test_that("Table width correctly output in LaTeX", {

  gt_latex_width_1 <-
    gt(exibble) %>%
    tab_options(table.width = pct(90)) %>%
    as_latex()

  start_pt <- regexpr("begin\\{longtable", gt_latex_width_1)

  expect_gt(start_pt, 0)  # Verifies the long table command appears in the text

  end_pt <- regexpr("end\\{longtable", gt_latex_width_1)

  expect_gt(end_pt, 0)

  latex_prefix <- substr(gt_latex_width_1, 1L, start_pt)

  # Verify that LTleft and LTright are correctly specified
  expect_match(latex_prefix, "\\\\setlength\\\\LTleft\\{0.05\\\\linewidth\\}")

  expect_match(latex_prefix, "\\\\setlength\\\\LTright\\{0.05\\\\linewidth\\}")

  # Test specification of a table width in pixels
  gt_latex_width_2 <-
    gt(exibble) %>%
    tab_options(table.width = '600px') %>%
    as_latex()

  expect_match(gt_latex_width_2, "\\\\setlength\\\\LTleft\\{\\\\dimexpr\\(0.5\\\\linewidth - 225pt\\)\\}")

  expect_match(gt_latex_width_2, "\\\\setlength\\\\LTright\\{\\\\dimexpr\\(0.5\\\\linewidth - 225pt\\)\\}")

})

test_that("Table styles correctly applied", {

  gt_latex_styled <-
    gt(exibble[1:5, c(1:3, 5:9)],
     rowname_col = 'row',
     groupname_col = 'group') %>%
    tab_stubhead(label = 'stubhead') %>%
    tab_stub_indent(rows = everything(),
                    indent = 'increase') %>%
    tab_spanner(label = 'heading',
                id = 'a1',
                columns = 1:3) %>%
    tab_spanner(label = 'heading',
                id = 'b2',
                columns = 5:6) %>%
    summary_rows(fns = list(list(label = 'Total', fn = 'sum'),
                            list(label = 'Avg', fn = 'mean')),
                 columns = c('num', 'currency'),
                 groups = 'grp_a',
                 fmt = ~ fmt_number(., use_seps = TRUE)) %>%
    grand_summary_rows(fns =list(list(label = 'grand total', fn = 'sum')),
                       columns = c('num', 'currency'),
                       fmt = ~ fmt_number(., use_seps = TRUE)) %>%
    tab_footnote(footnote = "This is a footnote. With a second line.",
                 locations = cells_body(columns = 'time', rows = 3L)) %>%
    tab_footnote(footnote = "This is a footnote in the column labels.",
                 locations = cells_column_labels(columns = 'fctr')) %>%
    tab_source_note(source_note = 'NOTES:  A mtcars example.') %>%
    # Table formatting with tab_style
    tab_style(style = cell_text(decorate = 'overline'),
              locations = cells_stubhead()) %>%
    tab_style(style = cell_text(transform = 'uppercase'),
              locations = cells_column_labels(columns = c('num', 'fctr', 'datetime'))) %>%
    tab_style(style = gt::cell_text(style = 'italic'),
              locations = cells_column_spanners(spanners = 'a1')) %>%

    # Body styles
    tab_style(style = cell_text(size = 20,
                                decorate = 'underline',
                                color = 'red'),
              locations = cells_body(columns = 'time',
                                     rows = c(3:4))) %>%
    tab_style(style = cell_text(indent = px(20),
                                weight = 'bold'),
              locations = cells_body(columns = 'char',
                                     rows = c(2L, 4L, 5L))) %>%
    tab_style(style = cell_text(indent = px(15),
                                style = 'oblique'),
              locations = cells_stub(rows = c(2L, 4L, 5L))) %>%
    tab_style(style = cell_text(size = 20L,
                                color = '#0000FF'),
              locations = cells_body(columns = 'fctr')) %>%
    tab_style(style = list(cell_text(weight = 'bold'),
                           cell_fill(color = '#CCCCFF')),
              locations = cells_row_groups(groups = 'grp_b')) %>%
    tab_style(style = cell_text(size = 'x-small'),
              locations = cells_body(columns = 'datetime')) %>%
    tab_style(style = list(cell_text(color = '#FFFFFF'),
                           cell_fill(color = '#AA0000')),
              locations = cells_stub()) %>%
    # Footnoe and source note styles
    tab_style(style = cell_text(size = 8,
                                style = 'italic'),
              locations = cells_source_notes()) %>%
    tab_style(style = cell_text(weight = 'bold'),
              locations = cells_footnotes()) %>%

    # Summary styles
    tab_style(style = cell_fill(color = '#00FF00'),
              locations = cells_summary(groups = 'grp_a',
                                        columns = c('num', 'currency'),
                                        rows = 2L)) %>%
    tab_style(style = cell_text(color = '#00FF00'),
              locations = cells_stub_summary(groups = 'grp_a',
                                             rows = 1L)) %>%

    # Grand summary styles
    tab_style(style = cell_text(transform = 'capitalize',
                                weight = 'bold'),
              locations = cells_stub_grand_summary()) %>%
    tab_style(style = cell_fill(color = '#AAAAAA'),
              locations = cells_grand_summary()) %>%
    as_latex() %>%
    expect_snapshot()

})