Travis build improvements (#14)

* Trial turning off xdebug

* Remove composer `--dev` warning

* Add composer cache

* Add badges to README

* Add php 7.2

* Using --prefer-lowest means we need to polyfill phpunit 5.0 test case class

* Trial running travis with lowest dependencies

* Check folder structure - to be removed

* Do not need that many lowest deps builds

* Remove debug line

* Not using mongodb in these tests

* Move to simpler bash test for existence

* Attempt to fix the composer update error

* Trial with ignore platform reqs for composer pre-build

* Remove accidentally committed composer change

* Move pre-run composer update

* Move pre-run composer update comment

* Prefer dist for all composer calls

* Fix php7.2 lowest dependencies build

* Add comment making it obvious php mongodb adapter is pinned to lowest

.travis.yml

@@ -1,21 +1,37 @@
-sudo: false
 language: php
+sudo: false
+
+cache:
+  directories:
+    - $HOME/.composer/cache/files
 
 matrix:
   include:
+    # Test the latest
     - php: 5.6
       env: MONGO_VERSION=stable
     - php: 7.1
       env: ADAPTER_VERSION="^1.0.0" MONGODB_VERSION=stable
+    - php: 7.2
+      env: ADAPTER_VERSION="^1.0.0" MONGODB_VERSION=stable
 
-services: mongodb
+    # Test with the lowest deps
+    - php: 5.6
+      env: MONGO_VERSION=stable COMPOSER_FLAGS="--prefer-stable --prefer-lowest --prefer-dist"
+    - php: 7.2
+    # Note that the ADAPTER_VERSION is pinned to 1.0.0 when testing lowest deps
+      env: ADAPTER_VERSION="1.0.0" MONGODB_VERSION=stable COMPOSER_FLAGS="--prefer-stable --prefer-lowest --prefer-dist"
 
 before_script:
-  - if [ "x${MONGO_VERSION}" != "x" ]; then yes '' | pecl -q install -f mongo-${MONGO_VERSION}; fi
-  - if [ "x${MONGODB_VERSION}" != "x" ]; then pecl install -f mongodb-${MONGODB_VERSION}; fi
-  - if [ "x${ADAPTER_VERSION}" != "x" ]; then composer require "alcaeus/mongo-php-adapter=${ADAPTER_VERSION}" --ignore-platform-reqs; fi
+  # Not using code coverage
+  - phpenv config-rm xdebug.ini
+  - if ! [ -z "$MONGO_VERSION" ]; then yes '' | pecl -q install -f mongo-${MONGO_VERSION}; fi
+  - if ! [ -z "$MONGODB_VERSION" ]; then pecl install -f mongodb-${MONGODB_VERSION}; fi
+  - if ! [ -z "$ADAPTER_VERSION" ]; then composer require "alcaeus/mongo-php-adapter=${ADAPTER_VERSION}" --ignore-platform-reqs; fi
   - composer self-update
-  - composer install --dev
+  # To be removed when this issue will be resolved: https://github.com/composer/composer/issues/5355
+  - if [[ "$COMPOSER_FLAGS" == *"--prefer-lowest"* ]]; then composer update --prefer-dist --no-interaction --prefer-stable --ignore-platform-reqs --quiet; fi
+  - composer update -v ${COMPOSER_FLAGS}
 
 script:
   - ./vendor/bin/phpunit

README.md

@@ -1,3 +1,7 @@
+[![Build Status](https://travis-ci.org/doesntmattr/mongodb-migrations-bundle.svg?branch=master)](https://travis-ci.org/doesntmattr/mongodb-migrations-bundle)
+[![Latest Stable Version](https://poser.pugx.org/doesntmattr/mongodb-migrations-bundle/v/stable)](https://packagist.org/packages/doesntmattr/mongodb-migrations-bundle)
+[![Total Downloads](https://poser.pugx.org/doesntmattr/mongodb-migrations-bundle/downloads)](https://packagist.org/packages/doesntmattr/mongodb-migrations-bundle)
+
 :warning: Forked from [antimattr/mongodb-migrations-bundle](https://github.com/antimattr/mongodb-migrations-bundle) for contributors as the original project isn't being maintained. See [issue 16](https://github.com/antimattr/mongodb-migrations/issues/16)
 
 The original authors did an awesome job of making a library that has been really

Tests/bootstrap.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace PHPUnit\Framework;
+
+$class = 'PHPUnit\Framework\TestCase';
+
+if (!class_exists($class)) {
+
+    abstract class TestCase extends \PHPUnit_Framework_TestCase
+    {
+    }
+}

phpunit.xml.dist

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit colors="true">
+<phpunit colors="true"
+    bootstrap="Tests/bootstrap.php"
+    >
     <testsuites>
         <testsuite name="Doesntmattr MongoDB Migrations Bundle Tests">
             <directory>./Tests/</directory>