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import { removeDefaultProperty } from "./llmExtract";
import { trimToTokenLimit } from "./llmExtract";
import { encoding_for_model } from "@dqbd/tiktoken";
jest.mock("@dqbd/tiktoken", () => ({
encoding_for_model: jest.fn(),
}));
describe("removeDefaultProperty", () => {
it("should remove the default property from a simple object", () => {
const input = { default: "test", test: "test" };
const expectedOutput = { test: "test" };
expect(removeDefaultProperty(input)).toEqual(expectedOutput);
});
it("should remove the default property from a nested object", () => {
const input = {
default: "test",
nested: { default: "nestedTest", test: "nestedTest" },
};
const expectedOutput = { nested: { test: "nestedTest" } };
expect(removeDefaultProperty(input)).toEqual(expectedOutput);
});
it("should remove the default property from an array of objects", () => {
const input = {
array: [
{ default: "test1", test: "test1" },
{ default: "test2", test: "test2" },
],
};
const expectedOutput = { array: [{ test: "test1" }, { test: "test2" }] };
expect(removeDefaultProperty(input)).toEqual(expectedOutput);
});
it("should handle objects without a default property", () => {
const input = { test: "test" };
const expectedOutput = { test: "test" };
expect(removeDefaultProperty(input)).toEqual(expectedOutput);
});
it("should handle null and non-object inputs", () => {
expect(removeDefaultProperty(null)).toBeNull();
expect(removeDefaultProperty("string")).toBe("string");
expect(removeDefaultProperty(123)).toBe(123);
});
});
describe("trimToTokenLimit", () => {
const mockEncode = jest.fn();
const mockFree = jest.fn();
const mockEncoder = {
encode: mockEncode,
free: mockFree,
};
beforeEach(() => {
jest.clearAllMocks();
(encoding_for_model as jest.Mock).mockReturnValue(mockEncoder);
});
it("should return original text if within token limit", () => {
const text = "This is a test text";
mockEncode.mockReturnValue(new Array(5)); // Simulate 5 tokens
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result).toEqual({
text,
numTokens: 5,
warning: undefined
});
expect(mockEncode).toHaveBeenCalledWith(text);
expect(mockFree).toHaveBeenCalled();
});
it("should trim text and return warning when exceeding token limit", () => {
const text = "This is a longer text that needs to be trimmed";
mockEncode
.mockReturnValueOnce(new Array(20)) // First call for full text
.mockReturnValueOnce(new Array(8)); // Second call for trimmed text
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(8);
expect(result.warning).toContain("automatically trimmed");
expect(mockEncode).toHaveBeenCalledTimes(2);
expect(mockFree).toHaveBeenCalled();
});
it("should append previous warning if provided", () => {
const text = "This is a test text that is too long";
const previousWarning = "Previous warning message";
mockEncode
.mockReturnValueOnce(new Array(15))
.mockReturnValueOnce(new Array(8));
const result = trimToTokenLimit(text, 10, "gpt-4o", previousWarning);
expect(result.warning).toContain("automatically trimmed");
expect(result.warning).toContain(previousWarning);
});
it("should use fallback approach when encoder throws error", () => {
const text = "This is some text to test fallback";
mockEncode.mockImplementation(() => {
throw new Error("Encoder error");
});
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text.length).toBeLessThanOrEqual(30); // 10 tokens * 3 chars per token
expect(result.numTokens).toBe(10);
expect(result.warning).toContain("Failed to derive number of LLM tokens");
});
it("should handle empty text", () => {
const text = "";
mockEncode.mockReturnValue([]);
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result).toEqual({
text: "",
numTokens: 0,
warning: undefined
});
expect(mockFree).toHaveBeenCalled();
});
it("should handle large token limits (128k)", () => {
const text = "A".repeat(384000); // Assuming ~3 chars per token, this would be ~128k tokens
mockEncode
.mockReturnValueOnce(new Array(130000)) // First check shows it's too long
.mockReturnValueOnce(new Array(127000)); // Second check shows it's within limit after trim
const result = trimToTokenLimit(text, 128000, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(127000);
expect(result.warning).toContain("automatically trimmed");
expect(mockEncode).toHaveBeenCalledTimes(2);
expect(mockFree).toHaveBeenCalled();
});
it("should handle large token limits (512k) with 32k context window", () => {
const text = "A".repeat(1536000); // Assuming ~3 chars per token, this would be ~512k tokens
mockEncode
.mockReturnValueOnce(new Array(520000)) // First check shows it's too long
.mockReturnValueOnce(new Array(32000)); // Second check shows it's within context limit after trim
const result = trimToTokenLimit(text, 32000, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(32000);
expect(result.warning).toContain("automatically trimmed");
expect(mockEncode).toHaveBeenCalledTimes(2);
expect(mockFree).toHaveBeenCalled();
});
it("should preserve text when under token limit", () => {
const text = "Short text";
mockEncode.mockReturnValue(new Array(5)); // 5 tokens
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text).toBe(text);
expect(result.numTokens).toBe(5);
expect(result.warning).toBeUndefined();
expect(mockFree).toHaveBeenCalled();
});
it("should append new warning to previous warning", () => {
const text = "A".repeat(300);
const previousWarning = "Previous warning message";
mockEncode
.mockReturnValueOnce(new Array(100))
.mockReturnValueOnce(new Array(50));
const result = trimToTokenLimit(text, 50, "gpt-4o", previousWarning);
expect(result.warning).toContain("automatically trimmed");
expect(result.warning).toContain(previousWarning);
expect(mockFree).toHaveBeenCalled();
});
it("should handle encoder initialization failure gracefully", () => {
const text = "Sample text";
(encoding_for_model as jest.Mock).mockImplementationOnce(() => {
throw new Error("Encoder initialization failed");
});
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text.length).toBeLessThanOrEqual(30); // 10 tokens * 3 chars
expect(result.warning).toContain("Failed to derive number of LLM tokens");
expect(mockFree).not.toHaveBeenCalled();
});
it("should handle encoding errors during trimming", () => {
const text = "Sample text";
mockEncode.mockImplementation(() => {
throw new Error("Encoding failed");
});
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text.length).toBeLessThanOrEqual(30);
expect(result.warning).toContain("Failed to derive number of LLM tokens");
expect(mockFree).toHaveBeenCalled();
});
it("should handle very small token limits", () => {
const text = "This is a test sentence that should be trimmed significantly";
mockEncode
.mockReturnValueOnce(new Array(20))
.mockReturnValueOnce(new Array(3));
const result = trimToTokenLimit(text, 3, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(3);
expect(result.warning).toContain("automatically trimmed");
expect(mockFree).toHaveBeenCalled();
});
it("should handle unicode characters", () => {
const text = "Hello 👋 World 🌍";
mockEncode
.mockReturnValueOnce(new Array(8))
.mockReturnValueOnce(new Array(4));
const result = trimToTokenLimit(text, 4, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(4);
expect(result.warning).toContain("automatically trimmed");
expect(mockFree).toHaveBeenCalled();
});
it("should handle multiple trimming iterations", () => {
const text = "A".repeat(1000);
mockEncode
.mockReturnValueOnce(new Array(300))
.mockReturnValueOnce(new Array(200))
.mockReturnValueOnce(new Array(100))
.mockReturnValueOnce(new Array(50));
const result = trimToTokenLimit(text, 50, "gpt-4o");
expect(result.text.length).toBeLessThan(text.length);
expect(result.numTokens).toBe(50);
expect(result.warning).toContain("automatically trimmed");
expect(mockEncode).toHaveBeenCalledTimes(4);
expect(mockFree).toHaveBeenCalled();
});
it("should handle exact token limit match", () => {
const text = "Exact token limit text";
mockEncode.mockReturnValue(new Array(10));
const result = trimToTokenLimit(text, 10, "gpt-4o");
expect(result.text).toBe(text);
expect(result.numTokens).toBe(10);
expect(result.warning).toBeUndefined();
expect(mockFree).toHaveBeenCalled();
});
});
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