Add simple initial tests

# Editor directories and files

.idea

.vscode

.vscode/*

!.vscode/extensions.json

*.suo

*.ntvs*

*.njsproj

{

  "recommendations": [

    "zixuanchen.vitest-explorer",

    "vue.volar"

  ]

}

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module.exports = {

  verbose: true,

  bail: true,

  collectCoverage: true,

  coverageDirectory: "coverage",

  restoreMocks: true,

  moduleFileExtensions: ["js", "jsx", "json", "vue"],

  setupFiles: ["<rootDir>/tests/setup.js"],

  transform: {

    "^.+\\.vue$": "vue-jest",

    ".+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$":

      "jest-transform-stub",

    "^.+\\.jsx?$": "babel-jest",

  },

  moduleNameMapper: {

    "^@/tests/(.*)$": "<rootDir>/tests/$1",

    "^@/(.*)$": "<rootDir>/src/$1",

  },

  snapshotSerializers: ["jest-serializer-vue"],

  testMatch: [

    "**/tests/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx)",

  ],

  testURL: "http://localhost/",

};

{

  "compilerOptions": {

    "baseUrl": ".",

    "target": "es6",

    "paths": {

      "@src/*": ["./src/*"]

    }

  }

}

import { describe, it, expect } from "vitest";

import { capitalizeFirstLetter } from "@src/utils";

describe("capitalizeFirstLetter", () => {

  it("returns empty string given empty string", () => {

    const result = capitalizeFirstLetter("");

    expect(result).to.be.empty;

  });

  it("capitalizes the first letter of a string starting with a letter, and changes nothing else", () => {

    const result = capitalizeFirstLetter("this IS a String!");

    expect(result).to.equal("This IS a String!");

  });

  it("returns a string unchanged when not starting with a letter", () => {

    const result = capitalizeFirstLetter("42 is the answer");

    expect(result).to.equal("42 is the answer");

  });

});