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-rw-r--r--utils/crp_test.cc102
1 files changed, 102 insertions, 0 deletions
diff --git a/utils/crp_test.cc b/utils/crp_test.cc
new file mode 100644
index 00000000..561cd4dd
--- /dev/null
+++ b/utils/crp_test.cc
@@ -0,0 +1,102 @@
+#include <iostream>
+#include <vector>
+#include <string>
+
+#include <gtest/gtest.h>
+
+#include "ccrp.h"
+#include "sampler.h"
+
+const size_t MAX_DOC_LEN_CHARS = 10000000;
+
+using namespace std;
+
+class CRPTest : public testing::Test {
+ public:
+ CRPTest() {}
+ protected:
+ virtual void SetUp() { }
+ virtual void TearDown() { }
+ MT19937 rng;
+};
+
+TEST_F(CRPTest, Dist) {
+ CCRP<string> crp(0.1, 5);
+ double un = 0.25;
+ int tt = 0;
+ tt += crp.increment("hi", un, &rng);
+ tt += crp.increment("foo", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ tt += crp.increment("bar", un, &rng);
+ cout << "tt=" << tt << endl;
+ cout << crp << endl;
+ cout << " P(bar)=" << crp.prob("bar", un) << endl;
+ cout << " P(hi)=" << crp.prob("hi", un) << endl;
+ cout << " P(baz)=" << crp.prob("baz", un) << endl;
+ cout << " P(foo)=" << crp.prob("foo", un) << endl;
+ double x = crp.prob("bar", un) + crp.prob("hi", un) + crp.prob("baz", un) + crp.prob("foo", un);
+ cout << " tot=" << x << endl;
+ EXPECT_FLOAT_EQ(1.0, x);
+ tt += crp.decrement("hi", &rng);
+ tt += crp.decrement("bar", &rng);
+ cout << crp << endl;
+ tt += crp.decrement("bar", &rng);
+ cout << crp << endl;
+ cout << "tt=" << tt << endl;
+}
+
+TEST_F(CRPTest, Exchangability) {
+ double tot = 0;
+ double xt = 0;
+ CCRP<int> crp(0.5, 1.0);
+ int cust = 10;
+ vector<int> hist(cust + 1, 0);
+ for (int i = 0; i < cust; ++i) { crp.increment(1, 1.0, &rng); }
+ const int samples = 100000;
+ const bool simulate = true;
+ for (int k = 0; k < samples; ++k) {
+ if (!simulate) {
+ crp.clear();
+ for (int i = 0; i < cust; ++i) { crp.increment(1, 1.0, &rng); }
+ } else {
+ int da = rng.next() * cust;
+ bool a = rng.next() < 0.5;
+ if (a) {
+ for (int i = 0; i < da; ++i) { crp.increment(1, 1.0, &rng); }
+ for (int i = 0; i < da; ++i) { crp.decrement(1, &rng); }
+ xt += 1.0;
+ } else {
+ for (int i = 0; i < da; ++i) { crp.decrement(1, &rng); }
+ for (int i = 0; i < da; ++i) { crp.increment(1, 1.0, &rng); }
+ }
+ }
+ int c = crp.num_tables(1);
+ ++hist[c];
+ tot += c;
+ }
+ EXPECT_EQ(cust, crp.num_customers());
+ cerr << "P(a) = " << (xt / samples) << endl;
+ cerr << "E[num tables] = " << (tot / samples) << endl;
+ double error = fabs((tot / samples) - 5.4);
+ cerr << " error = " << error << endl;
+ EXPECT_LT(error, 0.1); // it's possible for this to fail, but
+ // very, very unlikely
+ for (int i = 1; i <= cust; ++i)
+ cerr << i << ' ' << (hist[i]) << endl;
+}
+
+TEST_F(CRPTest, LP) {
+ CCRP<string> crp(1,1,1,1,0.1,50.0);
+ crp.increment("foo", 1.0, &rng);
+ cerr << crp.log_crp_prob() << endl;
+}
+
+int main(int argc, char** argv) {
+ testing::InitGoogleTest(&argc, argv);
+ return RUN_ALL_TESTS();
+}