorf("排序應由長到短，首筆 issue 1（10h），got %v", got[0])
+	}
+	if byNumber[2].LastCommentBy != "ceo" {
+		t.Errorf("issue 2 last_comment_by 應為 ceo，got %q", byNumber[2].LastCommentBy)
+	}
+}
+
+// TestScanStalledNudgeCooldown 最後留言出自掃描者本人 → 24 小時內冷卻不列入。
+func TestScanStalledNudgeCooldown(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": repoWith("agents", true)},
+		issues: map[string]map[int]Issue{
+			"alterminal/agents": {
+				1: {Number: 1, State: "open", CreatedAt: at(-600), UpdatedAt: at(-600), Assignees: []User{{"max"}}, Repository: Reference{"alterminal/agents"}},
+			},
+		},
+		comments: map[string][]Comment{
+			// admin（掃描者）10 小時前催促過 → 冷卻中，不列入。
+			"alterminal/agents/1": {{User: User{"admin"}, CreatedAt: at(-600)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("催促冷卻中的項目不應列入，got %v", got)
+	}
+	// 冷卻過了（25 小時前催促）→ 重新列入。
+	src.comments["alterminal/agents/1"] = []Comment{{User: User{"admin"}, CreatedAt: at(-1500)}}
+	got, err = ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 1 || got[0].Reason != "waiting-outside" {
+		t.Fatalf("冷卻後應重新列入，got %v", got)
+	}
+}
+
+// TestScanStalledParentTracking 父追蹤項：子項活動計入 last_activity、reason 標記。
+func TestScanStalledParentTracking(t *testing.T) {
+	now := at(0)
+	// 父項與子項都 5 小時沒動：父項 last_activity 計入子項活動後同為 5h，
+	// 應以 parent-tracking 列入並附子項摘要；子項本身則是 assignee-idle。
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int]Issue{
+			"alterminal/teai": {
+				3: {Number: 3, Title: "父", State: "open", Body: "子項：#7", CreatedAt: at(-700), UpdatedAt: at(-300), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/teai"}},
+				7: {Number: 7, Title: "子", State: "open", CreatedAt: at(-650), UpdatedAt: at(-300), Assignees: []User{{"max"}}, Repository: Reference{"alterminal/teai"}},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/teai/7": {{User: User{"max"}, CreatedAt: at(-300)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	var parent3, child7 *Item
+	for i := range got {
+		switch got[i].Number {
+		case 3:
+			parent3 = &got[i]
+		case 7:
+			child7 = &got[i]
+		}
+	}
+	if child7 == nil {
+		t.Fatalf("子項 7 應列入（5h 無活動），got %v", got)
+	}
+	if child7.Reason != "assignee-idle" {
+		t.Errorf("子項 7 reason = %q, want assignee-idle", child7.Reason)
+	}
+	if parent3 == nil {
+		t.Fatalf("父項 3 應列入，got %v", got)
+	}
+	if parent3.Reason != "parent-tracking" {
+		t.Errorf("父項 3 reason = %q, want parent-tracking", parent3.Reason)
+	}
+	if len(parent3.ChildActivity) != 1 || parent3.ChildActivity[0].Number != 7 {
+		t.Errorf("父項 3 應附子項摘要，got %v", parent3.ChildActivity)
+	}
+	if parent3.StalledHours != 5 {
+		t.Errorf("父項 3 stalled_hours = %v, want 5", parent3.StalledHours)
+	}
+
+	// 子項 1 小時前恢復活動 → 父項 last_activity 跟著更新，未達門檻不列入；
+	// 子項本身也不停滯。整份輸出應為空。
+	child := src.issues["alterminal/teai"][7]
+	child.UpdatedAt = at(-60)
+	src.issues["alterminal/teai"][7] = child
+	src.comments["alterminal/teai/7"] = []Comment{{User: User{"max"}, CreatedAt: at(-60)}}
+	got, err = ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("子項推進中 → 父項不應誤報停滯，got %v", got)
+	}
+}
+
+// TestScanStalledParentTrackingNotChild 上行引用：引用對象早於父項 → 非子項，不採計。
+func TestScanStalledParentTrackingNotChild(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int]Issue{
+			"alterminal/teai": {
+				47: {Number: 47, State: "open", Body: "規劃見 #39（更早）", CreatedAt: at(-700), UpdatedAt: at(-600), Assignees: []User{{"ceo"}}, Repository: Reference{"alterminal/teai"}},
+				39: {Number: 39, State: "open", CreatedAt: at(-2000), UpdatedAt: at(-60), Repository: Reference{"alterminal/teai"}},
+			},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	// #39 是上行引用，不採計 → 父項 47 停滯 10h（assignee-idle：ceo 分派、無留言）→ no-commenter。
+	var n47 *Item
+	for i := range got {
+		if got[i].Number == 47 {
+			n47 = &got[i]
+		}
+	}
+	if n47 == nil {
+		t.Fatalf("上行引用不採計 → 47 應停滯列入，got %v", got)
+	}
+	if n47.Reason != "no-commenter" {
+		t.Errorf("47 reason = %q, want no-commenter", n47.Reason)
+	}
+	if len(n47.ChildActivity) != 0 {
+		t.Errorf("上行引用不應產生子項摘要，got %v", n47.ChildActivity)
+	}
+	// #39 本身 updated 1 小時前 → 不列入。
+	for _, it := range got {
+		if it.Number == 39 {
+			t.Errorf("39 未達門檻不應列入：%v", it)
+		}
+	}
+}
+
+// TestScanStalledPullReasons 驗證 PR 的 reason 分類。
+func TestScanStalledPullReasons(t *testing.T) {
+	now := at(0)
+	h := true
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": {{Name: "teai", HasPullRequests: &h}}},
+		pulls: map[string][]PullRequest{
+			"alterminal/teai": {
+				{Number: 10, State: "open", Author: User{"max"}, CreatedAt: at(-600), UpdatedAt: at(-600)},
+				{Number: 11, State: "open", Author: User{"max"}, CreatedAt: at(-600), UpdatedAt: at(-300), RequestedReviewers: []User{{"ceo"}}},
+				{Number: 12, State: "open", Author: User{"max"}, CreatedAt: at(-600), UpdatedAt: at(-300), RequestedReviewers: []User{{"ceo"}}},
+				{Number: 13, State: "open", Author: User{"max"}, CreatedAt: at(-600), UpdatedAt: at(-300), RequestedReviewers: []User{{"ceo"}}},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/teai/11": {{User: User{"max"}, CreatedAt: at(-300)}}, // author-idle
+			"alterminal/teai/12": {{User: User{"ceo"}, CreatedAt: at(-300)}}, // reviewer-idle
+			"alterminal/teai/13": {{User: User{"dan"}, CreatedAt: at(-300)}}, // no-commenter（外部留言）
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	byNumber := map[int]Item{}
+	for _, it := range got {
+		byNumber[it.Number] = it
+	}
+	for n, wantReason := range map[int]string{10: "no-reviewer", 11: "author-idle", 12: "reviewer-idle", 13: "no-commenter"} {
+		item, ok := byNumber[n]
+		if !ok {
+			t.Fatalf("PR %d 應列入，got %v", n, got)
+		}
+		if item.Reason != wantReason {
+			t.Errorf("PR %d reason = %q, want %q", n, item.Reason, wantReason)
+		}
+	}
+	if len(got) != 4 {
+		t.Fatalf("應 4 筆，got %d", len(got))
+	}
+	if byNumber[10].Author != "max" {
+		t.Errorf("PR 10 author 應為 max，got %q", byNumber[10].Author)
+	}
+}
+
+// TestScanStalledNoPullsFlag 停用 PR 的倉庫仍掃 issues，只跳過 PR。
+func TestScanStalledNoPullsFlag(t *testing.T) {
+	now := at(0)
+	h := false
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": {{Name: "docs", HasPullRequests: &h}}},
+		issues: map[string]map[int]Issue{
+			"alterminal/docs": {
+				1: {Number: 1, State: "open", CreatedAt: at(-600), UpdatedAt: at(-600), Repository: Reference{"alterminal/docs"}},
+			},
+		},
+		pulls: map[string][]PullRequest{
+			// 即使假資料有 PR，flag 關閉也不應掃。
+			"alterminal/docs": {{Number: 2, State: "open", Author: User{"max"}, CreatedAt: at(-600), UpdatedAt: at(-600)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 1 || got[0].Number != 1 || got[0].Type != "issue" {
+		t.Fatalf("應只有 issue 1，got %v", got)
+	}
+}
+
+// TestScanStalledSkipsPRsInIssues 確認 /issues 混入的 PR 會被過濾。
+func TestScanStalledSkipsPRsInIssues(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repository{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int]Issue{
+			"alterminal/teai": {
+				1: {Number: 1, State: "open", CreatedAt: at(-600), UpdatedAt: at(-600), Repository: Reference{"alterminal/teai"}, PullRequest: struct{}{}},
+			},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("/issues 混入的 PR 應過濾，got %v", got)
+	}
+}
+
+// TestItemJSON 輸出欄位與 gitea.py 對齊（last_activity_at 序列化、omitempty）。
+func TestItemJSON(t *testing.T) {
+	ts := at(-600)
+	item := Item{
+		Type: "issue", Repo: "alterminal/teai", Number: 7, Title: "t", URL: "u",
+		Assignees: []string{"ceo"}, LastCommentBy: "max",
+		LastActivityAt: ts, StalledHours: 10, Reason: "assignee-idle",
+		ChildActivity: []Child{{Repo: "alterminal/teai", Number: 3, Title: "父", State: "open", LastActivityAt: ts.Format(time.RFC3339)}},
+	}
+	b, err := json.Marshal(item)
+	if err != nil {
+		t.Fatalf("Marshal: %v", err)
+	}
+	var m map[string]any
+	if err := json.Unmarshal(b, &m); err != nil {
+		t.Fatalf("Unmarshal: %v", err)
+	}
+	for _, key := range []string{"type", "repo", "number", "title", "url", "assignees", "last_comment_by", "last_activity_at", "stalled_hours", "reason", "child_activity"} {
+		if _, ok := m[key]; !ok {
+			t.Errorf("輸出缺少欄位 %q：%s", key, b)
+		}
+	}
+	if _, ok := m["author"]; ok {
+		t.Errorf("issue 不應輸出 author：%s", b)
+	}
+}
+
+// TestScanStalledEmpty 無停滯項目 → 空輸出（CLI 層輸出 []）。
+func TestScanStalledEmpty(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{orgs: []string{"alterminal"}, repos: map[string][]Repository{"alterminal": repoWith("teai", true)}}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("應空，got %v", got)
+	}
+}
+
+// TestScanStalledOrgError 組織層錯誤應回傳（不靜默）。
+func TestScanStalledOrgError(t *testing.T) {
+	src := &errSource{}
+	if _, err := ScanStalled(src, "admin", 4.0, at(0)); err == nil {
+		t.Fatal("組織清單失敗應回傳錯誤")
+	}
+}
+
+type errSource struct{}
+
+func (errSource) MyOrganizations() ([]string, error) { return nil, errors.New("boom") }
+func (e errSource) OrganizationRepositories(string) ([]Repository, error) {
+	return nil, errors.New("boom")
+}
+func (e errSource) OpenIssues(string, string) ([]Issue, error)      { return nil, errors.New("boom") }
+func (e errSource) OpenPulls(string, string) ([]PullRequest, error) { return nil, errors.New("boom") }
+func (e errSource) IssueComments(string, string, int) ([]Comment, error) {
+	return nil, errors.New("boom")
+}
+func (e errSource) TryGetIssue(string, string, int) (Issue, bool, error) {
+	return Issue{}, false, errors.New("boom")
+}
+
+// TestRound1 round1 十進位舍入到一位小數（與 Python round(x,1) 半偶數一致）。
+func TestRound1(t *testing.T) {
+	cases := []struct {
+		in   float64
+		want float64
+	}{
+		{10.44, 10.4}, {10.46, 10.5}, {10.0, 10.0},
+		// 半偶數（與 Python round(x,1) 對二進位真值的行為一致）：
+		// 10.45、5.25、5.15 的二進位真值都略低於表值 → 舍到偶數位。
+		{10.45, 10.4}, {0.05, 0.1}, {5.25, 5.2}, {5.15, 5.2},
+	}
+	for _, tc := range cases {
+		if got := round1(tc.in); got != tc.want {
+			t.Errorf("round1(%v) = %v, want %v", tc.in, got, tc.want)
+		}
+	}
+}