Add test:transpileOnly command

Author: cdimitroulas

README.md

@@ -76,6 +76,11 @@ are using it from a `package.json` script, you can simply write `typescript-scri
 
   Accepts all the usual [mocha CLI flags and options](https://mochajs.org/#command-line-usage).
 
+- `test:transpileOnly`
+
+  Same as the `test` command, except it uses the `transpileOnly` function of the TSC compiler
+  to make it extra fast (this works by only transpiling the code but not checking for errors)
+
 - `compile`
 
   Runs the `tsc` compiler.

index.ts

@@ -2,7 +2,16 @@
 
 "use strict";
 
-import { compile, format, help, init, lint, run, test } from "./scripts";
+import {
+  compile,
+  format,
+  help,
+  init,
+  lint,
+  run,
+  test,
+  testTranspileOnly
+} from "./scripts";
 
 const args = process.argv.slice(2);
 const scriptName = args[0];
@@ -55,6 +64,12 @@ switch (scriptName) {
     break;
   }
 
+  case "test:transpileOnly": {
+    const status = testTranspileOnly();
+    process.exit(status);
+    break;
+  }
+
   default:
     help();
     process.exit(1);

scripts/index.ts

@@ -4,6 +4,6 @@ import help from "./help";
 import init from "./init";
 import lint from "./lint";
 import run from "./run";
-import test from "./test";
+import test, { testTranspileOnly } from "./test";
 
-export { compile, format, help, init, lint, run, test };
+export { compile, format, help, init, lint, run, test, testTranspileOnly };

scripts/test.ts

@@ -5,17 +5,10 @@ import { appDirectory } from "./utils";
 
 const args = process.argv.slice(3);
 
-function test(): number {
+const runMochaProcess = (args: string[]) => {
   const result = spawn.sync(
     path.join(appDirectory, "./node_modules/.bin/mocha"),
-    [
-      "-r",
-      "ts-node/register",
-      "--watch-extensions",
-      "ts",
-      "--recursive",
-      ...args
-    ], // TODO improve this so that sane default mocha flags are set
+    args,
     { stdio: "inherit" }
   );
 
@@ -24,6 +17,33 @@ function test(): number {
   }
 
   return typeof result.status === "number" ? result.status : 1;
+};
+
+function test(): number {
+  const result = runMochaProcess([
+    "-r",
+    "ts-node/register",
+    "--watch-extensions",
+    "ts",
+    "--recursive",
+    ...args
+  ]);
+
+  return result;
+}
+
+function testTranspileOnly(): number {
+  const result = runMochaProcess([
+    "-r",
+    "ts-node/register/transpile-only",
+    "--watch-extensions",
+    "ts",
+    "--recursive",
+    ...args
+  ]);
+
+  return result;
 }
 
 export default test;
+export { testTranspileOnly };