63 lines
2.2 KiB
Zig
63 lines
2.2 KiB
Zig
const std = @import("index.zig");
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const io = std.io;
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const DefaultPrng = std.rand.DefaultPrng;
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const assert = std.debug.assert;
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const mem = std.mem;
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const os = std.os;
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const builtin = @import("builtin");
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test "write a file, read it, then delete it" {
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var raw_bytes: [200 * 1024]u8 = undefined;
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var allocator = &std.heap.FixedBufferAllocator.init(raw_bytes[0..]).allocator;
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var data: [1024]u8 = undefined;
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var prng = DefaultPrng.init(1234);
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prng.random.bytes(data[0..]);
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const tmp_file_name = "temp_test_file.txt";
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{
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var file = try os.File.openWrite(allocator, tmp_file_name);
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defer file.close();
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var file_out_stream = io.FileOutStream.init(&file);
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var buf_stream = io.BufferedOutStream(io.FileOutStream.Error).init(&file_out_stream.stream);
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const st = &buf_stream.stream;
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try st.print("begin");
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try st.write(data[0..]);
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try st.print("end");
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try buf_stream.flush();
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}
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{
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var file = try os.File.openRead(allocator, tmp_file_name);
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defer file.close();
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const file_size = try file.getEndPos();
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const expected_file_size = "begin".len + data.len + "end".len;
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assert(file_size == expected_file_size);
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var file_in_stream = io.FileInStream.init(&file);
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var buf_stream = io.BufferedInStream(io.FileInStream.Error).init(&file_in_stream.stream);
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const st = &buf_stream.stream;
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const contents = try st.readAllAlloc(allocator, 2 * 1024);
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defer allocator.free(contents);
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assert(mem.eql(u8, contents[0.."begin".len], "begin"));
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assert(mem.eql(u8, contents["begin".len .. contents.len - "end".len], data));
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assert(mem.eql(u8, contents[contents.len - "end".len ..], "end"));
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}
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try os.deleteFile(allocator, tmp_file_name);
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}
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test "BufferOutStream" {
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var bytes: [100]u8 = undefined;
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var allocator = &std.heap.FixedBufferAllocator.init(bytes[0..]).allocator;
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var buffer = try std.Buffer.initSize(allocator, 0);
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var buf_stream = &std.io.BufferOutStream.init(&buffer).stream;
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const x: i32 = 42;
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const y: i32 = 1234;
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try buf_stream.print("x: {}\ny: {}\n", x, y);
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assert(mem.eql(u8, buffer.toSlice(), "x: 42\ny: 1234\n"));
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}
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