# Test Case: Random Regular-File Reads

**Test ID**: TC036-file-read-random

## Objective

Verify independent start, middle, and end `pread(2)` ranges from a deterministic
1 MiB regular file.

## Fixture

Use `images/flat.erofs`, `source/flat/random-test.bin`, and the three
`expected/random-*.bin` files. Evidence asserts layout 0 and exact size.

## Procedure

```sh
./read_probe pread "$mnt/random-test.bin" 0 10240 /tmp/tc036-start
./read_probe pread "$mnt/random-test.bin" 512000 10240 /tmp/tc036-mid
./read_probe pread "$mnt/random-test.bin" 1024000 24576 /tmp/tc036-end
cmp /tmp/repo22-g1/expected/random-start.bin /tmp/tc036-start
cmp /tmp/repo22-g1/expected/random-mid.bin /tmp/tc036-mid
cmp /tmp/repo22-g1/expected/random-end.bin /tmp/tc036-end
sha256 /tmp/tc036-start /tmp/tc036-mid /tmp/tc036-end
```

## Expected Results

- Every bounded `pread` reports its requested byte count and exact offset.
- All three ranges match independently generated source ranges; cleanup passes.