Finalize specification. Most tests now come with a corresponding prose, only those where the behavior is not finally decided don't have a prose version yet (#88). New tests --------- - Test behavior of methods in presence of placeholders (#120). - Test column name mismatch behavior for appending tables (#93). - Test that `dbBind()` against factor works but raises a warning (#91). - Test roundtrip of alternating empty and non-empty strings (#42). - Test multiple columns of different types in one statement or table (#35). - Test `field.types` argument to `dbWriteTable()` (#12). - Added tests for invalid or closed connection argument to all methods that expect a connection as first argument (#117). - Enabled test that tests a missing `dbDisconnect()`. - Add test for unambiguous escaping of identifiers (r-dbi/RSQLite#123). - Reenable tests for visibility (#89). - Fix and specify 64-bit roundtrip test. - 64-bit integers only need to be coercible to `numeric` and `character` (#74). - Added roundtrip test for time values (#14). - Added tweaks for handling date, time, timestamp, ... (#53, #76). - Test that `dbFetch()` on update-only query returns warning (#66). Adapted tests ------------- - `NULL` is a valid value for the `row.names` argument, same as `FALSE`. - A column named `row_names` receives no special handling (#54). - A warning (not an error anymore) is expected when calling `dbDisconnect()` on a closed or invalid connection. - `row.names = FALSE` is now the default for methods that read or write tables. - Add `NA` to beginning and end of columns in table roundtrip tests (#24). - Stricter tests for confusion of named and unnamed SQL parameters and placeholders (#107). - Also check names of all returned data frames. - The return value for all calls to `dbGetQuery()`, `dbFetch()`, and `dbReadTable()` is now checked for consistency (all columns have the same length, length matches number of rows) (#126). - Removed stress tests that start a new session. - Allow `hms` (or other subclasses of `difftime`) to be returned as time class (#135, @jimhester). - Test that dates are of type `numeric` (#99, @jimhester). - Replace `POSIXlt` by `POSIXct` (#100, @jimhester). - Use `"PST8PDT"` instead of `"PST"` as time zone (#110, @thrasibule). - Added tests for support of `blob` objects (input and output), but backends are not required to return `blob` objects (#98). - The `logical_return`, `date_typed` and `timestamp_typed` tweaks are respected by the bind tests. - Fixed tests involving time comparison; now uses UTC timezone and compares against a `difftime`. - Tests for roundtrip of character values now includes tabs, in addition to many other special characters (#85). - Make sure at least one table exists in the `dbListTables()` test. - Fix roundtrip tests for raw columns: now expecting `NULL` and not `NA` entries for SQL NULL values. - Fix `expect_equal_df()` for list columns. - Testing that a warning is given if the user forgets to call `dbDisconnect()` or `dbClearResult()` (#103). - Numeric roundtrip accepts conversion of `NaN` to `NA` (#79). Internal -------- - Fix R CMD check errors. - Internal consistency checks (#114). - Skip patterns that don't match any of the tests now raise a warning (#84). - New `test_some()` to test individual tests (#136). - Use desc instead of devtools (#40). - All unexpected warnings are now reported as test failures (#113). - `DBItest_tweaks` class gains a `$` method, accessing an undefined tweak now raises an error. - The arguments of the `tweaks()` function now have default values that further describe their intended usage. - New `with_closed_connection()`, `with_invalid_connection()`, `with_result()` and `with_remove_test_table()` helpers, and `expect_visible()`, `expect_inbisible_true()`, and `expect_equal_df()` expectations for more concise tests.

Test for alternating empty and non-empty strings #42

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