renamed "tests/example-usage" to "example-v1.9.8"

added "tests/example-latest-version"
changed ".travis.yml" accordingly

.travis.yml

@@ -21,7 +21,13 @@ before_install:
 script:
   - phpunit --configuration ./tests/phpunit.xml.dist
   # tests
-  - cd ./tests/example-usage && composer install -vvv --profile
+  # fetch "v1.9.8"
+  - cd "$TRAVIS_BUILD_DIR/tests/example-v1.9.8" && composer install -vvv --profile
+  - ls -ashF bin
+  - bin/phantomjs -v
+  - cd $TRAVIS_BUILD_DIR
+  # fetch "latest version"
+  - cd "$TRAVIS_BUILD_DIR/tests/example-latest-version" && composer install -vvv --profile
   - ls -ashF bin
   - bin/phantomjs -v
 

tests/example-latest-version/composer.json

@@ -0,0 +1,16 @@
+{
+    "require": {
+        "jakoch/phantomjs-installer": "dev-master"
+    },
+    "config": {
+        "bin-dir": "bin"
+    },
+    "scripts": {
+        "post-install-cmd": [
+            "PhantomInstaller\\Installer::installPhantomJS"
+        ],
+        "post-update-cmd": [
+            "PhantomInstaller\\Installer::installPhantomJS"
+        ]
+    }
+}