Fixing TypeScript warnings, upgrade to Travis Trusty.

.travis.yml

@@ -1,23 +1,24 @@
+dist: trusty
+sudo: false
 language: node_js
 node_js:
-  - "4"
-
-sudo: false
+  - "8"
 
 cache:
   yarn: true
-  directories:
-    - node_modules
 
 before_install:
-  - "node --version"
-  - "npm --version"
-  - "nvm --version"
-  - "firefox --version"
+  - node --version
+  - yarn --version
+  - nvm --version
+  - firefox --version
 
 before_script:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 
+install:
+  - yarn install
+
 script:
-  - "npm test"
+  - yarn test

test/tests/fs/OverlayFS/delete-log-test.ts

@@ -8,6 +8,8 @@ const logPath = '/.deletedFiles.log';
 declare var __numWaiting: number;
 
 export default function() {
+  // HACK around TypeScript bug.
+  if (__numWaiting) {}
   var rootFS = (<OverlayFS> fs.getRootFS()).unwrap(),
     fses = rootFS.getOverlayedFileSystems(),
     // XXX: Make these proper API calls.

test/tests/fs/all/node-fs-write-file-sync.ts

@@ -4,7 +4,7 @@ import assert from '../../../harness/wrapped-assert';
 import common from '../../../harness/common';
 
 export default function() {
-  var openCount = 0;
+  //var openCount = 0;
   var mode: number;
   var content: string;
   var rootFS = fs.getRootFS();
@@ -22,12 +22,12 @@ export default function() {
   }
 
   function openSync() {
-    openCount++;
+    //openCount++;
     return (<any>rootFS)._openSync.apply(rootFS, arguments);
   }
 
   function closeSync() {
-    openCount--;
+    //openCount--;
     return (<any>fs)._closeSync.apply(fs, arguments);
   }
 

test/tests/general/check-options-test.ts

@@ -46,7 +46,8 @@ function errorMessageAssert(expectedMsgs: string[], unexpectedMsgs: string[] = [
 }
 
 export default function() {
-
+  // HACK around TypeScript bug.
+  if (__numWaiting) {}
   const emptyOptionsFS = getFileSystem({});
   checkOptions(emptyOptionsFS, {}, noErrorAssert);
   // Tolerates unrecognized options.