add unit test

test/xmppjs/test_HistoryManager.ts

@@ -0,0 +1,49 @@
+import { expect } from "chai";
+import { MemoryStorage, HistoryManager } from "../../src/xmppjs/HistoryManager";
+import { Element } from "@xmpp/xml";
+import { JID } from "@xmpp/jid";
+
+describe("HistoryManager", () => {
+    describe("MemoryStorage", () => {
+        it("should return filtered history", async () => {
+            const historyManager = new HistoryManager(new MemoryStorage(20));
+            historyManager.addMessage(
+                "[email protected]", new Element("stanza1"),
+                new JID("room1", "example.org", "user1"),
+            );
+            historyManager.addMessage(
+                "[email protected]", new Element("stanza2"),
+                new JID("room1", "example.org", "user1"),
+            );
+            historyManager.addMessage(
+                "[email protected]", new Element("stanza3"),
+                new JID("room1", "example.org", "user1"),
+            );
+            historyManager.addMessage(
+                "[email protected]", new Element("stanza1"),
+                new JID("room1", "example.org", "user1"),
+            );
+
+            const unfilteredRoom1 = await historyManager.getHistory("[email protected]", {});
+            expect(unfilteredRoom1.length).to.equal(3);
+            const unfilteredRoom2 = await historyManager.getHistory("[email protected]", {});
+            expect(unfilteredRoom2.length).to.equal(1);
+
+            const maxStanzasRoom1 = await historyManager.getHistory("[email protected]", {
+                maxstanzas: 2,
+            });
+            expect(maxStanzasRoom1.length).to.equal(2);
+            const maxStanzasRoom2 = await historyManager.getHistory("[email protected]", {
+                maxstanzas: 2,
+            });
+            expect(maxStanzasRoom2.length).to.equal(1);
+
+            // each stanza will be about 40 characters, so maxchars 50 should
+            // only give us one stanza
+            const maxCharsRoom1 = await historyManager.getHistory("[email protected]", {
+                maxchars: 50,
+            });
+            expect(maxCharsRoom1.length).to.equal(1);
+        });
+    });
+});