1package main
  2
  3import (
  4	"context"
  5	"net/http"
  6	"net/http/httptest"
  7	"strings"
  8	"testing"
  9	"time"
 10)
 11
 12type fakeSource struct {
 13	start time.Time
 14	end   time.Time
 15	items []Item
 16	err   error
 17}
 18
 19func (f *fakeSource) AddedBetween(_ context.Context, start, end time.Time) ([]Item, error) {
 20	f.start, f.end = start, end
 21	return f.items, f.err
 22}
 23
 24func testApp(source *fakeSource) *app {
 25	return &app{
 26		jellyfin: source,
 27		location: time.UTC,
 28		labels:   DefaultLabels(),
 29		now: func() time.Time {
 30			return time.Date(2026, 9, 2, 12, 0, 0, 0, time.UTC)
 31		},
 32	}
 33}
 34
 35func TestCurrentWeek(t *testing.T) {
 36	source := &fakeSource{}
 37	request := httptest.NewRequest(http.MethodGet, "/api/current-week", nil)
 38	response := httptest.NewRecorder()
 39	testApp(source).routes().ServeHTTP(response, request)
 40
 41	if response.Code != http.StatusOK {
 42		t.Fatalf("status = %d, body = %q", response.Code, response.Body.String())
 43	}
 44	if got := response.Body.String(); !strings.HasPrefix(got, "2026-08-31 - 2026-09-02 jellyfin weekly update:") {
 45		t.Fatalf("body = %q", got)
 46	}
 47	wantStart := time.Date(2026, 8, 31, 0, 0, 0, 0, time.UTC)
 48	if !source.start.Equal(wantStart) || !source.end.Equal(testApp(source).now()) {
 49		t.Fatalf("range = %v to %v", source.start, source.end)
 50	}
 51}
 52
 53func TestStartOfWeekUsesMondayMidnight(t *testing.T) {
 54	location := time.FixedZone("test", 2*60*60)
 55	now := time.Date(2026, 9, 6, 23, 45, 0, 0, location) // Sunday
 56	want := time.Date(2026, 8, 31, 0, 0, 0, 0, location)
 57	if got := startOfWeek(now); !got.Equal(want) {
 58		t.Fatalf("startOfWeek() = %v, want %v", got, want)
 59	}
 60}
 61
 62func TestSelectedWeek(t *testing.T) {
 63	source := &fakeSource{}
 64	request := httptest.NewRequest(http.MethodGet, "/api/week?offset=-2", nil)
 65	response := httptest.NewRecorder()
 66	testApp(source).routes().ServeHTTP(response, request)
 67
 68	if response.Code != http.StatusOK {
 69		t.Fatalf("status = %d, body = %q", response.Code, response.Body.String())
 70	}
 71	if got := response.Body.String(); !strings.HasPrefix(got, "2026-08-17 - 2026-08-24 jellyfin weekly update:") {
 72		t.Fatalf("body = %q", got)
 73	}
 74}
 75
 76func TestSelectedWeekRejectsInvalidOffset(t *testing.T) {
 77	request := httptest.NewRequest(http.MethodGet, "/api/week?offset=0", nil)
 78	response := httptest.NewRecorder()
 79	testApp(&fakeSource{}).routes().ServeHTTP(response, request)
 80	if response.Code != http.StatusBadRequest {
 81		t.Fatalf("status = %d", response.Code)
 82	}
 83}
 84
 85func TestSelectedMonth(t *testing.T) {
 86	source := &fakeSource{}
 87	request := httptest.NewRequest(http.MethodGet, "/api/month?offset=-2", nil)
 88	response := httptest.NewRecorder()
 89	testApp(source).routes().ServeHTTP(response, request)
 90
 91	if response.Code != http.StatusOK {
 92		t.Fatalf("status = %d, body = %q", response.Code, response.Body.String())
 93	}
 94	if got := response.Body.String(); !strings.HasPrefix(got, "2026-07 jellyfin monthly update:") {
 95		t.Fatalf("body = %q", got)
 96	}
 97	if source.start.Month() != time.July || source.end.Month() != time.August {
 98		t.Fatalf("range = %v to %v", source.start, source.end)
 99	}
100}
101
102func TestSelectedMonthRejectsInvalidOffset(t *testing.T) {
103	request := httptest.NewRequest(http.MethodGet, "/api/month?offset=0", nil)
104	response := httptest.NewRecorder()
105	testApp(&fakeSource{}).routes().ServeHTTP(response, request)
106	if response.Code != http.StatusBadRequest {
107		t.Fatalf("status = %d", response.Code)
108	}
109}
110
111func TestIndex(t *testing.T) {
112	request := httptest.NewRequest(http.MethodGet, "/", nil)
113	response := httptest.NewRecorder()
114	testApp(&fakeSource{}).routes().ServeHTTP(response, request)
115	if response.Code != http.StatusOK || !strings.Contains(response.Body.String(), "Jellyfin updates") {
116		t.Fatalf("status = %d, body = %q", response.Code, response.Body.String())
117	}
118}