Consider Vault base path in VaultClients

VaultClients.toBaseUri(…) now properly renders endpoints considering the path segment from VaultEndpoint.

Resolves: gh-413.

spring-vault-core/src/main/java/org/springframework/vault/client/VaultClients.java

@@ -207,8 +207,9 @@ public class VaultClients {
 	}
 
 	private static String toBaseUri(VaultEndpoint endpoint) {
-		return endpoint.getScheme() + "://" + endpoint.getHost() + ":"
-				+ endpoint.getPort() + "/v1";
+
+		return String.format("%s://%s:%s/%s", endpoint.getScheme(), endpoint.getHost(),
+				endpoint.getPort(), endpoint.getPath());
 	}
 
 	/**

spring-vault-core/src/test/java/org/springframework/vault/client/VaultClientsUnitTests.java

@@ -81,4 +81,17 @@ public class VaultClientsUnitTests {
 		assertThat(uri).hasScheme("https").hasHost("foo").hasPort(-1)
 				.hasPath("/path/bar");
 	}
+
+	@Test
+	public void shouldApplyBasepath() {
+
+		VaultEndpoint localhost = VaultEndpoint.create("localhost", 8200);
+		localhost.setPath("foo/v1");
+		PrefixAwareUriTemplateHandler handler = new PrefixAwareUriTemplateHandler(
+				() -> localhost);
+
+		URI uri = handler.expand("/path/{bar}", "bar");
+
+		assertThat(uri).hasHost("localhost").hasPort(8200).hasPath("/foo/v1/path/bar");
+	}
 }