31 lines
990 B
Markdown
31 lines
990 B
Markdown
# Test Case: Random Regular-File Reads
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**Test ID**: TC036-file-read-random
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## Objective
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Verify independent start, middle, and end `pread(2)` ranges from a deterministic
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1 MiB regular file.
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## Fixture
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Use `images/flat.erofs`, `source/flat/random-test.bin`, and the three
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`expected/random-*.bin` files. Evidence asserts layout 0 and exact size.
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## Procedure
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```sh
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./read_probe pread "$mnt/random-test.bin" 0 10240 /tmp/tc036-start
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./read_probe pread "$mnt/random-test.bin" 512000 10240 /tmp/tc036-mid
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./read_probe pread "$mnt/random-test.bin" 1024000 24576 /tmp/tc036-end
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cmp /tmp/repo22-g1/expected/random-start.bin /tmp/tc036-start
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cmp /tmp/repo22-g1/expected/random-mid.bin /tmp/tc036-mid
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cmp /tmp/repo22-g1/expected/random-end.bin /tmp/tc036-end
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sha256 /tmp/tc036-start /tmp/tc036-mid /tmp/tc036-end
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```
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## Expected Results
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- Every bounded `pread` reports its requested byte count and exact offset.
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- All three ranges match independently generated source ranges; cleanup passes.
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