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import { type LabelEntry, SessionManager } from "../../src/core/session-manager.ts";
describe("SessionManager labels", () => {
it("sets and gets labels", () => {
const session = SessionManager.inMemory();
const msgId = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
// No label initially
expect(session.getLabel(msgId)).toBeUndefined();
// Set a label
const labelId = session.appendLabelChange(msgId, "checkpoint");
expect(session.getLabel(msgId)).toBe("checkpoint");
// Label entry should be in entries
const entries = session.getEntries();
const labelEntry = entries.find((e) => e.type === "label") as LabelEntry;
expect(labelEntry).toBeDefined();
expect(labelEntry.id).toBe(labelId);
expect(labelEntry.targetId).toBe(msgId);
expect(labelEntry.label).toBe("checkpoint");
});
it("clears labels with undefined", () => {
const session = SessionManager.inMemory();
const msgId = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
session.appendLabelChange(msgId, "checkpoint");
expect(session.getLabel(msgId)).toBe("checkpoint");
// Clear the label
session.appendLabelChange(msgId, undefined);
expect(session.getLabel(msgId)).toBeUndefined();
});
it("last label wins", () => {
const session = SessionManager.inMemory();
const msgId = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
session.appendLabelChange(msgId, "first");
session.appendLabelChange(msgId, "second");
const lastLabelId = session.appendLabelChange(msgId, "third");
expect(session.getLabel(msgId)).toBe("third");
const entries = session.getEntries();
const lastLabelEntry = entries.find((e) => e.id === lastLabelId) as LabelEntry;
const tree = session.getTree();
const msgNode = tree.find((n) => n.entry.id === msgId);
expect(msgNode?.labelTimestamp).toBe(lastLabelEntry.timestamp);
});
it("labels are included in tree nodes", () => {
const session = SessionManager.inMemory();
const msg1Id = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
const msg2Id = session.appendMessage({
role: "assistant",
content: [{ type: "text", text: "hi" }],
api: "anthropic-messages",
provider: "anthropic",
model: "test",
usage: {
input: 1,
output: 1,
cacheRead: 0,
cacheWrite: 0,
totalTokens: 2,
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
},
stopReason: "stop",
timestamp: 2,
});
const msg1LabelId = session.appendLabelChange(msg1Id, "start");
const msg2LabelId = session.appendLabelChange(msg2Id, "response");
const entries = session.getEntries();
const msg1LabelEntry = entries.find((e) => e.id === msg1LabelId) as LabelEntry;
const msg2LabelEntry = entries.find((e) => e.id === msg2LabelId) as LabelEntry;
const tree = session.getTree();
// Find the message nodes (skip label entries)
const msg1Node = tree.find((n) => n.entry.id === msg1Id);
expect(msg1Node?.label).toBe("start");
expect(msg1Node?.labelTimestamp).toBe(msg1LabelEntry.timestamp);
// msg2 is a child of msg1
const msg2Node = msg1Node?.children.find((n) => n.entry.id === msg2Id);
expect(msg2Node?.label).toBe("response");
expect(msg2Node?.labelTimestamp).toBe(msg2LabelEntry.timestamp);
});
it("labels are preserved in createBranchedSession", () => {
const session = SessionManager.inMemory();
const msg1Id = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
const msg2Id = session.appendMessage({
role: "assistant",
content: [{ type: "text", text: "hi" }],
api: "anthropic-messages",
provider: "anthropic",
model: "test",
usage: {
input: 1,
output: 1,
cacheRead: 0,
cacheWrite: 0,
totalTokens: 2,
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
},
stopReason: "stop",
timestamp: 2,
});
const msg1LabelId = session.appendLabelChange(msg1Id, "important");
const msg2LabelId = session.appendLabelChange(msg2Id, "also-important");
const originalEntries = session.getEntries();
const msg1LabelEntry = originalEntries.find((e) => e.id === msg1LabelId) as LabelEntry;
const msg2LabelEntry = originalEntries.find((e) => e.id === msg2LabelId) as LabelEntry;
// Branch from msg2 (in-memory mode returns null, but updates internal state)
session.createBranchedSession(msg2Id);
// Labels should be preserved
expect(session.getLabel(msg1Id)).toBe("important");
expect(session.getLabel(msg2Id)).toBe("also-important");
// New label entries should exist
const entries = session.getEntries();
const labelEntries = entries.filter((e) => e.type === "label") as LabelEntry[];
expect(labelEntries).toHaveLength(2);
const tree = session.getTree();
const msg1Node = tree.find((n) => n.entry.id === msg1Id);
const msg2Node = msg1Node?.children.find((n) => n.entry.id === msg2Id);
expect(msg1Node?.labelTimestamp).toBe(msg1LabelEntry.timestamp);
expect(msg2Node?.labelTimestamp).toBe(msg2LabelEntry.timestamp);
});
it("rewires children of removed labels when forking", () => {
const session = SessionManager.inMemory();
const msg1Id = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
session.appendLabelChange(msg1Id, "checkpoint");
const modelChangeId = session.appendModelChange("anthropic", "claude-test");
const msg2Id = session.appendMessage({ role: "user", content: "followup", timestamp: 2 });
session.createBranchedSession(msg2Id);
expect(session.getEntry(modelChangeId)?.parentId).toBe(msg1Id);
});
it("labels not on path are not preserved in createBranchedSession", () => {
const session = SessionManager.inMemory();
const msg1Id = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
const msg2Id = session.appendMessage({
role: "assistant",
content: [{ type: "text", text: "hi" }],
api: "anthropic-messages",
provider: "anthropic",
model: "test",
usage: {
input: 1,
output: 1,
cacheRead: 0,
cacheWrite: 0,
totalTokens: 2,
cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
},
stopReason: "stop",
timestamp: 2,
});
const msg3Id = session.appendMessage({ role: "user", content: "followup", timestamp: 3 });
// Label all messages
session.appendLabelChange(msg1Id, "first");
session.appendLabelChange(msg2Id, "second");
session.appendLabelChange(msg3Id, "third");
// Branch from msg2 (excludes msg3)
session.createBranchedSession(msg2Id);
// Only labels for msg1 and msg2 should be preserved
expect(session.getLabel(msg1Id)).toBe("first");
expect(session.getLabel(msg2Id)).toBe("second");
expect(session.getLabel(msg3Id)).toBeUndefined();
});
it("labels are not included in buildSessionContext", () => {
const session = SessionManager.inMemory();
const msgId = session.appendMessage({ role: "user", content: "hello", timestamp: 1 });
session.appendLabelChange(msgId, "checkpoint");
const ctx = session.buildSessionContext();
expect(ctx.messages).toHaveLength(1);
expect(ctx.messages[0].role).toBe("user");
});
it("throws when labeling non-existent entry", () => {
const session = SessionManager.inMemory();
expect(() => session.appendLabelChange("non-existent", "label")).toThrow("Entry non-existent not found");
});
});
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