add --prefer-ts adn --prefer-ts-exts tests

Author: wclr

README.md

@@ -39,8 +39,8 @@ tsnd --respawn server.ts
 
 **Also there are additional options specific to `ts-node-dev`:**
 
-- `--prefer-ts` (default: false) - for each `.js` file (that is not in `node_modules`) will try to check if corresponding `.ts` version exists and require it.
-- `--ignore-watch` (default: []) - files/folders to be [ignored by `node-dev`](https://github.com/fgnass/node-dev#ignore-paths). **But also this behaviour enhanced:** it will also make up `new RegExp` of passed ignore string and check absolute paths of required files for match.
+- `--prefer-ts` (`--prefer-ts-exts`) - (default: false) - For each `.js` file (that is not in `node_modules`) will try to check if corresponding `.ts` version exists and require it.
+- `--ignore-watch` - (default: []) - files/folders to be [ignored by `node-dev`](https://github.com/fgnass/node-dev#ignore-paths). **But also this behaviour enhanced:** it will also make up `new RegExp` of passed ignore string and check absolute paths of required files for match.
   So, to ignore everything in `node_modules`, just pass `--ignore-watch node_modules`, or us `--no-deps` for the same effect.
 
 - `--debug` - Some additional debug output.

lib/compiler.js

@@ -70,7 +70,7 @@ var compiler = {
     if (compiler.allowJs) {
       fileData = fileData.replace('allowJs = false', 'allowJs = true')
     }
-    if (options['prefer-ts']) {
+    if (options['prefer-ts'] || options['prefer-ts-exts']) {
       fileData = fileData.replace('preferTs = false', 'preferTs = true')
     }
     if (options['exec-check']) {
@@ -199,7 +199,7 @@ var compiler = {
         options['ignoreDiagnostics'] || options['ignore-diagnostics'],
       logError: options['log-error'],
       disableWarnings: options['disableWarnings'],
-      preferTsExts: options['prefer-ts-exts'],
+      preferTsExts: options['prefer-ts-exts'] || options['prefer-ts'],
       compilerOptions: compilerOptions,
       files: options['files'] || true,
     }

test/fixture/prefer/prefer-dep.js

@@ -0,0 +1 @@
+console.log('PREFER DEP JS')

test/fixture/prefer/prefer-dep.ts

@@ -0,0 +1 @@
+console.log('PREFER DEP TS')

test/fixture/prefer/prefer.js

@@ -0,0 +1,2 @@
+require('./prefer-dep')
+console.log('PREFER JS')

test/fixture/prefer/prefer.ts

@@ -0,0 +1,2 @@
+import './prefer-dep'
+console.log('PREFER TS')

test/index.ts

@@ -189,3 +189,45 @@ test('It allows to use custom TS Transformers', async (t) => {
   await ps.waitForLine(/transformed/)
   await ps.exit()
 })
+//
+test.only('It should --prefer-ts', async (t) => {
+  t.test('Should require JS by default', async (t) => {
+    const ps = spawnTsNodeDev(
+      [
+        `--respawn`,
+        //`--prefer-ts-exts`,
+        `prefer/prefer.js`,
+      ].join(' ')
+    ).turnOnOutput()
+    await ps.waitForLine(/PREFER DEP JS/)
+    await ps.waitForLine(/PREFER JS/)
+    await ps.exit()
+    t.pass()
+  })
+  t.test('SHould require JS deps by default', async (t) => {
+    const ps = spawnTsNodeDev(
+      [
+        `--respawn`,
+        //`--prefer-ts`,
+        `prefer/prefer`,
+      ].join(' ')
+    ).turnOnOutput()
+    await ps.waitForLine(/PREFER DEP JS/)
+    await ps.waitForLine(/PREFER TS/)
+    await ps.exit()
+    t.pass()
+  })
+  t.test('Use require all TS with --ts-prefer', async (t) => {
+    const ps = spawnTsNodeDev(
+      [
+        `--respawn`,
+        `--prefer-ts-exts`,
+        `prefer/prefer.js`,
+      ].join(' ')
+    ).turnOnOutput()
+    await ps.waitForLine(/PREFER DEP TS/)
+    await ps.waitForLine(/PREFER TS/)
+    await ps.exit()
+    t.pass()
+  })
+})