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fix: dedupe root-mirrored extra filesystems during disk discovery (#1428)

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henrygd
2026-02-24 14:36:53 -05:00
parent 9e2296452b
commit 12545b4b6d
2 changed files with 85 additions and 0 deletions
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34
agent/disk_test.go
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@@ -372,3 +372,37 @@ func TestDiskUsageCaching(t *testing.T) {
"lastDiskUsageUpdate should be refreshed when cache expires")
})
}
func TestHasSameDiskUsage(t *testing.T) {
const toleranceBytes uint64 = 16 * 1024 * 1024
t.Run("returns true when totals and usage are equal", func(t *testing.T) {
a := &disk.UsageStat{Total: 100 * 1024 * 1024 * 1024, Used: 42 * 1024 * 1024 * 1024}
b := &disk.UsageStat{Total: 100 * 1024 * 1024 * 1024, Used: 42 * 1024 * 1024 * 1024}
assert.True(t, hasSameDiskUsage(a, b))
})
t.Run("returns true within tolerance", func(t *testing.T) {
a := &disk.UsageStat{Total: 100 * 1024 * 1024 * 1024, Used: 42 * 1024 * 1024 * 1024}
b := &disk.UsageStat{
Total: a.Total + toleranceBytes - 1,
Used: a.Used - toleranceBytes + 1,
}
assert.True(t, hasSameDiskUsage(a, b))
})
t.Run("returns false when total exceeds tolerance", func(t *testing.T) {
a := &disk.UsageStat{Total: 100 * 1024 * 1024 * 1024, Used: 42 * 1024 * 1024 * 1024}
b := &disk.UsageStat{
Total: a.Total + toleranceBytes + 1,
Used: a.Used,
}
assert.False(t, hasSameDiskUsage(a, b))
})
t.Run("returns false for nil or zero total", func(t *testing.T) {
assert.False(t, hasSameDiskUsage(nil, &disk.UsageStat{Total: 1, Used: 1}))
assert.False(t, hasSameDiskUsage(&disk.UsageStat{Total: 1, Used: 1}, nil))
assert.False(t, hasSameDiskUsage(&disk.UsageStat{Total: 0, Used: 0}, &disk.UsageStat{Total: 1, Used: 1}))
})
}