Add Support ServerGenerateOneTimeTokenRequestResolver

Closes gh-16488

Signed-off-by: Max Batischev <mblancer@mail.ru>

web/src/test/java/org/springframework/security/web/server/authentication/ott/DefaultServerGenerateOneTimeTokenRequestResolverTests.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2002-2025 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.security.web.server.authentication.ott;
+
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.http.MediaType;
+import org.springframework.mock.http.server.reactive.MockServerHttpRequest;
+import org.springframework.mock.web.server.MockServerWebExchange;
+import org.springframework.security.authentication.ott.GenerateOneTimeTokenRequest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link DefaultServerGenerateOneTimeTokenRequestResolver}
+ *
+ * @author Max Batischev
+ */
+public class DefaultServerGenerateOneTimeTokenRequestResolverTests {
+
+	private final DefaultServerGenerateOneTimeTokenRequestResolver resolver = new DefaultServerGenerateOneTimeTokenRequestResolver();
+
+	@Test
+	void resolveWhenUsernameParameterIsPresentThenResolvesGenerateRequest() {
+		MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.post("/ott/generate")
+			.contentType(MediaType.APPLICATION_FORM_URLENCODED)
+			.body("username=user"));
+
+		GenerateOneTimeTokenRequest request = this.resolver.resolve(exchange).block();
+
+		assertThat(request).isNotNull();
+		assertThat(request.getUsername()).isEqualTo("user");
+		assertThat(request.getExpiresIn()).isEqualTo(Duration.ofMinutes(5));
+	}
+
+	@Test
+	void resolveWhenUsernameParameterIsNotPresentThenNull() {
+		MockServerWebExchange exchange = MockServerWebExchange
+			.from(MockServerHttpRequest.post("/ott/generate").contentType(MediaType.APPLICATION_FORM_URLENCODED));
+
+		GenerateOneTimeTokenRequest request = this.resolver.resolve(exchange).block();
+
+		assertThat(request).isNull();
+	}
+
+	@Test
+	void resolveWhenExpiresInSetThenResolvesGenerateRequest() {
+		MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.post("/ott/generate")
+			.contentType(MediaType.APPLICATION_FORM_URLENCODED)
+			.body("username=user"));
+		this.resolver.setExpiresIn(Duration.ofSeconds(600));
+
+		GenerateOneTimeTokenRequest generateRequest = this.resolver.resolve(exchange).block();
+
+		assertThat(generateRequest.getExpiresIn()).isEqualTo(Duration.ofSeconds(600));
+	}
+
+}