--- /dev/null
+<?php
+
+namespace Drupal\Tests\system\Functional\Module;
+
+/**
+ * Tests module version dependencies.
+ *
+ * @group Module
+ */
+class VersionTest extends ModuleTestBase {
+
+ /**
+ * Test version dependencies.
+ */
+ public function testModuleVersions() {
+ $dependencies = [
+ // Alternating between being compatible and incompatible with 8.x-2.4-beta3.
+ // The first is always a compatible.
+ 'common_test',
+ // Branch incompatibility.
+ 'common_test (1.x)',
+ // Branch compatibility.
+ 'common_test (2.x)',
+ // Another branch incompatibility.
+ 'common_test (>2.x)',
+ // Another branch compatibility.
+ 'common_test (<=2.x)',
+ // Another branch incompatibility.
+ 'common_test (<2.x)',
+ // Another branch compatibility.
+ 'common_test (>=2.x)',
+ // Nonsense, misses a dash. Incompatible with everything.
+ 'common_test (=8.x2.x, >=2.4)',
+ // Core version is optional. Compatible.
+ 'common_test (=8.x-2.x, >=2.4-alpha2)',
+ // Test !=, explicitly incompatible.
+ 'common_test (=2.x, !=2.4-beta3)',
+ // Three operations. Compatible.
+ 'common_test (=2.x, !=2.3, <2.5)',
+ // Testing extra version. Incompatible.
+ 'common_test (<=2.4-beta2)',
+ // Testing extra version. Compatible.
+ 'common_test (>2.4-beta2)',
+ // Testing extra version. Incompatible.
+ 'common_test (>2.4-rc0)',
+ ];
+ \Drupal::state()->set('system_test.dependencies', $dependencies);
+ $n = count($dependencies);
+ for ($i = 0; $i < $n; $i++) {
+ $this->drupalGet('admin/modules');
+ $checkbox = $this->xpath('//input[@id="edit-modules-module-test-enable"]');
+ $this->assertEqual(!empty($checkbox[0]->getAttribute('disabled')), $i % 2, $dependencies[$i]);
+ }
+ }
+
+}