json-to-table-format/test/test.ts

A module for converting JSON data into a tabular format.

import { getData, getStartPoints, getRows } from "../src/lib";

// Example 1: Basic Usage with Simple Style
console.log("=== Example 1: Basic Usage with Simple Style ===");
const basicData = [
  { name: "John", age: 30, city: "New York" },
  { name: "Alice", age: 25, city: "London" },
  { name: "Bob", age: 35, city: "Paris" },
];

const headers = ["name", "age", "city"];
const data = getData(basicData);
const startPoints = getStartPoints(data, headers);
const rows = getRows(data, headers, startPoints);
console.log(rows.join("\n"));

// Example 2: ASCII Style Table
console.log("\n=== Example 2: ASCII Style Table ===");
const asciiRows = getRows(data, headers, startPoints, "ascii");
console.log(asciiRows.join("\n"));

// Example 3: Complex Data with ASCII Style
console.log("\n=== Example 3: Complex Data with ASCII Style ===");
const complexData = [
  {
    name: "John Smith",
    age: 30,
    active: true,
    address: {
      street: "123 Main St",
      city: "New York",
      country: "USA",
      coordinates: {
        lat: 40.7128,
        lng: -74.006,
      },
    },
    hobbies: [
      { activity: "reading", level: "advanced" },
      { activity: "gaming", level: "intermediate", platforms: ["PC", "PS5"] },
      { activity: "coding", level: "expert" },
    ],
    lastLogin: "2025-05-28T10:00:00Z",
    score: 85.5,
    metadata: {
      source: "internal",
      tags: ["employee", "senior"],
    },
    projects: ["Project Alpha", "Project Beta"],
    isVerified: true,
    lastUpdated: "2025-05-28T12:00:00Z",
  },
  {
    name: "Alice Johnson",
    age: 25,
    active: false,
    address: {
      street: "456 Park Ave",
      city: "London",
      country: "UK",
      coordinates: {
        lat: 51.5074,
        lng: -0.1278,
      },
    },
    hobbies: [
      { activity: "painting", level: "beginner" },
      { activity: "dancing", level: "professional" },
    ],
    lastLogin: null,
    score: 92.0,
    metadata: {
      source: "external",
      tags: ["contractor"],
    },
    projects: ["Project Gamma"],
    isVerified: false,
    lastUpdated: null,
  },
  {
    name: "Bob",
    age: undefined,
    active: true,
    address: {
      street: null,
      city: "Tokyo",
      country: "Japan",
      coordinates: null,
    },
    hobbies: [],
    lastLogin: "2025-05-29T08:30:00Z",
    score: null,
    metadata: {
      source: "internal",
      tags: [],
    },
    projects: [],
    isVerified: true,
    lastUpdated: "2025-05-29T09:00:00Z",
  },
];

// Get all columns from the first object
const complexDataProcessed = getData(complexData);
const complexHeaders = Object.keys(complexDataProcessed[0]);
const complexStartPoints = getStartPoints(complexDataProcessed, complexHeaders);
const complexRows = getRows(
  complexDataProcessed,
  complexHeaders,
  complexStartPoints,
  "ascii"
);
console.log(complexRows.join("\n"));

// Example 4: Varying Name Lengths
console.log("\n=== Example 4: Varying Name Lengths ===");
const varyingData = [
  { name: "John", age: 30, city: "New York" },
  { name: "Alice", age: 25, city: "London" },
  { name: "Christopher", age: 35, city: "Paris" },
  { name: "Bob", age: 28, city: "Tokyo" },
];

const varyingDataProcessed = getData(varyingData);
const varyingStartPoints = getStartPoints(varyingDataProcessed, headers);
const varyingRows = getRows(
  varyingDataProcessed,
  headers,
  varyingStartPoints,
  "ascii"
);
console.log(varyingRows.join("\n"));