Fix an issue with the TestcontainersConfiguration.getInstance().getEnvVarOrUserProperty checking if the value is not empty

Author: fokion

core/src/main/java/org/testcontainers/containers/ComposeContainer.java

@@ -62,7 +62,7 @@ public class ComposeContainer extends FailureDetectingExternalResource implement
 
     public static final String COMPOSE_EXECUTABLE = SystemUtils.IS_OS_WINDOWS ? "docker.exe" : "docker";
 
-    public static final String DEFAULT_DOCKER_IMAGE = "docker:27.5.0";
+    private static final String DEFAULT_DOCKER_IMAGE = "docker:27.5.0";
 
     private final ComposeDelegate composeDelegate;
 

core/src/main/java/org/testcontainers/containers/DockerComposeContainer.java

@@ -88,7 +88,7 @@ public DockerComposeContainer(DockerImageName image, String identifier, File...
     public DockerComposeContainer(DockerImageName image, String identifier, List<File> composeFiles) {
         this.composeDelegate =
             new ComposeDelegate(
-                ComposeDelegate.ComposeVersion.V2,
+                ComposeDelegate.ComposeVersion.V1,
                 composeFiles,
                 identifier,
                 COMPOSE_EXECUTABLE,
@@ -126,7 +126,7 @@ public DockerComposeContainer(String identifier, List<File> composeFiles) {
                 composeFiles,
                 identifier,
                 COMPOSE_EXECUTABLE,
-                getDockerImageName()
+                DockerImageName.parse("docker/compose:1.29.2")
             );
         this.project = this.composeDelegate.getProject();
     }

core/src/main/java/org/testcontainers/utility/TestcontainersConfiguration.java

@@ -244,7 +244,7 @@ private String getConfigurable(
         }
 
         for (final Properties properties : propertiesSources) {
-            if (properties.get(propertyName) != null) {
+            if (properties.get(propertyName) != null && !properties.get(propertyName).toString().trim().isEmpty()) {
                 return (String) properties.get(propertyName);
             }
         }