Preliminary support for PCOV (#667)

* run_tests.bash: test only with PCOV

* Preliminary support for PCOV

* Update README.md

[skip ci]

src/Console/Application.php

@@ -188,6 +188,8 @@ private function logRunningWithDebugger(): void
             $this->consoleOutput->logRunningWithDebugger(\PHP_SAPI);
         } elseif (\extension_loaded('xdebug')) {
             $this->consoleOutput->logRunningWithDebugger('Xdebug');
+        } elseif (\extension_loaded('pcov')) {
+            $this->consoleOutput->logRunningWithDebugger('PCOV');
         }
     }
 }

src/Process/Coverage/CoverageRequirementChecker.php

@@ -63,6 +63,7 @@ public function hasDebuggerOrCoverageOption(): bool
         return $this->skipCoverage
             || \PHP_SAPI === 'phpdbg'
             || \extension_loaded('xdebug')
+            || \extension_loaded('pcov')
             || XdebugHandler::getSkippedVersion()
             || $this->isXdebugIncludedInInitialTestPhpOptions();
     }

tests/Fixtures/e2e/PCOV_PHPUnit8/README.md

@@ -0,0 +1,8 @@
+# Test Infection with PCOV and PHPUnit 8
+
+https://github.com/infection/infection/issues/665
+
+## Summary
+
+...the issue boils down to Infection not being aware of PCOV as a coverage driver.
+

tests/Fixtures/e2e/PCOV_PHPUnit8/composer.json

@@ -0,0 +1,15 @@
+{
+    "require-dev": {
+        "phpunit/phpunit": "^8"
+    },
+    "autoload": {
+        "psr-4": {
+            "PCOV_PHPUnit8\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "PCOV_PHPUnit8\\Test\\": "tests/"
+        }
+    }
+}

tests/Fixtures/e2e/PCOV_PHPUnit8/expected-output.txt

@@ -0,0 +1,6 @@
+Total: 1
+Killed: 1
+Errored: 0
+Escaped: 0
+Timed Out: 0
+Not Covered: 0

tests/Fixtures/e2e/PCOV_PHPUnit8/infection.json

@@ -0,0 +1,12 @@
+{
+    "timeout": 25,
+    "source": {
+        "directories": [
+            "src"
+        ]
+    },
+    "logs": {
+        "summary": "infection.log"
+    },
+    "tmpDir": "."
+}

tests/Fixtures/e2e/PCOV_PHPUnit8/phpunit.xml.dist

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
+         bootstrap="./vendor/autoload.php"
+         colors="true"
+>
+    <testsuites>
+        <testsuite name="Test Suite">
+            <directory>./tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>./src/</directory>
+        </whitelist>
+    </filter>
+</phpunit>

tests/Fixtures/e2e/PCOV_PHPUnit8/run_tests.bash

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+set -e
+
+tputx () {
+	test -x $(which tput) && tput "$@"
+}
+
+run () {
+    local INFECTION=${1}
+    local PHPARGS=${2}
+
+    if [ "$PHPDBG" = "1" ]
+    then
+        phpdbg $PHPARGS -qrr $INFECTION
+    else
+        php $PHPARGS $INFECTION
+    fi
+}
+
+cd $(dirname "$0")
+
+if [ "$PHPDBG" = "1" ]
+then
+    exit 0
+fi
+
+if php -r "exit(version_compare(PHP_VERSION, '7.3.0'));"
+then
+    exit 0
+fi
+
+tputx bold
+echo "Checking for PCOV..."
+tputx sgr0
+
+
+if ! php --ri pcov
+then
+    tput setaf 1 # red
+    echo "PCOV not detected"
+    exit 0
+fi
+
+readonly INFECTION=../../../../${1}
+
+set -e pipefail
+
+php $INFECTION
+
+diff -w expected-output.txt infection.log
+

tests/Fixtures/e2e/PCOV_PHPUnit8/src/SourceClass.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace PCOV_PHPUnit8;
+
+class SourceClass
+{
+    public function hello(): string
+    {
+        return 'hello';
+    }
+}

tests/Fixtures/e2e/PCOV_PHPUnit8/tests/SourceClassTest.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace PCOV_PHPUnit8\Test;
+
+use PCOV_PHPUnit8\SourceClass;
+use PHPUnit\Framework\TestCase;
+
+class SourceClassTest extends TestCase
+{
+    public function test_hello()
+    {
+        $sourceClass = new SourceClass();
+        $this->assertSame('hello', $sourceClass->hello());
+    }
+}