1 files changed, 72 insertions, 0 deletions
diff --git a/extractor/sampler_test.cc b/extractor/sampler_test.cc
new file mode 100644
index 00000000..4f91965b
--- /dev/null
+++ b/extractor/sampler_test.cc
@@ -0,0 +1,72 @@
+#include <gtest/gtest.h>
+
+#include <memory>
+
+#include "mocks/mock_suffix_array.h"
+#include "phrase_location.h"
+#include "sampler.h"
+
+using namespace std;
+using namespace ::testing;
+
+namespace {
+
+class SamplerTest : public Test {
+ protected:
+  virtual void SetUp() {
+    suffix_array = make_shared<MockSuffixArray>();
+    for (int i = 0; i < 10; ++i) {
+      EXPECT_CALL(*suffix_array, GetSuffix(i)).WillRepeatedly(Return(i));
+    }
+  }
+
+  shared_ptr<MockSuffixArray> suffix_array;
+  shared_ptr<Sampler> sampler;
+};
+
+TEST_F(SamplerTest, TestSuffixArrayRange) {
+  PhraseLocation location(0, 10);
+
+  sampler = make_shared<Sampler>(suffix_array, 1);
+  vector<int> expected_locations = {0};
+  EXPECT_EQ(PhraseLocation(expected_locations, 1), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 2);
+  expected_locations = {0, 5};
+  EXPECT_EQ(PhraseLocation(expected_locations, 1), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 3);
+  expected_locations = {0, 3, 7};
+  EXPECT_EQ(PhraseLocation(expected_locations, 1), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 4);
+  expected_locations = {0, 3, 5, 8};
+  EXPECT_EQ(PhraseLocation(expected_locations, 1), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 100);
+  expected_locations = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+  EXPECT_EQ(PhraseLocation(expected_locations, 1), sampler->Sample(location));
+}
+
+TEST_F(SamplerTest, TestSubstringsSample) {
+  vector<int> locations = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+  PhraseLocation location(locations, 2);
+
+  sampler = make_shared<Sampler>(suffix_array, 1);
+  vector<int> expected_locations = {0, 1};
+  EXPECT_EQ(PhraseLocation(expected_locations, 2), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 2);
+  expected_locations = {0, 1, 6, 7};
+  EXPECT_EQ(PhraseLocation(expected_locations, 2), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 3);
+  expected_locations = {0, 1, 4, 5, 6, 7};
+  EXPECT_EQ(PhraseLocation(expected_locations, 2), sampler->Sample(location));
+
+  sampler = make_shared<Sampler>(suffix_array, 7);
+  expected_locations = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+  EXPECT_EQ(PhraseLocation(expected_locations, 2), sampler->Sample(location));
+}
+
+}  // namespace