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require "spec"
require "csv"
private def new_csv(headers = false, strip = false)
CSV.new %(one, two\n1, 2\n3, 4\n5), headers: headers, strip: strip
end
describe CSV do
it "gets headers" do
csv = new_csv headers: true
csv.headers.should eq(%w(one two))
end
it "works without headers" do
csv = CSV.new("", headers: true)
csv.headers.should be_empty
end
it "raises if trying to access before first row" do
csv = new_csv headers: true
expect_raises(CSV::Error, "Before first row") do
csv["one"]
end
end
it "gets row values with string" do
csv = new_csv headers: true
csv.next.should be_true
csv["one"].should eq("1")
csv["two"].should eq(" 2")
expect_raises(KeyError) { csv["three"] }
csv["one"]?.should eq("1")
csv["three"]?.should be_nil
csv.next.should be_true
csv["one"].should eq("3")
csv.next.should be_true
csv["one"].should eq("5")
csv["two"].should eq("")
csv.next.should be_false
expect_raises(CSV::Error, "After last row") do
csv["one"]
end
end
it "gets row values with integer" do
csv = new_csv headers: true
csv.next.should be_true
csv[0].should eq("1")
csv[1].should eq(" 2")
expect_raises(IndexError) do
csv[2]
end
csv[-1].should eq(" 2")
csv[-2].should eq("1")
csv.next
csv.next
csv[0].should eq("5")
csv[1].should eq("")
csv[-2].should eq("5")
csv[-1].should eq("")
end
it "gets row values with regex" do
csv = new_csv headers: true
csv.next.should be_true
csv[/on/].should eq("1")
csv[/tw/].should eq(" 2")
expect_raises(KeyError) do
csv[/foo/]
end
end
it "gets current row" do
csv = new_csv headers: true
csv.next.should be_true
row = csv.row
row["one"].should eq("1")
row[1].should eq(" 2")
row[/on/].should eq("1")
row.size.should eq(2)
row.to_a.should eq(["1", " 2"])
row.to_h.should eq({"one" => "1", "two" => " 2"})
end
it "strips" do
csv = new_csv headers: true, strip: true
csv.next.should be_true
csv["one"].should eq("1")
csv["two"].should eq("2")
csv.row.to_a.should eq(%w(1 2))
csv.row.to_h.should eq({"one" => "1", "two" => "2"})
end
it "works without headers" do
csv = new_csv headers: false
csv.next.should be_true
csv[0].should eq("one")
end
it "can do each" do
csv = new_csv headers: true
csv.each do
csv["one"].should eq("1")
break
end.should be_nil
end
it "can do new with block" do
CSV.new(%(one, two\n1, 2\n3, 4\n5), headers: true, strip: true) do |csv|
csv["one"].should eq("1")
csv["two"].should eq("2")
break
end
end
it "returns a Tuple(String, String) for current row with indices" do
CSV.new("John,20\nPeter,30") do |csv|
csv.values_at(0, -1).should eq({"John", "20"})
break
end
end
it "returns a Tuple(String, String) for current row with headers" do
CSV.new("Name,Age\nJohn,20\nPeter,30", headers: true) do |csv|
csv.values_at("Name", "Age").should eq({"John", "20"})
break
end
end
it "returns a Tuple(String, String) for this row with indices" do
CSV.new("John,20\nPeter,30") do |csv|
csv.row.values_at(0, -1).should eq({"John", "20"})
break
end
end
it "returns a Tuple(String, String) for this row with headers" do
CSV.new("Name,Age\nJohn,20\nPeter,30", headers: true) do |csv|
csv.row.values_at("Name", "Age").should eq({"John", "20"})
break
end
end
describe "rewind" do
describe "string based" do
it "without headers" do
csv = CSV.new("one,two\nthree,four", headers: false)
csv.next
csv.row.to_a.should eq(%w(one two))
csv.next
csv.row.to_a.should eq(%w(three four))
csv.rewind
csv.next
csv.row.to_a.should eq(%w(one two))
end
it "with headers" do
csv = CSV.new("one,two\nthree,four\nfive,six", headers: true)
csv.next
csv.row.to_h.should eq({"one" => "three", "two" => "four"})
csv.next
csv.row.to_h.should eq({"one" => "five", "two" => "six"})
csv.rewind
csv.next
csv.row.to_h.should eq({"one" => "three", "two" => "four"})
end
end
describe "IO based" do
it "without headers" do
csv = CSV.new(IO::Memory.new("one,two\nthree,four"), headers: false)
csv.next
csv.row.to_a.should eq(%w(one two))
csv.next
csv.row.to_a.should eq(%w(three four))
csv.rewind
csv.next
csv.row.to_a.should eq(%w(one two))
end
it "with headers" do
csv = CSV.new(IO::Memory.new("one,two\nthree,four\nfive,six"), headers: true)
csv.next
csv.row.to_h.should eq({"one" => "three", "two" => "four"})
csv.next
csv.row.to_h.should eq({"one" => "five", "two" => "six"})
csv.rewind
csv.next
csv.row.to_h.should eq({"one" => "three", "two" => "four"})
end
end
end
end
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