Add test for pumpIterator

This commit is contained in:
Paul Campbell 2021-12-30 07:43:17 +00:00
parent cc351d68ba
commit d260ea1627

View file

@ -27,7 +27,11 @@ const maxLineLength = 4096;
fn dumpInput(in: fs.File, out: fs.File, allocator: mem.Allocator) !void {
const writer = out.writer();
const reader = in.reader();
var it = lineIterator(reader, allocator);
var it: LineIterator = lineIterator(reader, allocator);
try pumpIterator(&it, writer, allocator);
}
fn pumpIterator(it: *LineIterator, writer: fs.File.Writer, allocator: mem.Allocator) !void {
while (it.next()) |line| {
defer allocator.free(line);
@ -35,6 +39,37 @@ fn dumpInput(in: fs.File, out: fs.File, allocator: mem.Allocator) !void {
}
}
test "pumpIterator" {
const file = try fs.cwd().openFile("src/test/two-lines.txt", .{ .read = true, .write = false });
defer file.close();
const output = try fs.cwd().createFile("zig-out/test.txt", .{});
defer output.close();
var reader = file.reader();
var it = lineIterator(reader, testing.allocator);
var writer = output.writer();
try pumpIterator(&it, writer, testing.allocator);
const result = try fs.cwd().openFile("zig-out/test.txt", .{ .read = true });
defer result.close();
var rit = lineIterator(result.reader(), testing.allocator);
const line1 = rit.next().?;
defer testing.allocator.free(line1);
try testing.expectEqualStrings("line 1", line1);
const line2 = rit.next().?;
defer testing.allocator.free(line2);
try testing.expectEqualStrings("line 2", line2);
const eof = rit.next();
try testing.expect(eof == null);
}
const LineIterator = struct {
reader: io.BufferedReader(4096, fs.File.Reader),
delimiter: u8,
@ -75,8 +110,8 @@ test "lineIterator returns lines in buffer" {
try testing.expect(eof == null);
}
// trim annoying windows-only carriage return character
fn windowsSafe(line: []const u8) []const u8 {
// trim annoying windows-only carriage return character
if (os.tag == .windows) {
return mem.trimRight(u8, line, "\r");
}