1 files changed, 78 insertions, 0 deletions
diff --git a/extractor/suffix_array_test.cc b/extractor/suffix_array_test.cc
new file mode 100644
index 00000000..8431a16e
--- /dev/null
+++ b/extractor/suffix_array_test.cc
@@ -0,0 +1,78 @@
+#include <gtest/gtest.h>
+
+#include "mocks/mock_data_array.h"
+#include "phrase_location.h"
+#include "suffix_array.h"
+
+#include <vector>
+
+using namespace std;
+using namespace ::testing;
+
+namespace extractor {
+namespace {
+
+class SuffixArrayTest : public Test {
+ protected:
+  virtual void SetUp() {
+    data = {6, 4, 1, 2, 4, 5, 3, 4, 6, 6, 4, 1, 2};
+    data_array = make_shared<MockDataArray>();
+    EXPECT_CALL(*data_array, GetData()).WillRepeatedly(ReturnRef(data));
+    EXPECT_CALL(*data_array, GetVocabularySize()).WillRepeatedly(Return(7));
+    EXPECT_CALL(*data_array, GetSize()).WillRepeatedly(Return(13));
+    suffix_array = make_shared<SuffixArray>(data_array);
+  }
+
+  vector<int> data;
+  shared_ptr<SuffixArray> suffix_array;
+  shared_ptr<MockDataArray> data_array;
+};
+
+TEST_F(SuffixArrayTest, TestData) {
+  EXPECT_EQ(data_array, suffix_array->GetData());
+  EXPECT_EQ(14, suffix_array->GetSize());
+}
+
+TEST_F(SuffixArrayTest, TestBuildSuffixArray) {
+  vector<int> expected_suffix_array =
+      {13, 11, 2, 12, 3, 6, 10, 1, 4, 7, 5, 9, 0, 8};
+  for (size_t i = 0; i < expected_suffix_array.size(); ++i) {
+    EXPECT_EQ(expected_suffix_array[i], suffix_array->GetSuffix(i));
+  }
+}
+
+TEST_F(SuffixArrayTest, TestBuildLCP) {
+  vector<int> expected_lcp = {-1, 0, 2, 0, 1, 0, 0, 3, 1, 1, 0, 0, 4, 1};
+  EXPECT_EQ(expected_lcp, suffix_array->BuildLCPArray());
+}
+
+TEST_F(SuffixArrayTest, TestLookup) {
+  for (size_t i = 0; i < data.size(); ++i) {
+    EXPECT_CALL(*data_array, AtIndex(i)).WillRepeatedly(Return(data[i]));
+  }
+
+  EXPECT_CALL(*data_array, HasWord("word1")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word1")).WillRepeatedly(Return(6));
+  EXPECT_EQ(PhraseLocation(11, 14), suffix_array->Lookup(0, 14, "word1", 0));
+
+  EXPECT_CALL(*data_array, HasWord("word2")).WillRepeatedly(Return(false));
+  EXPECT_EQ(PhraseLocation(0, 0), suffix_array->Lookup(0, 14, "word2", 0));
+
+  EXPECT_CALL(*data_array, HasWord("word3")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word3")).WillRepeatedly(Return(4));
+  EXPECT_EQ(PhraseLocation(11, 13), suffix_array->Lookup(11, 14, "word3", 1));
+
+  EXPECT_CALL(*data_array, HasWord("word4")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word4")).WillRepeatedly(Return(1));
+  EXPECT_EQ(PhraseLocation(11, 13), suffix_array->Lookup(11, 13, "word4", 2));
+
+  EXPECT_CALL(*data_array, HasWord("word5")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word5")).WillRepeatedly(Return(2));
+  EXPECT_EQ(PhraseLocation(11, 13), suffix_array->Lookup(11, 13, "word5", 3));
+
+  EXPECT_EQ(PhraseLocation(12, 13), suffix_array->Lookup(11, 13, "word3", 4));
+  EXPECT_EQ(PhraseLocation(11, 11), suffix_array->Lookup(11, 13, "word5", 1));
+}
+
+} // namespace
+} // namespace extractor