1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
const std = @import("std");
const io = std.io;
const DefaultPrng = std.Random.DefaultPrng;
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
const expectError = std.testing.expectError;
const mem = std.mem;
const fs = std.fs;
const File = std.fs.File;
const native_endian = @import("builtin").target.cpu.arch.endian();
const tmpDir = std.testing.tmpDir;
test "write a file, read it, then delete it" {
var tmp = tmpDir(.{});
defer tmp.cleanup();
var data: [1024]u8 = undefined;
var prng = DefaultPrng.init(std.testing.random_seed);
const random = prng.random();
random.bytes(data[0..]);
const tmp_file_name = "temp_test_file.txt";
{
var file = try tmp.dir.createFile(tmp_file_name, .{});
defer file.close();
var file_writer = file.writer(&.{});
const st = &file_writer.interface;
try st.print("begin", .{});
try st.writeAll(&data);
try st.print("end", .{});
try st.flush();
}
{
// Make sure the exclusive flag is honored.
try expectError(File.OpenError.PathAlreadyExists, tmp.dir.createFile(tmp_file_name, .{ .exclusive = true }));
}
{
var file = try tmp.dir.openFile(tmp_file_name, .{});
defer file.close();
const file_size = try file.getEndPos();
const expected_file_size: u64 = "begin".len + data.len + "end".len;
try expectEqual(expected_file_size, file_size);
var file_buffer: [1024]u8 = undefined;
var file_reader = file.reader(&file_buffer);
const contents = try file_reader.interface.allocRemaining(std.testing.allocator, .limited(2 * 1024));
defer std.testing.allocator.free(contents);
try expect(mem.eql(u8, contents[0.."begin".len], "begin"));
try expect(mem.eql(u8, contents["begin".len .. contents.len - "end".len], &data));
try expect(mem.eql(u8, contents[contents.len - "end".len ..], "end"));
}
try tmp.dir.deleteFile(tmp_file_name);
}
test "File seek ops" {
var tmp = tmpDir(.{});
defer tmp.cleanup();
const tmp_file_name = "temp_test_file.txt";
var file = try tmp.dir.createFile(tmp_file_name, .{});
defer file.close();
try file.writeAll(&([_]u8{0x55} ** 8192));
// Seek to the end
try file.seekFromEnd(0);
try expect((try file.getPos()) == try file.getEndPos());
// Negative delta
try file.seekBy(-4096);
try expect((try file.getPos()) == 4096);
// Positive delta
try file.seekBy(10);
try expect((try file.getPos()) == 4106);
// Absolute position
try file.seekTo(1234);
try expect((try file.getPos()) == 1234);
}
test "setEndPos" {
var tmp = tmpDir(.{});
defer tmp.cleanup();
const tmp_file_name = "temp_test_file.txt";
var file = try tmp.dir.createFile(tmp_file_name, .{});
defer file.close();
// Verify that the file size changes and the file offset is not moved
try std.testing.expect((try file.getEndPos()) == 0);
try std.testing.expect((try file.getPos()) == 0);
try file.setEndPos(8192);
try std.testing.expect((try file.getEndPos()) == 8192);
try std.testing.expect((try file.getPos()) == 0);
try file.seekTo(100);
try file.setEndPos(4096);
try std.testing.expect((try file.getEndPos()) == 4096);
try std.testing.expect((try file.getPos()) == 100);
try file.setEndPos(0);
try std.testing.expect((try file.getEndPos()) == 0);
try std.testing.expect((try file.getPos()) == 100);
}
test "updateTimes" {
var tmp = tmpDir(.{});
defer tmp.cleanup();
const tmp_file_name = "just_a_temporary_file.txt";
var file = try tmp.dir.createFile(tmp_file_name, .{ .read = true });
defer file.close();
const stat_old = try file.stat();
// Set atime and mtime to 5s before
try file.updateTimes(
stat_old.atime - 5 * std.time.ns_per_s,
stat_old.mtime - 5 * std.time.ns_per_s,
);
const stat_new = try file.stat();
try expect(stat_new.atime < stat_old.atime);
try expect(stat_new.mtime < stat_old.mtime);
}
test "GenericReader methods can return error.EndOfStream" {
// https://github.com/ziglang/zig/issues/17733
var fbs = std.io.fixedBufferStream("");
try std.testing.expectError(
error.EndOfStream,
fbs.reader().readEnum(enum(u8) { a, b }, .little),
);
try std.testing.expectError(
error.EndOfStream,
fbs.reader().isBytes("foo"),
);
}
test "Adapted DeprecatedReader EndOfStream" {
var fbs: io.FixedBufferStream([]const u8) = .{ .buffer = &.{}, .pos = 0 };
const reader = fbs.reader();
var buf: [1]u8 = undefined;
var adapted = reader.adaptToNewApi(&buf);
try std.testing.expectError(error.EndOfStream, adapted.new_interface.takeByte());
}
|
