fix: DockerDesktopClientProviderStrategy#isApplicable to check the resolved socket path

core/src/main/java/org/testcontainers/dockerclient/DockerDesktopClientProviderStrategy.java

@@ -66,7 +66,7 @@ public String getRemoteDockerUnixSocketPath() {
 
     @Override
     protected boolean isApplicable() {
-        return (SystemUtils.IS_OS_LINUX || SystemUtils.IS_OS_MAC) && this.socketPath != null;
+        return (SystemUtils.IS_OS_LINUX || SystemUtils.IS_OS_MAC) && getSocketPath() != null;
     }
 
     private Optional<Path> tryFolder(Path path) {

core/src/test/java/org/testcontainers/dockerclient/DockerDesktopClientProviderStrategyTest.java

@@ -0,0 +1,53 @@
+package org.testcontainers.dockerclient;
+
+import org.apache.commons.lang3.SystemUtils;
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assumptions.assumeThat;
+
+class DockerDesktopClientProviderStrategyTest {
+
+    /**
+     * The lazily resolved socket path should be {@code null} when no Docker Desktop
+     * socket is present under {@code user.home}.
+     */
+    @Test
+    void socketPathIsNullWhenNoDockerDesktopSocketExists() throws Exception {
+        String originalHome = System.getProperty("user.home");
+        Path emptyHome = Files.createTempDirectory("tc-no-docker-desktop");
+        System.setProperty("user.home", emptyHome.toString());
+        try {
+            assertThat(new DockerDesktopClientProviderStrategy().getSocketPath()).isNull();
+        } finally {
+            System.setProperty("user.home", originalHome);
+        }
+    }
+
+    /**
+     * Regression test for #11829: previously {@code isApplicable()} always returned
+     * {@code true} on Linux/macOS because {@code @Getter(lazy = true)} turns the field
+     * into an {@code AtomicReference}, whose instance is never {@code null}.
+     *
+     * <p>Only meaningful on Linux/macOS, where the strategy is eligible in the first place.
+     */
+    @Test
+    void notApplicableWhenNoDockerDesktopSocketExists() throws Exception {
+        assumeThat(SystemUtils.IS_OS_LINUX || SystemUtils.IS_OS_MAC).isTrue();
+
+        String originalHome = System.getProperty("user.home");
+        Path emptyHome = Files.createTempDirectory("tc-no-docker-desktop");
+        System.setProperty("user.home", emptyHome.toString());
+        try {
+            DockerDesktopClientProviderStrategy strategy = new DockerDesktopClientProviderStrategy();
+
+            assertThat(strategy.getSocketPath()).isNull();
+            assertThat(strategy.isApplicable()).isFalse();
+        } finally {
+            System.setProperty("user.home", originalHome);
+        }
+    }
+}