1 files changed, 75 insertions, 0 deletions
diff --git a/extractor/suffix_array_test.cc b/extractor/suffix_array_test.cc
new file mode 100644
index 00000000..d891933c
--- /dev/null
+++ b/extractor/suffix_array_test.cc
@@ -0,0 +1,75 @@
+#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 {
+
+class SuffixArrayTest : public Test {
+ protected:
+  virtual void SetUp() {
+    data = vector<int>{5, 3, 0, 1, 3, 4, 2, 3, 5, 5, 3, 0, 1};
+    data_array = make_shared<MockDataArray>();
+    EXPECT_CALL(*data_array, GetData()).WillRepeatedly(ReturnRef(data));
+    EXPECT_CALL(*data_array, GetVocabularySize()).WillRepeatedly(Return(6));
+    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{2, 11, 3, 12, 6, 1, 10, 4, 7, 5, 0, 9, 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, 2, 0, 1, 0, 0, 3, 1, 1, 0, 0, 4, 1, 0};
+  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(5));
+  EXPECT_EQ(PhraseLocation(10, 13), 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(3));
+  EXPECT_EQ(PhraseLocation(10, 12), suffix_array->Lookup(10, 13, "word3", 1));
+
+  EXPECT_CALL(*data_array, HasWord("word4")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word4")).WillRepeatedly(Return(0));
+  EXPECT_EQ(PhraseLocation(10, 12), suffix_array->Lookup(10, 12, "word4", 2));
+
+  EXPECT_CALL(*data_array, HasWord("word5")).WillRepeatedly(Return(true));
+  EXPECT_CALL(*data_array, GetWordId("word5")).WillRepeatedly(Return(1));
+  EXPECT_EQ(PhraseLocation(10, 12), suffix_array->Lookup(10, 12, "word5", 3));
+
+  EXPECT_EQ(PhraseLocation(10, 11), suffix_array->Lookup(10, 12, "word3", 4));
+  EXPECT_EQ(PhraseLocation(10, 10), suffix_array->Lookup(10, 12, "word5", 1));
+}
+
+}  // namespace