adding a test for the PreAuthenticationAutoConfigurationTest class

gateway/src/test/java/org/georchestra/gateway/autoconfigure/security/PreAuthenticationAutoConfigurationTest.java

@@ -0,0 +1,29 @@
+package org.georchestra.gateway.autoconfigure.security;
+
+import org.georchestra.gateway.security.preauth.ResolveHttpHeadersGeorchestraUserFilter;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class PreAuthenticationAutoConfigurationTest {
+    private ApplicationContextRunner runner = new ApplicationContextRunner()
+            .withConfiguration(AutoConfigurations.of(PreAuthenticationAutoConfiguration.class));
+
+    public @Test void resolveHttpHeadersGeorchestraUserFilterIsAvailable() {
+        runner.withPropertyValues(""//
+                , "georchestra.gateway.headerAuthentication: true" //
+        ).run(context -> {
+            assertThat(context).hasNotFailed().hasSingleBean(ResolveHttpHeadersGeorchestraUserFilter.class);
+        });
+    }
+
+    public @Test void resolveHttpHeadersGeorchestraUserFilterIsUnavailable() {
+        runner.withPropertyValues(""//
+                , "georchestra.gateway.headerAuthentication: false" //
+        ).run(context -> {
+            assertThat(context).hasNotFailed().doesNotHaveBean(ResolveHttpHeadersGeorchestraUserFilter.class);
+        });
+    }
+}