Carlos Florêncio
77 lines
2.4 KiB
TypeScript
77 lines
2.4 KiB
TypeScript
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
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import { createDebugLogger } from "./log";
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describe("createDebugLogger", () => {
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beforeEach(() => {
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vi.spyOn(console, "debug").mockImplementation(() => {});
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});
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afterEach(() => {
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vi.restoreAllMocks();
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});
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it("returns a function", () => {
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expect(typeof createDebugLogger("test")).toBe("function");
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});
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it("prefixes output with [namespace]", () => {
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const log = createDebugLogger("my-ns");
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log("hello");
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expect(console.debug).toHaveBeenCalledWith("[my-ns] hello");
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});
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it("logs plain strings as-is", () => {
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const log = createDebugLogger("ns");
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log("simple message");
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expect(console.debug).toHaveBeenCalledWith("[ns] simple message");
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});
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it("flattens plain objects to key=value pairs", () => {
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const log = createDebugLogger("ns");
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log("msg", { a: 1, b: "hello world" });
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expect(console.debug).toHaveBeenCalledWith('[ns] msg a=1 b="hello world"');
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});
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it("quotes values containing spaces", () => {
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const log = createDebugLogger("ns");
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log({ key: "value with space" });
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expect(console.debug).toHaveBeenCalledWith('[ns] key="value with space"');
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});
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it("leaves bare values unquoted", () => {
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const log = createDebugLogger("ns");
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log({ key: "simple_value" });
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expect(console.debug).toHaveBeenCalledWith("[ns] key=simple_value");
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});
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it("formats null and undefined", () => {
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const log = createDebugLogger("ns");
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log({ a: null, b: undefined });
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expect(console.debug).toHaveBeenCalledWith("[ns] a=null b=undefined");
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});
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it("formats numbers and booleans", () => {
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const log = createDebugLogger("ns");
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log({ count: 42, flag: true });
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expect(console.debug).toHaveBeenCalledWith("[ns] count=42 flag=true");
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});
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it("formats Error objects with name and message", () => {
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const log = createDebugLogger("ns");
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log({ err: new Error("boom") });
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expect(console.debug).toHaveBeenCalledWith('[ns] err={"name":"Error","message":"boom"}');
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});
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it("serializes nested objects as JSON", () => {
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const log = createDebugLogger("ns");
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log({ nested: { x: 1 } });
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expect(console.debug).toHaveBeenCalledWith('[ns] nested={"x":1}');
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});
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it("mixes strings and objects in a single call", () => {
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const log = createDebugLogger("ns");
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log("prefix", { a: 1 }, "suffix");
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expect(console.debug).toHaveBeenCalledWith("[ns] prefix a=1 suffix");
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});
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});
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