Improve error when creating domain label lists for non-existent TLDs (#1112)

* Improve error message when creating domain label lists for non-existent TLDs

core/src/main/java/google/registry/model/registry/Registries.java

@@ -106,6 +106,17 @@ public final class Registries {
     return tld;
   }
 
+  /**
+   * Pass-through check that the TLD exists, otherwise throw using the given error format message.
+   *
+   * <p>The specified TLD will be passed to the format message string.
+   */
+  public static String assertTldExists(String tld, String fmtMessage) {
+    String message = String.format(fmtMessage, tld);
+    checkArgument(getTlds().contains(checkArgumentNotNull(emptyToNull(tld), message)), message);
+    return tld;
+  }
+
   /** Pass-through check that every TLD in the given iterable exists, otherwise throw an IAE. */
   public static Iterable<String> assertTldsExist(Iterable<String> tlds) {
     for (String tld : tlds) {

core/src/main/java/google/registry/tools/CreateReservedListCommand.java

@@ -70,7 +70,8 @@ final class CreateReservedListCommand extends CreateOrUpdateReservedListCommand
     checkArgument(nameParts.size() == 2, INVALID_FORMAT_ERROR_MESSAGE);
     String tld = nameParts.get(0);
     if (!tld.equals("common")) {
-      assertTldExists(tld);
+      assertTldExists(
+          tld, "The name must be in the format {tld|common}_list-name, yet TLD %s does not exist");
     }
     checkArgument(nameParts.get(1).matches("[-a-zA-Z0-9]+"), INVALID_FORMAT_ERROR_MESSAGE);
   }

core/src/main/java/google/registry/tools/server/CreateOrUpdatePremiumListAction.java

@@ -15,6 +15,7 @@
 package google.registry.tools.server;
 
 import static com.google.common.flogger.LazyArgs.lazy;
+import static google.registry.util.PreconditionsUtils.checkArgumentNotNull;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.flogger.FluentLogger;
@@ -45,27 +46,29 @@ public abstract class CreateOrUpdatePremiumListAction implements Runnable {
   @Override
   public void run() {
     try {
+      checkArgumentNotNull(inputData, "Input data must not be null");
       save();
     } catch (IllegalArgumentException e) {
       logger.atInfo().withCause(e).log(
           "Usage error in attempting to save premium list from nomulus tool command");
-      response.setPayload(ImmutableMap.of("error", e.toString(), "status", "error"));
+      response.setPayload(ImmutableMap.of("error", e.getMessage(), "status", "error"));
     } catch (Exception e) {
       logger.atSevere().withCause(e).log(
           "Unexpected error saving premium list to Datastore from nomulus tool command");
-      response.setPayload(ImmutableMap.of("error", e.toString(), "status", "error"));
+      response.setPayload(ImmutableMap.of("error", e.getMessage(), "status", "error"));
     }
   }
 
   /** Logs the premium list data at INFO, truncated if too long. */
   void logInputData() {
+    String logData = (inputData == null) ? "(null)" : inputData;
     logger.atInfo().log(
         "Received the following input data: %s",
         lazy(
             () ->
-                (inputData.length() < MAX_LOGGING_PREMIUM_LIST_LENGTH)
-                    ? inputData
-                    : (inputData.substring(0, MAX_LOGGING_PREMIUM_LIST_LENGTH) + "<truncated>")));
+                (logData.length() < MAX_LOGGING_PREMIUM_LIST_LENGTH)
+                    ? logData
+                    : (logData.substring(0, MAX_LOGGING_PREMIUM_LIST_LENGTH) + "<truncated>")));
   }
 
   /** Saves the premium list to both Datastore and Cloud SQL. */

core/src/main/java/google/registry/tools/server/CreatePremiumListAction.java

@@ -51,9 +51,12 @@ public class CreatePremiumListAction extends CreateOrUpdatePremiumListAction {
   @Override
   protected void save() {
     checkArgument(
-        !PremiumListDualDao.exists(name), "A premium list of this name already exists: %s.", name);
+        !PremiumListDualDao.exists(name), "A premium list of this name already exists: %s", name);
     if (!override) {
-      assertTldExists(name);
+      assertTldExists(
+          name,
+          "Premium names must match the name of the TLD they are intended to be used on"
+              + " (unless --override is specified), yet TLD %s does not exist");
     }
     logger.atInfo().log("Saving premium list for TLD %s", name);
     logInputData();

core/src/test/java/google/registry/tools/CreateReservedListCommandTest.java

@@ -113,7 +113,9 @@ class CreateReservedListCommandTest
 
   @Test
   void testNamingRules_tldThatDoesNotExist_failsWithoutOverride() {
-    runNameTestExpectedFailure("footld_reserved-list", "TLD footld does not exist");
+    runNameTestExpectedFailure(
+        "footld_reserved-list",
+        "The name must be in the format {tld|common}_list-name, yet TLD footld does not exist");
   }
 
   @Test
@@ -153,7 +155,9 @@ class CreateReservedListCommandTest
 
   @Test
   void testNamingRules_commonAsListName_failsWithoutOverride() {
-    runNameTestExpectedFailure("invalidtld_common", "TLD invalidtld does not exist");
+    runNameTestExpectedFailure(
+        "invalidtld_common",
+        "The name must be in the format {tld|common}_list-name, yet TLD invalidtld does not exist");
   }
 
   @Test

core/src/test/java/google/registry/tools/server/CreatePremiumListActionTest.java

@@ -70,6 +70,18 @@ public class CreatePremiumListActionTest {
     assertThat(error).contains("A premium list of this name already exists");
   }
 
+  @Test
+  void test_nonExistentTld_fails() {
+    action.name = "zanzibar";
+    action.inputData = "zanzibar,USD 100";
+    action.run();
+    assertThat(response.getResponseMap().get("status")).isEqualTo("error");
+    assertThat(response.getResponseMap().get("error").toString())
+        .isEqualTo(
+            "Premium names must match the name of the TLD they are intended to be used on"
+                + " (unless --override is specified), yet TLD zanzibar does not exist");
+  }
+
   @Test
   void test_nonExistentTld_successWithOverride() {
     action.name = "zanzibar";