Introduce MockSslInfo

Closes gh-35078

spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockSslInfo.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2002-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.mock.http.server.reactive;
+
+import java.security.cert.X509Certificate;
+
+import org.jspecify.annotations.Nullable;
+
+import org.springframework.core.style.DefaultToStringStyler;
+import org.springframework.core.style.SimpleValueStyler;
+import org.springframework.core.style.ToStringCreator;
+import org.springframework.http.server.reactive.SslInfo;
+
+/**
+ * Mock implementation of {@link SslInfo} for use in tests without an actual server.
+ *
+ * @author Sam Brannen
+ * @since 7.0
+ */
+public class MockSslInfo implements SslInfo {
+
+	private @Nullable String sessionId;
+
+	private X509Certificate @Nullable [] peerCertificates;
+
+
+	/**
+	 * Construct {@code MockSslInfo} without a session ID or certificates.
+	 */
+	public MockSslInfo() {
+	}
+
+	/**
+	 * Construct {@code MockSslInfo} with a session ID.
+	 */
+	public MockSslInfo(String sessionId) {
+		this.sessionId = sessionId;
+	}
+
+	/**
+	 * Construct {@code MockSslInfo} with a session ID and certificates.
+	 */
+	public MockSslInfo(String sessionId, X509Certificate[] peerCertificates) {
+		this.sessionId = sessionId;
+		this.peerCertificates = peerCertificates;
+	}
+
+
+	/**
+	 * Set the SSL session ID.
+	 */
+	public void setSessionId(String sessionId) {
+		this.sessionId = sessionId;
+	}
+
+	@Override
+	public @Nullable String getSessionId() {
+		return this.sessionId;
+	}
+
+	/**
+	 * Set the SSL certificates associated with the request.
+	 */
+	public void setPeerCertificates(X509Certificate[] peerCertificates) {
+		this.peerCertificates = peerCertificates;
+	}
+
+	@Override
+	public X509Certificate @Nullable [] getPeerCertificates() {
+		return this.peerCertificates;
+	}
+
+	@Override
+	public String toString() {
+		return new ToStringCreator(this, new DefaultToStringStyler(new SimpleValueStyler()))
+				.append("sessionId", this.sessionId)
+				.append("peerCertificates", this.peerCertificates)
+				.toString();
+	}
+
+}