dragosmg commented on a change in pull request #12179:
URL: https://github.com/apache/arrow/pull/12179#discussion_r787565796



##########
File path: r/tests/testthat/_snaps/dplyr-join.md
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@@ -0,0 +1,50 @@
+# Error handling
+
+    Code
+      (expect_error(left_join(arrow_table(example_data), 
arrow_table(example_data),
+      by = "made_up_colname")))
+    Output
+      <error/rlang_error>
+      Join column must be present in data.
+      x `made_up_colname` not present in x.

Review comment:
       Yes, I thought have explicit x/y error bullets might be better. 




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