Index: trunk/test/unit/org/openstreetmap/josm/gui/layer/geoimage/WikimediaCommonsLoaderTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/layer/geoimage/WikimediaCommonsLoaderTest.java	(revision 17880)
+++ trunk/test/unit/org/openstreetmap/josm/gui/layer/geoimage/WikimediaCommonsLoaderTest.java	(revision 17880)
@@ -0,0 +1,74 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.gui.layer.geoimage;
+
+import com.github.tomakehurst.wiremock.WireMockServer;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import org.jetbrains.annotations.NotNull;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+import org.openstreetmap.josm.data.Bounds;
+import org.openstreetmap.josm.testutils.JOSMTestRules;
+
+import java.net.URL;
+import java.util.List;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Unit test of {@link WikimediaCommonsLoader}
+ */
+class WikimediaCommonsLoaderTest {
+
+    /**
+     * Setup test.
+     */
+    @RegisterExtension
+    @SuppressFBWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
+    public JOSMTestRules test = new JOSMTestRules().preferences();
+
+    /**
+     * Unit test of {@link WikimediaCommonsLoader}
+     *
+     * @throws Exception if an error occurs
+     */
+    @Test
+    void test() throws Exception {
+        WireMockServer wireMock = mockHttp();
+        wireMock.start();
+
+        WikimediaCommonsLoader loader = new WikimediaCommonsLoader(new Bounds(47., 11., 48., 12.));
+        loader.apiUrl = wireMock.url("/w/api.php");
+        loader.realRun();
+        wireMock.stop();
+
+        List<ImageEntry> images = loader.layer.getImages();
+        assertEquals(1, images.size());
+        ImageEntry image = images.get(0);
+        assertEquals("File:ISS053-E-105875_-_View_of_Earth.jpg", image.getDisplayName());
+        assertEquals(new URL("https://upload.wikimedia.org/wikipedia/commons/e/e8/ISS053-E-105875_-_View_of_Earth.jpg"),
+                image.getImageUrl());
+        image.read(null); // load the image from commons.wikimedia.org
+    }
+
+    @NotNull
+    private WireMockServer mockHttp() {
+        String xml = "" +
+                "<api batchcomplete=\"\">\n" +
+                "<query>\n" +
+                "<geosearch>\n" +
+                "<gs pageid=\"102860206\" ns=\"6\" title=\"File:ISS053-E-105875 - View of Earth.jpg\" lat=\"47.2\" lon=\"11.3\" " +
+                "dist=\"0\" primary=\"\" type=\"camera\"/>\n" +
+                "</geosearch>\n" +
+                "</query>\n" +
+                "</api>";
+        final WireMockServer wireMock = new WireMockServer(options().dynamicPort());
+        wireMock.stubFor(get(urlEqualTo("/w/api.php?format=xml&action=query&list=geosearch" +
+                "&gsnamespace=6&gslimit=500&gsprop=type|name&gsbbox=48.0|11.0|47.0|12.0"))
+                .willReturn(aResponse().withBody(xml)));
+        return wireMock;
+    }
+}