Test against symfony versions

.travis.yml

@@ -8,14 +8,6 @@ cache:
     directories:
         - $HOME/.composer/cache/files
 
-php:
-    - 5.4
-    - 5.5
-    - 5.6
-    - 7.0
-    - 7.1
-    - hhvm
-
 env:
     global:
         - TEST_COMMAND="composer test"
@@ -27,11 +19,33 @@ branches:
 matrix:
     fast_finish: true
     include:
+          # Minimum supported PHP and Symfony version
         - php: 5.4
-          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
-
+          env: DEPENDENCIES="minimun" COVERAGE=true TEST_COMMAND="composer test-ci"
+
+          # Test the latest stable release
+        - php: 7.1
+
+          # Test LTS versions
+        - php: 7.1
+          env: DEPENDENCIES="symfony/lts:v2"
+        - php: 7.1
+          env: DEPENDENCIES="symfony/lts:v3"
+
+          # Latest beta release
+        - php: 7.1
+          env: DEPENDENCIES="beta"
+
+    allow_failures:
+          # Latest beta is allowed to fail.
+        - php: 7.1
+          env: DEPENDENCIES="beta"
+
 before_install:
     - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi
+    - if [ "$DEPENDENCIES" = "minimun" ]; then COMPOSER_FLAGS="--prefer-stable --prefer-lowest"; fi;
+    - if [ "$DEPENDENCIES" = "beta" ]; then composer config minimum-stability beta; fi;
+    - if [[ $DEPENDENCIES == *"/"* ]]; then composer require --no-update $DEPENDENCIES; fi;
 
 install:
     # To be removed when this issue will be resolved: https://github.com/composer/composer/issues/5355

composer.json

@@ -15,7 +15,7 @@
         "php-http/httplug": "^1.1",
         "php-http/message-factory": "^1.0",
         "php-http/message": "^1.6",
-        "symfony/options-resolver": "^2.6 || ^3.0 || ^4.0"
+        "symfony/options-resolver": "^2.6 || ^3.0"
     },
     "require-dev": {
         "phpspec/phpspec": "^2.4",

src/Plugin/AddHostPlugin.php

@@ -33,7 +33,7 @@ final class AddHostPlugin implements Plugin
      */
     public function __construct(UriInterface $host, array $config = [])
     {
-        if ($host->getHost() === '') {
+        if ('' === $host->getHost()) {
             throw new \LogicException('Host can not be empty');
         }
 
@@ -51,7 +51,7 @@ public function __construct(UriInterface $host, array $config = [])
      */
     public function handleRequest(RequestInterface $request, callable $next, callable $first)
     {
-        if ($this->replace || $request->getUri()->getHost() === '') {
+        if ($this->replace || '' === $request->getUri()->getHost()) {
             $uri = $request->getUri()
                 ->withHost($this->host->getHost())
                 ->withScheme($this->host->getScheme())

src/Plugin/AddPathPlugin.php

@@ -23,11 +23,11 @@ final class AddPathPlugin implements Plugin
      */
     public function __construct(UriInterface $uri)
     {
-        if ($uri->getPath() === '') {
+        if ('' === $uri->getPath()) {
             throw new \LogicException('URI path cannot be empty');
         }
 
-        if (substr($uri->getPath(), -1) === '/') {
+        if ('/' === substr($uri->getPath(), -1)) {
             throw new \LogicException('URI path cannot end with a slash.');
         }
 

src/Plugin/ContentTypePlugin.php

@@ -102,7 +102,7 @@ private function isJson($stream)
 
         json_decode($stream->getContents());
 
-        return json_last_error() == JSON_ERROR_NONE;
+        return JSON_ERROR_NONE == json_last_error();
     }
 
     /**

src/Plugin/CookiePlugin.php

@@ -51,7 +51,7 @@ public function handleRequest(RequestInterface $request, callable $next, callabl
                 continue;
             }
 
-            if ($cookie->isSecure() && ($request->getUri()->getScheme() !== 'https')) {
+            if ($cookie->isSecure() && ('https' !== $request->getUri()->getScheme())) {
                 continue;
             }
 

src/Plugin/DecoderPlugin.php

@@ -123,15 +123,15 @@ private function decodeOnEncodingHeader($headerName, ResponseInterface $response
      */
     private function decorateStream($encoding, StreamInterface $stream)
     {
-        if (strtolower($encoding) == 'chunked') {
+        if ('chunked' == strtolower($encoding)) {
             return new Encoding\DechunkStream($stream);
         }
 
-        if (strtolower($encoding) == 'deflate') {
+        if ('deflate' == strtolower($encoding)) {
             return new Encoding\DecompressStream($stream);
         }
 
-        if (strtolower($encoding) == 'gzip') {
+        if ('gzip' == strtolower($encoding)) {
             return new Encoding\GzipDecodeStream($stream);
         }