Adding tests

.eslintrc.js

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+module.exports = {
+    root: true,
+    env: {
+      node: true
+    },
+    extends: ['plugin:vue/essential', '@vue/prettier', '@vue/typescript'],
+    rules: {
+      'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
+      'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
+      singleQuote: true
+    },
+    parserOptions: {
+      parser: '@typescript-eslint/parser'
+    }
+  };

.prettierrc.js

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+module.exports = {
+  singleQuote: true
+};

__mocks__/styleMock.js

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+module.exports = {};

__tests__/swal.spec.ts

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+import 'jest';
+import { mount, createLocalVue } from '@vue/test-utils';
+
+import VueSweetalert2 from '../src';
+import { CreateElement } from 'vue';
+
+const factory = () => {
+    const localVue = createLocalVue();
+    localVue.use(VueSweetalert2);
+    return localVue;
+};
+
+const factoryComponent = () => {
+    const localVue = createLocalVue();
+    localVue.use(VueSweetalert2);
+    return mount(
+        {
+            render(h: CreateElement) {
+                return h('div');
+            }
+        },
+        { localVue }
+    );
+};
+
+describe('Vue-SweetAlert2', () => {
+    it('should exists', () => {
+        const Vue = factory();
+        expect(typeof VueSweetalert2).toBe('function');
+    });
+
+    it('should exists', () => {
+        const Vue = factory();
+        expect(typeof Vue.swal).toBe('function');
+    });
+
+    it('should has promise', () => {
+        const Vue = factory();
+        const pr = Vue.swal('Test');
+        expect(pr.then).toBeTruthy();
+    });
+});
+
+describe('Vue-SweetAlert2 vm', () => {
+    it('should vm', () => {
+        const wrapper = factoryComponent();
+
+        expect(typeof wrapper.vm.$swal).toBe('function');
+    });
+
+    it('should vm has', () => {
+        const wrapper = factoryComponent();
+        const pr = wrapper.vm.$swal('Test');
+        expect(pr.then).toBeTruthy();
+    });
+});

babel.config.js

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+module.exports = {
+  presets: ['@vue/app']
+};

jest.config.js

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+// For a detailed explanation regarding each configuration property, visit:
+// https://jestjs.io/docs/en/configuration.html
+
+module.exports = {
+    // All imported modules in your tests should be mocked automatically
+    // automock: false,
+
+    // Stop running tests after the first failure
+    // bail: false,
+
+    // Respect "browser" field in package.json when resolving modules
+    // browser: false,
+
+    // The directory where Jest should store its cached dependency information
+    // cacheDirectory: "/tmp/jest_rs",
+
+    // Automatically clear mock calls and instances between every test
+    // clearMocks: false,
+
+    // Indicates whether the coverage information should be collected while executing the test
+    // collectCoverage: false,
+
+    // An array of glob patterns indicating a set of files for which coverage information should be collected
+    // collectCoverageFrom: null,
+
+    // The directory where Jest should output its coverage files
+    // coverageDirectory: null,
+
+    // An array of regexp pattern strings used to skip coverage collection
+    coveragePathIgnorePatterns: ['/node_modules/'],
+
+    // A list of reporter names that Jest uses when writing coverage reports
+    // coverageReporters: [
+    //   "json",
+    //   "text",
+    //   "lcov",
+    //   "clover"
+    // ],
+
+    // An object that configures minimum threshold enforcement for coverage results
+    // coverageThreshold: null,
+
+    // Make calling deprecated APIs throw helpful error messages
+    // errorOnDeprecated: false,
+
+    // Force coverage collection from ignored files usin a array of glob patterns
+    // forceCoverageMatch: [],
+
+    // A path to a module which exports an async function that is triggered once before all test suites
+    // globalSetup: null,
+
+    // A path to a module which exports an async function that is triggered once after all test suites
+    // globalTeardown: null,
+
+    // A set of global variables that need to be available in all test environments
+    globals: {
+      'ts-jest': {
+        tsConfig: 'tsconfig.json',
+        diagnostics: false
+      },
+      'vue-jest': {
+        babelConfig: false
+      }
+    },
+
+    // An array of directory names to be searched recursively up from the requiring module's location
+    // moduleDirectories: [
+    //   "node_modules"
+    // ],
+
+    // An array of file extensions your modules use
+    moduleFileExtensions: ['ts', 'js', 'json', 'vue'],
+
+    // A map from regular expressions to module names that allow to stub out resources with a single module
+    moduleNameMapper: {
+      '^@/(.*)$': '<rootDir>/src/$1',
+      '\\.(css|less|sass|scss|styl)$': '<rootDir>/__mocks__/styleMock.js'
+    },
+
+    // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+    // modulePathIgnorePatterns: [],
+
+    // Activates notifications for test results
+    // notify: false,
+
+    // An enum that specifies notification mode. Requires { notify: true }
+    // notifyMode: "always",
+
+    // A preset that is used as a base for Jest's configuration
+    // preset: null,
+
+    // Run tests from one or more projects
+    // projects: null,
+
+    // Use this configuration option to add custom reporters to Jest
+    // reporters: undefined,
+
+    // Automatically reset mock state between every test
+    // resetMocks: false,
+
+    // Reset the module registry before running each individual test
+    // resetModules: false,
+
+    // A path to a custom resolver
+    // resolver: null,
+
+    // Automatically restore mock state between every test
+    // restoreMocks: false,
+
+    // The root directory that Jest should scan for tests and modules within
+    // rootDir: null,
+
+    // A list of paths to directories that Jest should use to search for files in
+    // roots: [
+    //   "<rootDir>"
+    // ],
+
+    // Allows you to use a custom runner instead of Jest's default test runner
+    // runner: "jest-runner",
+
+    // The paths to modules that run some code to configure or set up the testing environment before each test
+    // setupFiles: [],
+
+    // The path to a module that runs some code to configure or set up the testing framework before each test
+    // setupTestFrameworkScriptFile: null,
+
+    // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+    // snapshotSerializers: [],
+
+    // The test environment that will be used for testing
+    // testEnvironment: "jest-environment-jsdom",
+
+    // Options that will be passed to the testEnvironment
+    // testEnvironmentOptions: {},
+
+    // Adds a location field to test results
+    // testLocationInResults: false,
+
+    // The glob patterns Jest uses to detect test files
+    testMatch: [
+      //   "**/__tests__/**/*.[jt]s?(x)",
+      // "**/?(*.)+(spec|test).[tj]s?(x)"
+      '**/__tests__/**/(*.)+(spec|test).ts'
+    ],
+
+    // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+    testPathIgnorePatterns: ['/node_modules/', '/dist/'],
+
+    // The regexp pattern Jest uses to detect test files
+    // testRegex: "",
+
+    // This option allows the use of a custom results processor
+    // testResultsProcessor: null,
+
+    // This option allows use of a custom test runner
+    // testRunner: "jasmine2",
+
+    // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
+    // testURL: "http://localhost",
+
+    // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
+    // timers: "real",
+
+    // A map from regular expressions to paths to transformers
+    transform: {
+      '.+\\.jsx?$': 'babel-jest',
+      '.+\\.tsx?$': 'ts-jest',
+      '.+\\.(vue)$': 'vue-jest'
+    },
+
+    // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+    transformIgnorePatterns: [
+      '/node_modules/',
+      '<rootDir>/node_modules/(?!vuetify)'
+    ]
+
+    // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+    // unmockedModulePathPatterns: undefined,
+
+    // Indicates whether each individual test should be reported during the run
+    // verbose: null,
+
+    // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+    // watchPathIgnorePatterns: [],
+
+    // Whether to use watchman for file crawling
+    // watchman: true,
+  };