Add example for how the (generally deprecated) bind mount API might b…

…e used.

pom.xml

@@ -24,6 +24,18 @@
             <artifactId>testcontainers</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>postgresql</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.2.23</version>
+            <scope>runtime</scope>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>

src/test/java/org/testcontainers/repro/ReproExampleTest.java

@@ -1,33 +1,79 @@
 package org.testcontainers.repro;
 
+import org.junit.Assert;
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.testcontainers.containers.BindMode;
 import org.testcontainers.containers.GenericContainer;
-import org.testcontainers.utility.DockerImageName;
+import org.testcontainers.containers.PostgreSQLContainer;
 
-public class ReproExampleTest {
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
 
-    private static final Logger LOG = LoggerFactory.getLogger(ReproExampleTest.class);
+public class ReproExampleTest {
 
-    /**
-     * Placeholder for a piece of code that demonstrates the bug. You can use this as a starting point, or replace
-     * entirely.
-     * <p>
-     * Ideally this would be a failing test. If it's excessively difficult to form as a test (e.g. relates to log
-     * output, teardown or other side effects) then it would be sufficient to explain the behaviour in the issue
-     * description.
-     */
     @Test
-    public void demonstration() {
+    public void bindMountLogFiles() throws IOException {
         try (
-            // customize the creation of a container as required
-            GenericContainer<?> container = new GenericContainer<>(DockerImageName.parse("redis:6.0.5"))
-                    .withExposedPorts(6379)
+                GenericContainer<?> container = new GenericContainer<>("nginx:1.19.0-alpine")
+                        .withExposedPorts(80)
+                        .withFileSystemBind(System.getProperty("user.dir") + "/nginx",
+                                "/var/log/nginx", BindMode.READ_WRITE)
         ) {
             container.start();
 
-            // ...
+            // request against existing path
+            performRequestAgainstContainer(container, "/");
+
+            // request against nonsense path
+            long now = System.currentTimeMillis();
+            performRequestAgainstContainer(container, "/foobar/" + now);
+
+            // check that nginx/error.log in the project directory contains the now timestamp
+            String errorLog = System.getProperty("user.dir") + "/nginx/error.log";
+            String errorLogContents = new String(java.nio.file.Files.readAllBytes(java.nio.file.Paths.get(errorLog)));
+            Assert.assertTrue(errorLogContents.contains(Long.toString(now)));
+
         }
+
+    }
+
+    @Test
+    public void postgresContainerWithBootstrapFiles() throws Exception {
+        try (
+                PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:13.1")
+                        .withClasspathResourceMapping("init.sql", "/docker-entrypoint-initdb.d/init.sql", BindMode.READ_WRITE)
+        ) {
+            postgres.start();
+
+            try (
+                    Connection conn = DriverManager.getConnection(postgres.getJdbcUrl(), postgres.getUsername(), postgres.getPassword());
+                    Statement stmt = conn.createStatement();
+                    ResultSet rs = stmt.executeQuery("SELECT * FROM test_table")
+            ) {
+                // count all rows in result set
+                int rowCount = 0;
+                while (rs.next()) {
+                    rowCount++;
+                }
+
+                // assert row count is 3
+                Assert.assertEquals(3, rowCount);
+            }
+        }
+    }
+
+
+
+    private static int performRequestAgainstContainer(GenericContainer<?> container, String path) throws IOException {
+        URL url = new URL("http://" + container.getHost() + ":" + container.getMappedPort(80) + path);
+
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod("GET");
+        return conn.getResponseCode();
     }
 }

src/test/resources/init.sql

@@ -0,0 +1,8 @@
+CREATE TABLE test_table (
+    id SERIAL PRIMARY KEY,
+    data VARCHAR(255) NOT NULL
+);
+
+INSERT INTO test_table (data) VALUES ('Test data 1');
+INSERT INTO test_table (data) VALUES ('Test data 2');
+INSERT INTO test_table (data) VALUES ('Test data 3');