Test PHP 7.3 with ICU 63.1

.travis.yml

@@ -6,6 +6,7 @@ cache:
     directories:
         - vendor
         - $HOME/.composer/cache/files
+        - $HOME/.build
 
 matrix:
     include:
@@ -18,7 +19,7 @@ matrix:
         - php: 7.1
         - php: 7.2
         - php: 7.3
-          env: SYMFONY_PHPUNIT_VERSION=7.2
+          env: SYMFONY_PHPUNIT_VERSION=7.2 ICU_VERSION=63.1
         - php: nightly
     allow_failures:
         - php: nightly
@@ -33,6 +34,29 @@ before_install:
     - if [[ $TRAVIS_PHP_VERSION = 5.* ]]; then echo yes | pecl install -f apcu-4.0.11; fi
     - if [[ $TRAVIS_PHP_VERSION = 7.* ]]; then echo yes | pecl install -f apcu_bc-1.0.4; fi
     - if [[ $TRAVIS_PHP_VERSION = 7.* ]]; then echo yes | pecl install -f apcu-5.1.11; fi
+    - |
+        if [[ $ICU_VERSION ]]; then
+            ICU_DIR=$HOME/.build/icu-$ICU_VERSION
+            ICU_PHP_VERSION=$(php -r "echo PHP_VERSION;")
+            ICU_PHP_DIR=$HOME/.build/php-$ICU_PHP_VERSION-icu-$ICU_VERSION
+            export ICU_PHP=$ICU_PHP_DIR/bin/php
+            if [ ! -f $ICU_PHP ]; then
+                wget -O icu-src.tgz http://download.icu-project.org/files/icu4c/$ICU_VERSION/icu4c-$(echo $ICU_VERSION | tr '.' '_')-src.tgz
+                mkdir icu-src && tar xzf icu-src.tgz -C icu-src --strip-components=1
+                pushd icu-src/source
+                    ./configure --prefix=$ICU_DIR
+                    make && make install
+                popd
+                wget -O php-src.tgz http://us1.php.net/get/php-$ICU_PHP_VERSION.tar.gz/from/this/mirror
+                mkdir php-src && tar xzf php-src.tgz -C php-src --strip-components=1
+                pushd php-src
+                    ./configure --prefix=$ICU_PHP_DIR --enable-intl --with-icu-dir=$ICU_DIR
+                    make && make install
+                popd
+            fi
+            $ICU_PHP -r "echo INTL_ICU_VERSION.PHP_EOL;"
+            $ICU_PHP -r "var_dump((new ReflectionClass('Normalizer'))->getConstants());"
+        fi
     - php -i
 
 install:
@@ -41,3 +65,4 @@ install:
 
 script:
     - ./vendor/bin/simple-phpunit
+    - if [[ $ICU_PHP ]]; then $ICU_PHP ./vendor/bin/simple-phpunit --filter 'Symfony\\Polyfill\\Tests\\Intl'; fi