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1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
4 */ | 4 */ |
5 | 5 |
6 #include <errno.h> | 6 #include <errno.h> |
7 #include <fcntl.h> | 7 #include <fcntl.h> |
8 #include <string.h> | 8 #include <string.h> |
9 #include <string> | 9 #include <string> |
10 #include <sys/stat.h> | 10 #include <sys/stat.h> |
11 | 11 |
12 #include "nacl_mounts/mount.h" | 12 #include "nacl_io/mount.h" |
13 #include "nacl_mounts/mount_dev.h" | 13 #include "nacl_io/mount_dev.h" |
14 #include "nacl_mounts/mount_mem.h" | 14 #include "nacl_io/mount_mem.h" |
15 #include "nacl_mounts/osdirent.h" | 15 #include "nacl_io/osdirent.h" |
16 | 16 |
17 #include "gtest/gtest.h" | 17 #include "gtest/gtest.h" |
18 | 18 |
19 namespace { | 19 namespace { |
20 | 20 |
21 class MountMemMock : public MountMem { | 21 class MountMemMock : public MountMem { |
22 public: | 22 public: |
23 MountMemMock() { | 23 MountMemMock() { |
24 StringMap_t map; | 24 StringMap_t map; |
25 Init(1, map, NULL); | 25 Init(1, map, NULL); |
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218 double expected_count = kTotalSamples / 256.; | 218 double expected_count = kTotalSamples / 256.; |
219 double chi_squared = 0; | 219 double chi_squared = 0; |
220 for (int i = 0; i < 256; ++i) { | 220 for (int i = 0; i < 256; ++i) { |
221 double difference = byte_count[i] - expected_count; | 221 double difference = byte_count[i] - expected_count; |
222 chi_squared += difference * difference / expected_count; | 222 chi_squared += difference * difference / expected_count; |
223 } | 223 } |
224 | 224 |
225 // Approximate chi-squared value for p-value 0.05, 255 degrees-of-freedom. | 225 // Approximate chi-squared value for p-value 0.05, 255 degrees-of-freedom. |
226 EXPECT_LE(chi_squared, 293.24); | 226 EXPECT_LE(chi_squared, 293.24); |
227 } | 227 } |
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