Adds check for block verification failures

Tests/CodexTests/BasicTests/ExampleTests.cs

@@ -94,6 +94,8 @@ namespace CodexTests.BasicTests
 
             AssertBalance(contracts, seller, Is.GreaterThan(sellerInitialBalance), "Seller was not paid for storage.");
             AssertBalance(contracts, buyer, Is.LessThan(buyerInitialBalance), "Buyer was not charged for storage.");
+
+            CheckLogForErrors(seller, buyer);
         }
     }
 }

Tests/CodexTests/BasicTests/OneClientTests.cs

@@ -6,7 +6,7 @@ using Utils;
 namespace CodexTests.BasicTests
 {
     [TestFixture]
-    public class OneClientTests : DistTest
+    public class OneClientTests : CodexDistTest
     {
         [Test]
         public void OneClientTest()

Tests/CodexTests/BasicTests/TwoClientTests.cs

@@ -1,12 +1,11 @@
 using CodexPlugin;
-using DistTestCore;
 using NUnit.Framework;
 using Utils;
 
 namespace CodexTests.BasicTests
 {
     [TestFixture]
-    public class TwoClientTests : DistTest
+    public class TwoClientTests : CodexDistTest
     {
         [Test]
         public void TwoClientTest()
@@ -51,6 +50,7 @@ namespace CodexTests.BasicTests
             var downloadedFile = secondary.DownloadContent(contentId);
 
             testFile.AssertIsEqual(downloadedFile);
+            CheckLogForErrors(primary, secondary);
         }
     }
 }

Tests/CodexTests/CodexDistTest.cs

@@ -85,6 +85,19 @@ namespace CodexTests
             AssertHelpers.RetryAssert(constraint, () => contracts.GetTestTokenBalance(codexNode), nameof(AssertBalance) + msg);
         }
 
+        public void CheckLogForErrors(params ICodexNode[] nodes)
+        {
+            foreach (var node in nodes) CheckLogForErrors(node);
+        }
+
+        public void CheckLogForErrors(ICodexNode node)
+        {
+            var log = Ci.DownloadLog(node);
+
+            log.AssertLogDoesNotContain("Block validation failed");
+            log.AssertLogDoesNotContain("ERR ");
+        }
+
         protected virtual void OnCodexSetup(ICodexSetup setup)
         {
         }

Tests/DistTestCore/DownloadedLogExtensions.cs

@@ -9,5 +9,10 @@ namespace DistTestCore
         {
             Assert.That(log.DoesLogContain(expectedString), $"Did not find '{expectedString}' in log.");
         }
+
+        public static void AssertLogDoesNotContain(this IDownloadedLog log, string unexpectedString)
+        {
+            Assert.That(!log.DoesLogContain(unexpectedString), $"Did find '{unexpectedString}' in log.");
+        }
     }
 }