Import CSV 3.0.8

This includes performance improvements and backward incompatibility
fixes.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67560 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/csv/interface/test_write.rb

@@ -0,0 +1,174 @@
+# frozen_string_literal: false
+
+require_relative "../helper"
+
+class TestCSVInterfaceWrite < Test::Unit::TestCase
+  extend DifferentOFS
+
+  def setup
+    super
+    @output = Tempfile.new(["interface-write", ".csv"])
+  end
+
+  def teardown
+    @output.close(true)
+    super
+  end
+
+  def test_generate_default
+    csv_text = CSV.generate do |csv|
+      csv << [1, 2, 3] << [4, nil, 5]
+    end
+    assert_equal(<<-CSV, csv_text)
+1,2,3
+4,,5
+    CSV
+  end
+
+  def test_generate_append
+    csv_text = <<-CSV
+1,2,3
+4,,5
+    CSV
+    CSV.generate(csv_text) do |csv|
+      csv << ["last", %Q{"row"}]
+    end
+    assert_equal(<<-CSV, csv_text)
+1,2,3
+4,,5
+last,"""row"""
+    CSV
+  end
+
+  def test_generate_no_new_line
+    csv_text = CSV.generate("test") do |csv|
+      csv << ["row"]
+    end
+    assert_equal(<<-CSV, csv_text)
+testrow
+    CSV
+  end
+
+  def test_generate_line_col_sep
+    line = CSV.generate_line(["1", "2", "3"], col_sep: ";")
+    assert_equal(<<-LINE, line)
+1;2;3
+    LINE
+  end
+
+  def test_generate_line_row_sep
+    line = CSV.generate_line(["1", "2"], row_sep: nil)
+    assert_equal(<<-LINE.chomp, line)
+1,2
+    LINE
+  end
+
+  def test_generate_line_shortcut
+    line = ["1", "2", "3"].to_csv(col_sep: ";")
+    assert_equal(<<-LINE, line)
+1;2;3
+    LINE
+  end
+
+  def test_headers_detection
+    headers = ["a", "b", "c"]
+    CSV.open(@output.path, "w", headers: true) do |csv|
+      csv << headers
+      csv << ["1", "2", "3"]
+      assert_equal(headers, csv.headers)
+    end
+  end
+
+  def test_lineno
+    CSV.open(@output.path, "w") do |csv|
+      n_lines = 20
+      n_lines.times do
+        csv << ["a", "b", "c"]
+      end
+      assert_equal(n_lines, csv.lineno)
+    end
+  end
+
+  def test_append_row
+    CSV.open(@output.path, "wb") do |csv|
+      csv <<
+        CSV::Row.new([], ["1", "2", "3"]) <<
+        CSV::Row.new([], ["a", "b", "c"])
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+1,2,3
+a,b,c
+    CSV
+  end
+
+  def test_append_hash
+    CSV.open(@output.path, "wb", headers: true) do |csv|
+      csv << [:a, :b, :c]
+      csv << {a: 1, b: 2, c: 3}
+      csv << {a: 4, b: 5, c: 6}
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+a,b,c
+1,2,3
+4,5,6
+    CSV
+  end
+
+  def test_append_hash_headers_array
+    CSV.open(@output.path, "wb", headers: [:b, :a, :c]) do |csv|
+      csv << {a: 1, b: 2, c: 3}
+      csv << {a: 4, b: 5, c: 6}
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+2,1,3
+5,4,6
+    CSV
+  end
+
+  def test_append_hash_headers_string
+    CSV.open(@output.path, "wb", headers: "b|a|c", col_sep: "|") do |csv|
+      csv << {"a" => 1, "b" => 2, "c" => 3}
+      csv << {"a" => 4, "b" => 5, "c" => 6}
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+2|1|3
+5|4|6
+    CSV
+  end
+
+  def test_write_headers
+    CSV.open(@output.path,
+             "wb",
+             headers:       "b|a|c",
+             write_headers: true,
+             col_sep:       "|" ) do |csv|
+      csv << {"a" => 1, "b" => 2, "c" => 3}
+      csv << {"a" => 4, "b" => 5, "c" => 6}
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+b|a|c
+2|1|3
+5|4|6
+    CSV
+  end
+
+  def test_write_headers_empty
+    CSV.open(@output.path,
+             "wb",
+             headers:       "b|a|c",
+             write_headers: true,
+             col_sep:       "|" ) do |csv|
+    end
+    assert_equal(<<-CSV, File.read(@output.path, mode: "rb"))
+b|a|c
+    CSV
+  end
+
+  def test_options_not_modified
+    options = {}.freeze
+    CSV.generate(options) {}
+    CSV.generate_line([], options)
+    CSV.filter("", "", options)
+    CSV.instance("", options)
+  end
+end