feat(karma-mocha): types for v1.3 (#42371)

- type definition
- tests

Thanks!

types/karma-mocha/index.d.ts

@@ -0,0 +1,22 @@
+// Type definitions for karma-mocha 1.3
+// Project: https://github.com/karma-runner/karma-mocha#readme
+// Definitions by: Piotr Błażejewicz (Peter Blazejewicz) <https://github.com/peterblazejewicz>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.2
+
+import 'karma';
+
+declare module 'karma' {
+    interface ClientOptions {
+        mocha?: MochaClientOptions;
+    }
+
+    interface MochaClientOptions {
+        /** This will be exposed in a reporter as `result.mocha.{exportedValue}` */
+        export?: string[];
+        /** You can set opts to equal true then plugin will load opts from default location 'test/mocha.opts' */
+        opts?: true | string;
+        /** any supported Mocha configuration options */
+        [key: string]: any;
+    }
+}

types/karma-mocha/karma-mocha-tests.ts

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+import karma = require('karma');
+
+module.exports = (config: karma.Config) => {
+    config.set({
+        frameworks: ['mocha', 'chai'],
+        files: ['src/**/*.js', 'test/**/*.js'],
+        reporters: ['progress'],
+        port: 9876, // karma web server port
+        colors: true,
+        logLevel: config.LOG_INFO,
+        browsers: ['Chrome'],
+        autoWatch: false,
+        concurrency: Infinity,
+        client: {
+            mocha: {
+                // karma-mocha options
+                expose: ['body '],
+                // opts: './test/mocha.opts',
+                opts: true,
+                // mocha options
+                ui: 'bdd',
+            },
+        },
+    });
+};
+
+const mochaClientOptionsTestOne: karma.MochaClientOptions = {
+    expose: [],
+    opts: true,
+    ui: 'bdd',
+};
+
+const mochaClientOptionsTestTwo: karma.MochaClientOptions = {
+    expose: ['body'],
+    opts: 'test/mocha.opts',
+    ui: 'bdd',
+};
+
+const mochaClientOptionsTestThree: karma.MochaClientOptions = {
+    ui: 'bdd',
+};

types/karma-mocha/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "karma-mocha-tests.ts"
+    ]
+}

types/karma-mocha/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }