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Correct and extend EstimateNetHeightInner tests 

Corrections are to the median block times, which were generated by subtracting
CBlockIndex::nMedianTimeSpan / 2 from the block height and then multiplying by
the target spacing. GetMedianTimePast() takes an array sorted by std::sort() and
returns element CBlockIndex::nMedianTimeSpan / 2, meaning that if
CBlockIndex::nMedianTimeSpan is odd (which it is), there is an out-by-one error
in the subtraction.
This commit is contained in:
Jack Grigg 2017-07-28 10:35:46 +00:00
parent 047aec1e0e
commit 4a651837be
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GPG Key ID: 665DBCD284F7DAFF
1 changed files with 22 additions and 6 deletions
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28
src/gtest/test_metrics.cpp
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@ -96,24 +96,40 @@ TEST(Metrics, GetLocalSolPS) {
TEST(Metrics, EstimateNetHeightInner) {
// Ensure that the (rounded) current height is returned if the tip is current
SetMockTime(15000);
EXPECT_EQ(100, EstimateNetHeightInner(100, 14250, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(100, 14100, 50, 7500, 150));
SetMockTime(15150);
EXPECT_EQ(100, EstimateNetHeightInner(101, 14400, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(101, 14250, 50, 7500, 150));
// Ensure that correct estimates are returned if the tip is in the past
SetMockTime(15300); // Tip is 2 blocks behind
EXPECT_EQ(100, EstimateNetHeightInner(100, 14250, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(100, 14100, 50, 7500, 150));
SetMockTime(15900); // Tip is 6 blocks behind
EXPECT_EQ(110, EstimateNetHeightInner(100, 14250, 50, 7500, 150));
EXPECT_EQ(110, EstimateNetHeightInner(100, 14100, 50, 7500, 150));
// Check estimates during resync
SetMockTime(15000);
EXPECT_EQ(100, EstimateNetHeightInner( 0, 0, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner( 7, 600, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner( 8, 600, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(10, 750, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(11, 900, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(20, 2100, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(49, 6450, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(50, 6600, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(51, 6750, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(55, 7350, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(56, 7500, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(57, 7650, 50, 7500, 150));
EXPECT_EQ(100, EstimateNetHeightInner(75, 10350, 50, 7500, 150));
// More complex calculations:
SetMockTime(20000);
// - Checkpoint spacing: 200
// -> Average spacing: 175
// -> estimated height: 127 -> 130
EXPECT_EQ(130, EstimateNetHeightInner(100, 14250, 50, 5250, 150));
EXPECT_EQ(130, EstimateNetHeightInner(100, 14100, 50, 5250, 150));
// - Checkpoint spacing: 50
// -> Average spacing: 100
// -> estimated height: 153 -> 150
EXPECT_EQ(150, EstimateNetHeightInner(100, 14250, 50, 12000, 150));
EXPECT_EQ(150, EstimateNetHeightInner(100, 14100, 50, 12000, 150));
}