thisisnic commented on a change in pull request #11432:
URL: https://github.com/apache/arrow/pull/11432#discussion_r732818699
##########
File path: r/tests/testthat/test-csv.R
##########
@@ -266,6 +266,27 @@ test_that("Mix of guessing and declaring types", {
expect_identical(df, tbl[, c("dbl", "false", "chr")])
})
+test_that("more informative error when reading a CSV with headers and schema",
{
+ tf <- tempfile()
+ on.exit(unlink(tf))
+
+ write.csv(example_data, tf, row.names = FALSE)
+
+ share_schema <- schema(
+ int = int32(),
+ dbl = float64(),
+ dbl2 = float64(),
+ lgl = boolean(),
+ false = boolean(),
+ chr = utf8(),
+ fct = utf8()
+ )
+
+ expect_error(
+ read_csv_arrow(tf, schema = share_schema),
+ "header row"
Review comment:
```suggestion
"If you have supplied a schema and your data contains a header row, you
should supply the argument `skip = 1` to prevent the header being read in as
data."
```
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