library(testit)

res = mapply(
  auto_out_name,
  c('abc.Rnw', 'abc.rnw', 'abc.rtex', 'abc.Rmd', 'abc.rhtm', 'abc.Rhtml', 'foo.abc.rhtml'),
  USE.NAMES = FALSE
)
assert(
  'auto_out_name() converts .Rfoo to .foo',
  identical(res, c('abc.tex', 'abc.tex', 'abc.tex', 'abc.md', 'abc.htm', 'abc.html', 'foo.abc.html'))
)

res = mapply(
  auto_out_name,
  c('abc.tex', '_knit_abc.tex', '_knit_abc.md', 'foo_knit_.html'),
  USE.NAMES = FALSE
)
assert(
  'auto_out_name() converts .tex/.unknown to .txt, and removes _knit_',
  identical(res, c('abc.txt', 'abc.tex', 'abc.md', 'foo.html')),
  identical(auto_out_name('foo.bar'), 'foo.txt')
)

assert(
  'chunks with include=FALSE should stop on error',
  suppressMessages(
    has_error(knit(text = c('<<include=F>>=', '1+"a"', '@'), quiet = TRUE))
  )
)

assert(
  'tidy=FALSE + eval=numeric should work',
  identical(
    '[1] 1\n[1] 2\n',
    knit(
      text = c('<<tidy=FALSE, eval=1:2, echo=FALSE, results="asis">>=', '1', '1+', '1', '1', '@'),
      quiet = TRUE
    )
  )
)

assert(
  'opts_template options are used',
  identical(
    "\n[1] 2\n",
    knit(
      text = c(
        "<<include=FALSE>>=","opts_template$set(quiet = list(echo=FALSE))", "@",
        "<<results='asis', opts.label='quiet'>>=", "1+1", "@"
      ),
      quiet = TRUE
    )
  )
)

assert(
  'local chunk options override opts_template',
  identical(
    "\n\\begin{kframe}\n\\begin{alltt}\n\\hlnum{1}\\hlopt{+}\\hlnum{1}\n\\end{alltt}\n\\end{kframe}[1] 2\n",
    knit(
      text = c(
        "<<include=FALSE>>=","opts_template$set(quiet = list(echo=FALSE))", "@",
        "<<results='asis', opts.label='quiet', echo=TRUE, tidy=FALSE>>=", "1+1", "@"
      ),
      quiet = TRUE
    )
  )
)

# a shortcut
k = function(text) {
  on.exit(opts_chunk$restore())
  knit(text = c('```{r}', text, '```'), quiet = TRUE, envir = parent.frame())
}
k(c(
  'knit_child(text = "```{r}\nopts_chunk$set(echo=FALSE)\n```", options=list())',
  'x1 = opts_chunk$get("echo")'
))
k(c(
  'knit_child(text = "```{r}\nopts_chunk$set(dpi=200)\n```", options=list(dpi=100))',
  'x2 = opts_chunk$get("dpi")'
))

assert(
  'using knit_child() does not reset global chunk options set in child documents',
  x1 == FALSE, x2 == 200
)

txt = '%\\documentclass{article}
\\documentclass{article}
\\begin{document}
\\Sexpr{pi}
\\end{document}'
res = strsplit(knit(text = txt, quiet = TRUE), '\n')[[1]]

assert(
  'insert_header_latex() finds the correct \\documentclass{}',
  identical(res[1], '%\\documentclass{article}')
)

txt = '\\documentclass{article}
\\begin{document}
\\begin{verbatim}
\\documentclass{article}
\\end{verbatim}
\\Sexpr{pi}
\\end{document}'
res = strsplit(knit(text = txt, quiet = TRUE), '\n')[[1]]

assert(
  'insert_header_latex() finds the correct \\documentclass{}',
  identical(res[length(res) - 3], '\\documentclass{article}')
)

assert('knit_meta_add() adds meta objects with the correct number of labels', {
  knit_meta(clean = TRUE)
  knit_meta_add(list(1, 2))
  m = attr(knit_meta_add(list(3, 4), label = c('a', 'b')), 'knit_meta_id')
  knit_meta(clean = TRUE)
  (m %==% c('', '', 'a', 'b'))
})

local({
  out = NULL
  hnd = function(cnd) out <<- cnd

  on.exit(file.remove('knit-handlers.md'))
  knit('knit-handlers.Rmd', quiet = TRUE)

  assert('knit() passes calling handlers to evaluate()', {
    (inherits(out, 'error'))
  })
})