Fix case-sensitivity bug for port numbers in command

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+### Fixed
+ - Fixed problem with case-sensitivity when checking internal port. ([\#524](https://github.com/testcontainers/testcontainers-java/pull/524))
+
 ### Changed
 - Added `getDatabaseName` method to JdbcDatabaseContainer, MySQLContainer, PostgreSQLContainer ([\#473](https://github.com/testcontainers/testcontainers-java/issues/473))
 

core/src/main/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheck.java

@@ -29,7 +29,7 @@ public Boolean call() {
 
     private void tryPort(Integer internalPort) {
         String[][] commands = {
-                {"/bin/sh", "-c", format("cat /proc/net/tcp | awk '{print $2}' | grep :%x && echo %s", internalPort, SUCCESS_MARKER)},
+                {"/bin/sh", "-c", format("cat /proc/net/tcp | awk '{print $2}' | grep -i :%x && echo %s", internalPort, SUCCESS_MARKER)},
                 {"/bin/sh", "-c", format("nc -vz -w 1 localhost %d && echo %s", internalPort, SUCCESS_MARKER)},
                 {"/bin/bash", "-c", format("</dev/tcp/localhost/%d && echo %s", internalPort, SUCCESS_MARKER)}
         };

core/src/test/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheckTest.java

@@ -3,19 +3,23 @@
 import com.google.common.collect.ImmutableSet;
 import org.junit.Rule;
 import org.junit.Test;
+import org.testcontainers.containers.BindMode;
 import org.testcontainers.containers.GenericContainer;
 
 import static org.rnorth.visibleassertions.VisibleAssertions.assertThrows;
 import static org.rnorth.visibleassertions.VisibleAssertions.assertTrue;
 
 public class InternalCommandPortListeningCheckTest {
 
+    // Linking a custom configuration into the container so that nginx is listening on port 8080. This is necessary to proof
+    // that the command formatting uses the correct casing for hexadecimal numberd (i.e. 1F90 and not 1f90).
     @Rule
-    public GenericContainer nginx = new GenericContainer<>("nginx:1.9.4");
+    public GenericContainer nginx = new GenericContainer<>("nginx:1.9.4")
+            .withClasspathResourceMapping("nginx_on_8080.conf", "/etc/nginx/conf.d/default.conf", BindMode.READ_ONLY);
 
     @Test
     public void singleListening() {
-        final InternalCommandPortListeningCheck check = new InternalCommandPortListeningCheck(nginx, ImmutableSet.of(80));
+        final InternalCommandPortListeningCheck check = new InternalCommandPortListeningCheck(nginx, ImmutableSet.of(8080));
 
         final Boolean result = check.call();
 
@@ -24,7 +28,7 @@ public void singleListening() {
 
     @Test
     public void nonListening() {
-        final InternalCommandPortListeningCheck check = new InternalCommandPortListeningCheck(nginx, ImmutableSet.of(80, 1234));
+        final InternalCommandPortListeningCheck check = new InternalCommandPortListeningCheck(nginx, ImmutableSet.of(8080, 1234));
 
         assertThrows("InternalCommandPortListeningCheck detects a non-listening port among many",
                 IllegalStateException.class,

core/src/test/resources/nginx_on_8080.conf

@@ -0,0 +1,5 @@
+# This configuration makes Nginx listen on port port 8080
+
+server {
+    listen       8080;
+}