Add support for !override docker compose tag (#11490)

Author: meck-gd

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

@@ -50,7 +50,7 @@ class ParsedDockerComposeFile {
         SafeConstructor constructor = new SafeConstructor(options) {
             @Override
             protected Object constructObject(Node node) {
-                if (node.getTag().equals(new Tag("!reset"))) {
+                if (node.getTag().equals(new Tag("!reset")) || node.getTag().equals(new Tag("!override"))) {
                     return null;
                 }
                 return super.constructObject(node);

core/src/test/java/org/testcontainers/junit/ComposeContainerOverrideTest.java

@@ -45,4 +45,35 @@ void resetEnvironment() {
             assertThat(container.getConfig().getEnv()).doesNotContain("foo=bar");
         }
     }
+
+    @Test
+    void readLabel() {
+        try (
+            ComposeContainer compose = new ComposeContainer(DockerImageName.parse("docker:25.0.5"), BASE)
+                .withExposedService("redis", 6379)
+        ) {
+            compose.start();
+            InspectContainerResponse container = compose
+                .getContainerByServiceName("redis-1")
+                .map(ContainerState::getContainerInfo)
+                .get();
+            assertThat(container.getConfig().getLabels()).containsKey("label1");
+        }
+    }
+
+    @Test
+    void readOverriddenLabel() {
+        try (
+            ComposeContainer compose = new ComposeContainer(DockerImageName.parse("docker:25.0.5"), BASE, OVERRIDE)
+                .withExposedService("redis", 6379)
+        ) {
+            compose.start();
+            InspectContainerResponse container = compose
+                .getContainerByServiceName("redis-1")
+                .map(ContainerState::getContainerInfo)
+                .get();
+            assertThat(container.getConfig().getLabels()).doesNotContainKey("label1");
+            assertThat(container.getConfig().getLabels()).containsKey("label2");
+        }
+    }
 }

core/src/test/resources/compose-override/compose-override.yml

@@ -5,3 +5,5 @@ services:
       - 6379
     environment:
       foo: !reset null
+    labels: !override
+      label2: value2

core/src/test/resources/compose-override/compose.yml

@@ -5,3 +5,5 @@ services:
       - 6379
     environment:
       foo: bar
+    labels:
+      label1: value1