1 files changed, 59 insertions, 0 deletions
diff --git a/tesseract/unittest/stats_test.cc b/tesseract/unittest/stats_test.cc
new file mode 100644
index 00000000..58c3483d
--- /dev/null
+++ b/tesseract/unittest/stats_test.cc
@@ -0,0 +1,59 @@
+// (C) Copyright 2017, Google Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "genericvector.h"
+#include "kdpair.h"
+#include "statistc.h"
+
+#include "include_gunit.h"
+
+namespace tesseract {
+
+const int kTestData[] = {2, 0, 12, 1, 1, 2, 10, 1, 0, 0, 0, 2, 0, 4, 1, 1};
+
+class STATSTest : public testing::Test {
+ public:
+  void SetUp() {
+    std::locale::global(std::locale(""));
+    stats_.set_range(0, 16);
+    for (size_t i = 0; i < ARRAYSIZE(kTestData); ++i)
+      stats_.add(i, kTestData[i]);
+  }
+
+  void TearDown() {}
+
+  STATS stats_;
+};
+
+// Tests some basic numbers from the stats_.
+TEST_F(STATSTest, BasicStats) {
+  EXPECT_EQ(37, stats_.get_total());
+  EXPECT_EQ(2, stats_.mode());
+  EXPECT_EQ(12, stats_.pile_count(2));
+}
+
+// Tests the top_n_modes function.
+TEST_F(STATSTest, TopNModes) {
+  GenericVector<tesseract::KDPairInc<float, int> > modes;
+  int num_modes = stats_.top_n_modes(3, &modes);
+  EXPECT_EQ(3, num_modes);
+  // Mode0 is 12 1 1 = 14 total count with a mean of 2 3/14.
+  EXPECT_FLOAT_EQ(2.0f + 3.0f / 14, modes[0].key());
+  EXPECT_EQ(14, modes[0].data());
+  // Mode 1 is 2 10 1 = 13 total count with a mean of 5 12/13.
+  EXPECT_FLOAT_EQ(5.0f + 12.0f / 13, modes[1].key());
+  EXPECT_EQ(13, modes[1].data());
+  // Mode 2 is 4 1 1 = 6 total count with a mean of 13.5.
+  EXPECT_FLOAT_EQ(13.5f, modes[2].key());
+  EXPECT_EQ(6, modes[2].data());
+}
+
+}  // namespace.