DynamicCodec emits a trail of type names when it encounters NoSuchCodecException.

This will make it easier to trace down missing codecs.

PiperOrigin-RevId: 191920743

1 files changed, 31 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/serialization/DynamicCodecTest.java b/src/test/java/com/google/devtools/build/lib/skyframe/serialization/DynamicCodecTest.java
index 7d48929ee9..1d73f6c386 100644
--- a/src/test/java/com/google/devtools/build/lib/skyframe/serialization/DynamicCodecTest.java
+++ b/src/test/java/com/google/devtools/build/lib/skyframe/serialization/DynamicCodecTest.java
@@ -15,8 +15,11 @@
 package com.google.devtools.build.lib.skyframe.serialization;
 
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.fail;
 
+import com.google.common.collect.ImmutableMap;
 import com.google.devtools.build.lib.skyframe.serialization.testutils.SerializationTester;
+import java.io.BufferedInputStream;
 import java.util.Arrays;
 import java.util.Objects;
 import org.junit.Test;
@@ -371,4 +374,32 @@ public final class DynamicCodecTest {
         .setRepetitions(100000)
         .runTests();
   }
+
+  private static class NoCodecExample2 {
+    @SuppressWarnings("unused")
+    private final BufferedInputStream noCodec = new BufferedInputStream(null);
+  }
+
+  private static class NoCodecExample1 {
+    @SuppressWarnings("unused")
+    private final NoCodecExample2 noCodec = new NoCodecExample2();
+  }
+
+  @Test
+  public void testNoCodecExample() throws Exception {
+    ObjectCodecs codecs = new ObjectCodecs(AutoRegistry.get(), ImmutableMap.of());
+    try {
+      codecs.serializeMemoized(new NoCodecExample1());
+      fail();
+    } catch (SerializationException.NoCodecException expected) {
+      assertThat(expected)
+          .hasMessageThat()
+          .contains(
+              "java.io.BufferedInputStream ["
+                  + "com.google.devtools.build.lib.skyframe.serialization."
+                  + "DynamicCodecTest$NoCodecExample2, "
+                  + "com.google.devtools.build.lib.skyframe.serialization."
+                  + "DynamicCodecTest$NoCodecExample1]");
+    }
+  }
 }