test: normalize collation errors (vitessio#10842)

Signed-off-by: Manan Gupta <[email protected]>

Co-authored-by: Manan Gupta <[email protected]>

go/mysql/collations/integration/coercion_test.go

@@ -202,7 +202,7 @@ func TestComparisonSemantics(t *testing.T) {
 							t.Errorf("expected %s vs %s to fail coercion: %v", collA.Collation.Name(), collB.Collation.Name(), errRemote)
 							continue
 						}
-						if !strings.HasPrefix(errRemote.Error(), errLocal.Error()) {
+						if !strings.HasPrefix(normalizeCollationInError(errRemote.Error()), normalizeCollationInError(errLocal.Error())) {
 							t.Fatalf("bad error message: expected %q, got %q", errRemote, errLocal)
 						}
 						continue
@@ -225,3 +225,13 @@ func TestComparisonSemantics(t *testing.T) {
 		})
 	}
 }
+
+// normalizeCollationInError normalizes the collation name in the error output.
+// Starting with mysql 8.0.30 collations prefixed with `utf8_` have been changed to use `utf8mb3_` instead
+// This is inconsistent with older MySQL versions and causes the tests to fail against it.
+// As a stop-gap solution, this functions normalizes the error messages so that the tests pass until we
+// have a fix for it.
+// TODO: Remove error normalization
+func normalizeCollationInError(errMessage string) string {
+	return strings.ReplaceAll(errMessage, "utf8_", "utf8mb3_")
+}