Rename the PolicyManager to UpdateManager.
This change renames the PolicyManager class, directory, tests, etc,
to avoid confusion with libpolicy and its classes.
BUG=chromium:373551
TEST=emerged on link.
CQ-DEPEND=CL:I43081673c7ba409f02273197da7915537bde39c6
Change-Id: Iffa76caa3b95ecbbdba87ab01006d1d8ce35a27f
Reviewed-on: https://chromium-review.googlesource.com/201876
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: David Zeuthen <zeuthen@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
diff --git a/update_manager/prng_unittest.cc b/update_manager/prng_unittest.cc
new file mode 100644
index 0000000..4d165b3
--- /dev/null
+++ b/update_manager/prng_unittest.cc
@@ -0,0 +1,67 @@
+// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "update_engine/update_manager/prng.h"
+
+#include <vector>
+
+#include <gtest/gtest.h>
+
+using std::vector;
+
+namespace chromeos_update_manager {
+
+TEST(UmPRNGTest, ShouldBeDeterministic) {
+ PRNG a(42);
+ PRNG b(42);
+
+ for (int i = 0; i < 1000; ++i) {
+ EXPECT_EQ(a.Rand(), b.Rand()) << "Iteration i=" << i;
+ }
+}
+
+TEST(UmPRNGTest, SeedChangesGeneratedSequence) {
+ PRNG a(42);
+ PRNG b(5);
+
+ vector<uint32_t> values_a;
+ vector<uint32_t> values_b;
+
+ for (int i = 0; i < 100; ++i) {
+ values_a.push_back(a.Rand());
+ values_b.push_back(b.Rand());
+ }
+ EXPECT_NE(values_a, values_b);
+}
+
+TEST(UmPRNGTest, IsNotConstant) {
+ PRNG prng(5);
+
+ uint32_t initial_value = prng.Rand();
+ bool prng_is_constant = true;
+ for (int i = 0; i < 100; ++i) {
+ if (prng.Rand() != initial_value) {
+ prng_is_constant = false;
+ break;
+ }
+ }
+ EXPECT_FALSE(prng_is_constant) << "After 100 iterations.";
+}
+
+TEST(UmPRNGTest, RandCoversRange) {
+ PRNG a(42);
+ int hits[11] = { 0 };
+
+ for (int i = 0; i < 1000; i++) {
+ int r = a.RandMinMax(0, 10);
+ ASSERT_LE(0, r);
+ ASSERT_GE(10, r);
+ hits[r]++;
+ }
+
+ for (auto& hit : hits)
+ EXPECT_LT(0, hit);
+}
+
+} // namespace chromeos_update_manager