Consider configured meta attributes in VaultTokenRequestBuilder.

Closes gh-80.

spring-vault-core/src/main/java/org/springframework/vault/support/VaultTokenRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 the original author or authors.
+ * Copyright 2016-2017 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.
@@ -28,7 +28,7 @@ import org.springframework.util.Assert;
 
 /**
  * Value object to bind Vault HTTP Token API requests.
- * 
+ *
  * @author Mark Paluch
  */
 public class VaultTokenRequest {
@@ -418,14 +418,14 @@ public class VaultTokenRequest {
 						this.policies));
 
 			}
-			Map<String, String> meta = null;
+			Map<String, String> meta;
 			switch (this.meta.size()) {
 			case 0:
 				meta = Collections.emptyMap();
 				break;
 			default:
 				meta = Collections
-						.unmodifiableMap(new LinkedHashMap<String, String>(meta));
+						.unmodifiableMap(new LinkedHashMap<String, String>(this.meta));
 			}
 
 			return new VaultTokenRequest(id, policies, meta, noParent, noDefaultPolicy,

spring-vault-core/src/test/java/org/springframework/vault/support/VaultTokenRequestUnitTests.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 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
+ *
+ *      http://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.vault.support;
+
+import java.util.Collections;
+
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Unit tests for {@link VaultTokenRequest}.
+ *
+ * @author Mark Paluch
+ */
+public class VaultTokenRequestUnitTests {
+
+	@Test
+	public void shouldBuildEmptyRequest() {
+
+		VaultTokenRequest tokenRequest = VaultTokenRequest.builder().build();
+
+		assertThat(tokenRequest.getMeta()).isEmpty();
+		assertThat(tokenRequest.getPolicies()).isEmpty();
+	}
+
+	@Test
+	public void shouldBuildRequestWithMeta() {
+
+		VaultTokenRequest tokenRequest = VaultTokenRequest.builder()
+				.meta(Collections.singletonMap("key", "value")).build();
+
+		assertThat(tokenRequest.getMeta()).containsEntry("key", "value");
+	}
+
+	@Test
+	public void shouldBuildRequestWithPolicies() {
+
+		VaultTokenRequest tokenRequest = VaultTokenRequest.builder().withPolicy("foo")
+				.build();
+
+		assertThat(tokenRequest.getPolicies()).containsOnly("foo");
+	}
+}