Convert image to PDF (#5)

lib/tesseract_ocr/pdf.ex

@@ -0,0 +1,24 @@
+defmodule TesseractOcr.PDF do
+  @moduledoc """
+  Documentation for TesseractOcr.PDF.
+  """
+
+  import TesseractOcr.Utils
+
+  @doc """
+  This function reads the words on image by OCR and returns the pdf's file's path
+
+  ## Examples
+
+      iex> TesseractOcr.PDF.read("test/resources/world.png", "/tmp/test")
+      "/tmp/test.pdf"
+
+  """
+  def read(path, output, options \\ %{}) when is_binary(path) do
+    options = Map.merge(options, %{c: "tessedit_create_pdf=1"})
+
+    command(path, output, options)
+
+    "#{output}.pdf"
+  end
+end

test/tesseract_ocr/pdf_test.exs

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+defmodule TesseractOcr.PDFTest do
+  use ExUnit.Case
+  doctest TesseractOcr.PDF
+
+  test "read image and saves on a PDF" do
+    pdf_path = TesseractOcr.PDF.read("test/resources/world.png", "test/test", %{lang: "eng", psm: 7, oem: 1})
+
+    assert pdf_path === "test/test.pdf"
+    File.rm(pdf_path)
+  end
+end