Make these checks more granular

Author: sebastianbergmann

tests/tests/Driver/PcovDriverTest.php

@@ -13,14 +13,21 @@
 use SebastianBergmann\CodeCoverage\DeadCodeDetectionNotSupportedException;
 use SebastianBergmann\CodeCoverage\Filter;
 use SebastianBergmann\CodeCoverage\TestCase;
-use SebastianBergmann\Environment\Runtime;
 
 final class PcovDriverTest extends TestCase
 {
     protected function setUp(): void
     {
-        if (!(new Runtime)->hasPCOV()) {
-            $this->markTestSkipped('This test is only applicable to PCOV');
+        if (\PHP_SAPI !== 'cli') {
+            $this->markTestSkipped('This test requires the PHP commandline interpreter');
+        }
+
+        if (!\extension_loaded('pcov')) {
+            $this->markTestSkipped('This test requires the PCOV extension to be loaded');
+        }
+
+        if (!\ini_get('pcov.enabled')) {
+            $this->markTestSkipped('This test requires the PCOV extension to be enabled');
         }
     }
 

tests/tests/Driver/PhpdbgDriverTest.php

@@ -12,14 +12,13 @@
 use SebastianBergmann\CodeCoverage\BranchAndPathCoverageNotSupportedException;
 use SebastianBergmann\CodeCoverage\DeadCodeDetectionNotSupportedException;
 use SebastianBergmann\CodeCoverage\TestCase;
-use SebastianBergmann\Environment\Runtime;
 
 final class PhpdbgDriverTest extends TestCase
 {
     protected function setUp(): void
     {
-        if (!(new Runtime)->hasPHPDBGCodeCoverage()) {
-            $this->markTestSkipped('This test is only applicable to PHPDBG');
+        if (\PHP_SAPI !== 'phpdbg') {
+            $this->markTestSkipped('This test requires the PHPDBG commandline interpreter');
         }
     }
 

tests/tests/Driver/XdebugDriverTest.php

@@ -11,18 +11,25 @@
 
 use SebastianBergmann\CodeCoverage\Filter;
 use SebastianBergmann\CodeCoverage\TestCase;
-use SebastianBergmann\Environment\Runtime;
 
 final class XdebugDriverTest extends TestCase
 {
     protected function setUp(): void
     {
-        if (!(new Runtime)->hasXdebug()) {
-            $this->markTestSkipped('This test is only applicable to Xdebug');
+        if (\PHP_SAPI !== 'cli') {
+            $this->markTestSkipped('This test requires the PHP commandline interpreter');
+        }
+
+        if (!\extension_loaded('xdebug')) {
+            $this->markTestSkipped('This test requires the Xdebug extension to be loaded');
+        }
+
+        if (!\ini_get('xdebug.coverage_enable')) {
+            $this->markTestSkipped('This test requires the Xdebug extension\'s code coverage functionality to be enabled');
         }
 
         if (!\xdebug_code_coverage_started()) {
-            $this->markTestSkipped('This test requires code coverage using Xdebug to be running');
+            $this->markTestSkipped('This test requires code coverage data collection using Xdebug to be active');
         }
     }