initial commit

tests/integration/message_fetch_pagination_no_duplicates_test.go

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+)
+
+func TestMessageFetchPaginationNoDuplicates(t *testing.T) {
+	client := newTestClient(t)
+	account := createTestAccount(t, client)
+
+	guild := createGuild(t, client, account.Token, "Pagination No Duplicates Test Guild")
+	channelID := parseSnowflake(t, guild.SystemChannel)
+
+	clearChannelMessages(t, client, channelID, account.Token)
+
+	// Seed 100 messages
+	const totalMessages = 100
+	seedResult := seedMessagesWithContent(t, client, channelID, totalMessages, account.UserID)
+
+	if len(seedResult.Messages) != totalMessages {
+		t.Fatalf("expected %d messages to be seeded, got %d", totalMessages, len(seedResult.Messages))
+	}
+
+	// Paginate through all messages with limit=25
+	const limit = 25
+	allMessageIDs := make(map[string]bool)
+	var lastMessageID string
+	pageCount := 0
+
+	for {
+		var url string
+		if lastMessageID == "" {
+			url = fmt.Sprintf("/channels/%d/messages?limit=%d", channelID, limit)
+		} else {
+			url = fmt.Sprintf("/channels/%d/messages?limit=%d&before=%s", channelID, limit, lastMessageID)
+		}
+
+		resp, err := client.getWithAuth(url, account.Token)
+		if err != nil {
+			t.Fatalf("failed to fetch messages on page %d: %v", pageCount+1, err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var fetchedMessages []struct {
+			ID        string `json:"id"`
+			ChannelID string `json:"channel_id"`
+			Content   string `json:"content"`
+		}
+		decodeJSONResponse(t, resp, &fetchedMessages)
+
+		if len(fetchedMessages) == 0 {
+			break
+		}
+
+		pageCount++
+
+		t.Logf("Page %d: fetched %d messages", pageCount, len(fetchedMessages))
+
+		for i, msg := range fetchedMessages {
+			if allMessageIDs[msg.ID] {
+				t.Fatalf("duplicate message ID %s found on page %d at index %d", msg.ID, pageCount, i)
+			}
+			allMessageIDs[msg.ID] = true
+		}
+
+		for i := 0; i < len(fetchedMessages)-1; i++ {
+			current := parseSnowflake(t, fetchedMessages[i].ID)
+			next := parseSnowflake(t, fetchedMessages[i+1].ID)
+			if current <= next {
+				t.Fatalf("page %d: messages not in descending order: message[%d] (%d) <= message[%d] (%d)", pageCount, i, current, i+1, next)
+			}
+		}
+
+		lastMessageID = fetchedMessages[len(fetchedMessages)-1].ID
+
+		if pageCount > 10 {
+			t.Fatalf("pagination exceeded expected number of pages (expected ~4 pages for 100 messages with limit 25)")
+		}
+
+		if len(fetchedMessages) < limit {
+			break
+		}
+	}
+
+	if len(allMessageIDs) != totalMessages {
+		t.Fatalf("expected to collect %d unique messages, got %d", totalMessages, len(allMessageIDs))
+	}
+
+	for _, seededMsg := range seedResult.Messages {
+		if !allMessageIDs[seededMsg.MessageID] {
+			t.Fatalf("seeded message ID %s was not retrieved during pagination", seededMsg.MessageID)
+		}
+	}
+
+	expectedPages := 4
+	if pageCount != expectedPages {
+		t.Fatalf("expected %d pages, got %d", expectedPages, pageCount)
+	}
+
+	t.Logf("Pagination test passed: retrieved %d unique messages across %d pages with no duplicates", len(allMessageIDs), pageCount)
+}