Add tests for OAuth 2.0 Device Authorization Grant

This commit adds tests for the following components:
* AuthenticationConverters
* AuthenticationProviders
* Endpoint Filters

Issue spring-projectsgh-44
Issue spring-projectsgh-1127

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2MetadataConsumers.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2020-2023 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.oauth2.server.authorization.authentication;
+
+import java.util.Map;
+import java.util.function.Consumer;
+
+import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
+
+/**
+ * @author Steve Riesenberg
+ */
+public final class OAuth2MetadataConsumers {
+	private OAuth2MetadataConsumers() {
+	}
+
+	public static Consumer<Map<String, Object>> accessGranted() {
+		return withTrueValue(OAuth2Authorization.Token.ACCESS_GRANTED_METADATA_NAME);
+	}
+
+	public static Consumer<Map<String, Object>> accessDenied() {
+		return withTrueValue(OAuth2Authorization.Token.ACCESS_DENIED_METADATA_NAME);
+	}
+
+	public static Consumer<Map<String, Object>> invalidated() {
+		return withTrueValue(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME);
+	}
+
+	private static Consumer<Map<String, Object>> withTrueValue(String key) {
+		return (metadata) -> metadata.put(key, true);
+	}
+}

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2TokenMetadataExtractors.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2020-2023 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.oauth2.server.authorization.authentication;
+
+import java.util.function.Function;
+
+import org.springframework.security.oauth2.core.OAuth2Token;
+import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
+
+/**
+ * @author Steve Riesenberg
+ */
+public final class OAuth2TokenMetadataExtractors {
+	private OAuth2TokenMetadataExtractors() {
+	}
+
+	public static Function<OAuth2Authorization.Token<? extends OAuth2Token>, Boolean> accessGranted() {
+		return extractBooleanValue(OAuth2Authorization.Token.ACCESS_GRANTED_METADATA_NAME);
+	}
+
+	public static Function<OAuth2Authorization.Token<? extends OAuth2Token>, Boolean> accessDenied() {
+		return extractBooleanValue(OAuth2Authorization.Token.ACCESS_DENIED_METADATA_NAME);
+	}
+
+	public static Function<OAuth2Authorization.Token<? extends OAuth2Token>, Boolean> invalidated() {
+		return extractBooleanValue(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME);
+	}
+
+	private static Function<OAuth2Authorization.Token<? extends OAuth2Token>, Boolean> extractBooleanValue(String key) {
+		return (token) -> token.getMetadata(key);
+	}
+}