Try to add coverage tests

.ddev/php/xdebug.ini

@@ -0,0 +1 @@
+xdebug.mode=coverage

.github/workflows/unittests.yml

@@ -19,4 +19,9 @@ jobs:
       - run: cp .github/assets/SearchIndex.php.test app/src/SearchIndex.php
       - run: cp example.env .env
       - run: ddev sake dev/build
-      - run: ddev exec phpunit tests
+      - run: ddev xdebug
+      - run: ddev exec phpunit tests --coverage-clover ./coverage.xml
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.phpunit.result.cache

@@ -0,0 +1 @@
+{"version":1,"defects":{"Firesphere\\ElasticSearch\\Tests\\EndToEndTest::testSearching":4,"Firesphere\\ElasticSearch\\Extensions\\DataObjectElasticExtensionTest::testCreatingObject":4,"Firesphere\\ElasticSearch\\Extensions\\DataObjectElasticExtensionTest::testOnAfterDelete":4,"Firesphere\\ElasticSearch\\Queries\\QueryBuilderTest::testBuildQuery":4,"Firesphere\\ElasticSearch\\Tests\\ElasticCoreServiceTest::testUpdateIndex":4},"times":{"Firesphere\\ElasticSearch\\Tests\\EndToEndTest::testSearching":0.005,"Firesphere\\ElasticSearch\\Extensions\\DataObjectElasticExtensionTest::testCreatingObject":2.175,"Firesphere\\ElasticSearch\\Extensions\\DataObjectElasticExtensionTest::testOnAfterDelete":2.074,"Firesphere\\ElasticSearch\\Tests\\SynonymSetTest::testRequireDefaultRecords":1.764,"Firesphere\\ElasticSearch\\Queries\\QueryBuilderTest::testBuildQuery":0.002,"Firesphere\\ElasticSearch\\Tests\\ElasticCoreServiceTest::testConstruct":0.121,"Firesphere\\ElasticSearch\\Tests\\ElasticCoreServiceTest::testUpdateIndex":0.132,"Firesphere\\ElasticSearch\\Tasks\\ConfigureSynonymsTaskTest::testRun":0.482}}

phpunit.xml.dist

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Standard module phpunit configuration.
+Requires PHPUnit ^9
+-->
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/silverstripe/framework/tests/bootstrap.php" colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage includeUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">.</directory>
+    </include>
+    <exclude>
+      <directory suffix=".php">tests/</directory>
+      <directory suffix=".php">thirdparty/</directory>
+    </exclude>
+  </coverage>
+  <testsuites>
+    <testsuite name="Default">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>