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pmem: increase coverage, improve smoketest
Improve pmem.CopyTest() doc.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // Copyright 2017 The Periph Authors. All rights reserved. | ||
| // Use of this source code is governed under the Apache License, Version 2.0 | ||
| // that can be found in the LICENSE file. | ||
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| package pmem | ||
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| import "testing" | ||
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| func TestAlloc(t *testing.T) { | ||
| if m, err := Alloc(0); m != nil || err == nil { | ||
| t.Fatal("0 bytes") | ||
| } | ||
| if m, err := Alloc(1); m != nil || err == nil { | ||
| t.Fatal("not 4096 bytes") | ||
| } | ||
| if m, err := Alloc(4096); m != nil || err == nil { | ||
| t.Fatal("not expected to succeed; e.g. it's known to be broken") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| // Copyright 2017 The Periph Authors. All rights reserved. | ||
| // Use of this source code is governed under the Apache License, Version 2.0 | ||
| // that can be found in the LICENSE file. | ||
|
|
||
| package pmem | ||
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| import ( | ||
| "errors" | ||
| "testing" | ||
| "unsafe" | ||
| ) | ||
|
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| func TestSmokeTest_fail(t *testing.T) { | ||
| count := 0 | ||
| alloc := func(size int) (Mem, error) { | ||
| if count == 0 { | ||
| return nil, errors.New("oops") | ||
| } | ||
| count-- | ||
| return allocRam(size) | ||
| } | ||
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| if CopyTest(1024, 1, alloc, copyOk) == nil { | ||
| t.Fatal("first alloc failed") | ||
| } | ||
| count = 1 | ||
| if CopyTest(1024, 1, alloc, copyOk) == nil { | ||
| t.Fatal("second alloc failed") | ||
| } | ||
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| copyFail := func(d, s uint64) error { | ||
| return errors.New("oops") | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyFail) == nil { | ||
| t.Fatal("copy failed") | ||
| } | ||
|
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| copyNop := func(d, s uint64) error { | ||
| return nil | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyNop) == nil { | ||
| t.Fatal("no copy") | ||
| } | ||
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| copyPartial := func(d, s uint64) error { | ||
| return copyRam(d, s, 1024, 2) | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyPartial) == nil { | ||
| t.Fatal("copy corrupted") | ||
| } | ||
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| copyHdr := func(d, s uint64) error { | ||
| toSlice(d)[0] = 0 | ||
| return nil | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyHdr) == nil { | ||
| t.Fatal("header corrupted") | ||
| } | ||
|
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| copyFtr := func(d, s uint64) error { | ||
| toSlice(d)[1023] = 0 | ||
| return copyRam(d, s, 1024, 1) | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyFtr) == nil { | ||
| t.Fatal("footer corrupted") | ||
| } | ||
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| copyOffset := func(d, s uint64) error { | ||
| copyRam(d, s, 1024, 1) | ||
| toSlice(d)[3] = 0 | ||
| return nil | ||
| } | ||
| if CopyTest(1024, 1, allocRam, copyOffset) == nil { | ||
| t.Fatal("copy corrupted") | ||
| } | ||
| } | ||
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| func TestSmokeTest(t *testing.T) { | ||
| // Successfully copy the memory. | ||
| if err := CopyTest(1024, 1, allocRam, copyOk); err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| } | ||
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| // allocRam allocates memory and fake it is physical memory. | ||
| func allocRam(size int) (Mem, error) { | ||
| p := make([]byte, size) | ||
| return &MemAlloc{ | ||
| View: View{ | ||
| Slice: Slice(p), | ||
| orig: p, | ||
| phys: uint64(uintptr(unsafe.Pointer(&p))), | ||
| }, | ||
| }, nil | ||
| } | ||
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| func copyOk(d, s uint64) error { | ||
| return copyRam(d, s, 1024, 1) | ||
| } | ||
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| // copyRam copies the memory. | ||
| func copyRam(pDst, pSrc uint64, size, hole int) error { | ||
| dst := toSlice(pDst) | ||
| src := toSlice(pSrc) | ||
| copy(dst[hole:size-hole], src) | ||
| return nil | ||
| } | ||
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| func toSlice(p uint64) []byte { | ||
| return *(*[]byte)(unsafe.Pointer(uintptr(p))) | ||
| } |
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