Merge to XFA: Complete unit tests for CPDF_Array

Also remove one unnecessary member function.

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1660523003 .

(cherry picked from commit 6f358daa2e8b1639a1c3a3f07a449f8450197e8b)

Review URL: https://codereview.chromium.org/1667873002 .

3 files changed, 436 insertions, 46 deletions

diff --git a/core/include/fpdfapi/fpdf_objects.h b/core/include/fpdfapi/fpdf_objects.h
index 86035a86ad..ddc16d95b0 100644
--- a/core/include/fpdfapi/fpdf_objects.h
+++ b/core/include/fpdfapi/fpdf_objects.h
@@ -312,7 +312,6 @@ class CPDF_Array : public CPDF_Object {
   void AddReference(CPDF_IndirectObjectHolder* pDoc, CPDF_Object* obj) {
     AddReference(pDoc, obj->GetObjNum());
   }
-  void AddNumber16(FX_FLOAT value) { AddNumber(value); }
 
  protected:
   ~CPDF_Array();
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
index 813c18a4c5..5f8b075296 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
@@ -454,10 +454,10 @@ void CPDF_Dictionary::SetAtRect(const CFX_ByteStringC& key,
 void CPDF_Dictionary::SetAtMatrix(const CFX_ByteStringC& key,
                                   const CFX_Matrix& matrix) {
   CPDF_Array* pArray = new CPDF_Array;
-  pArray->AddNumber16(matrix.a);
-  pArray->AddNumber16(matrix.b);
-  pArray->AddNumber16(matrix.c);
-  pArray->AddNumber16(matrix.d);
+  pArray->AddNumber(matrix.a);
+  pArray->AddNumber(matrix.b);
+  pArray->AddNumber(matrix.c);
+  pArray->AddNumber(matrix.d);
   pArray->AddNumber(matrix.e);
   pArray->AddNumber(matrix.f);
   SetAt(key, pArray);
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects_unittest.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects_unittest.cpp
index 9de31c8673..d2c30fa6ae 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects_unittest.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects_unittest.cpp
@@ -10,6 +10,31 @@
 #include "core/include/fxcrt/fx_basic.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace {
+
+using ScopedArray = std::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Array>>;
+
+void TestArrayAccessors(const CPDF_Array* arr,
+                        size_t index,
+                        const char* str_val,
+                        const char* const_str_val,
+                        int int_val,
+                        float float_val,
+                        CPDF_Array* arr_val,
+                        CPDF_Dictionary* dict_val,
+                        CPDF_Stream* stream_val) {
+  EXPECT_STREQ(str_val, arr->GetStringAt(index).c_str());
+  EXPECT_STREQ(const_str_val, arr->GetConstStringAt(index).GetCStr());
+  EXPECT_EQ(int_val, arr->GetIntegerAt(index));
+  EXPECT_EQ(float_val, arr->GetNumberAt(index));
+  EXPECT_EQ(float_val, arr->GetFloatAt(index));
+  EXPECT_EQ(arr_val, arr->GetArrayAt(index));
+  EXPECT_EQ(dict_val, arr->GetDictAt(index));
+  EXPECT_EQ(stream_val, arr->GetStreamAt(index));
+}
+
+}  // namespace
+
 class PDFObjectsTest : public testing::Test {
  public:
   void SetUp() override {
@@ -154,13 +179,13 @@ TEST_F(PDFObjectsTest, GetString) {
       "",      "",     "",     ""};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_STREQ(m_DirectObjs[i]->GetString().c_str(), direct_obj_results[i]);
+    EXPECT_STREQ(direct_obj_results[i], m_DirectObjs[i]->GetString().c_str());
 
   // Check indirect references.
   const char* indirect_obj_results[] = {"true", "1245", "\t\n", "space",
                                         "",     "",     ""};
   for (size_t i = 0; i < m_RefObjs.size(); ++i) {
-    EXPECT_STREQ(m_RefObjs[i]->GetString().c_str(), indirect_obj_results[i]);
+    EXPECT_STREQ(indirect_obj_results[i], m_RefObjs[i]->GetString().c_str());
   }
 }
 
@@ -171,11 +196,11 @@ TEST_F(PDFObjectsTest, GetConstString) {
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i) {
     if (!direct_obj_results[i]) {
-      EXPECT_EQ(m_DirectObjs[i]->GetConstString().GetCStr(),
-                direct_obj_results[i]);
+      EXPECT_EQ(direct_obj_results[i],
+                m_DirectObjs[i]->GetConstString().GetCStr());
     } else {
-      EXPECT_STREQ(m_DirectObjs[i]->GetConstString().GetCStr(),
-                   direct_obj_results[i]);
+      EXPECT_STREQ(direct_obj_results[i],
+                   m_DirectObjs[i]->GetConstString().GetCStr());
     }
   }
   // Check indirect references.
@@ -183,10 +208,10 @@ TEST_F(PDFObjectsTest, GetConstString) {
                                         nullptr, nullptr, nullptr};
   for (size_t i = 0; i < m_RefObjs.size(); ++i) {
     if (!indirect_obj_results[i]) {
-      EXPECT_EQ(m_RefObjs[i]->GetConstString().GetCStr(), nullptr);
+      EXPECT_EQ(nullptr, m_RefObjs[i]->GetConstString().GetCStr());
     } else {
-      EXPECT_STREQ(m_RefObjs[i]->GetConstString().GetCStr(),
-                   indirect_obj_results[i]);
+      EXPECT_STREQ(indirect_obj_results[i],
+                   m_RefObjs[i]->GetConstString().GetCStr());
     }
   }
 }
@@ -198,12 +223,12 @@ TEST_F(PDFObjectsTest, GetUnicodeText) {
       L""};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_STREQ(m_DirectObjs[i]->GetUnicodeText().c_str(),
-                 direct_obj_results[i]);
+    EXPECT_STREQ(direct_obj_results[i],
+                 m_DirectObjs[i]->GetUnicodeText().c_str());
 
   // Check indirect references.
   for (const auto& it : m_RefObjs)
-    EXPECT_STREQ(it->GetUnicodeText().c_str(), L"");
+    EXPECT_STREQ(L"", it->GetUnicodeText().c_str());
 }
 
 TEST_F(PDFObjectsTest, GetNumber) {
@@ -211,24 +236,24 @@ TEST_F(PDFObjectsTest, GetNumber) {
                                          0, 0, 0,    0,        0};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetNumber(), direct_obj_results[i]);
+    EXPECT_EQ(direct_obj_results[i], m_DirectObjs[i]->GetNumber());
 
   // Check indirect references.
   const FX_FLOAT indirect_obj_results[] = {0, 1245, 0, 0, 0, 0, 0};
   for (size_t i = 0; i < m_RefObjs.size(); ++i)
-    EXPECT_EQ(m_RefObjs[i]->GetNumber(), indirect_obj_results[i]);
+    EXPECT_EQ(indirect_obj_results[i], m_RefObjs[i]->GetNumber());
 }
 
 TEST_F(PDFObjectsTest, GetInteger) {
   const int direct_obj_results[] = {0, 1, 1245, 9, 0, 0, 0, 0, 0, 0, 0};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetInteger(), direct_obj_results[i]);
+    EXPECT_EQ(direct_obj_results[i], m_DirectObjs[i]->GetInteger());
 
   // Check indirect references.
   const int indirect_obj_results[] = {1, 1245, 0, 0, 0, 0, 0};
   for (size_t i = 0; i < m_RefObjs.size(); ++i)
-    EXPECT_EQ(m_RefObjs[i]->GetInteger(), indirect_obj_results[i]);
+    EXPECT_EQ(indirect_obj_results[i], m_RefObjs[i]->GetInteger());
 }
 
 TEST_F(PDFObjectsTest, GetDict) {
@@ -237,13 +262,13 @@ TEST_F(PDFObjectsTest, GetDict) {
       nullptr, nullptr, m_DictObj, m_StreamDictObj, nullptr};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetDict(), direct_obj_results[i]);
+    EXPECT_EQ(direct_obj_results[i], m_DirectObjs[i]->GetDict());
 
   // Check indirect references.
   const CPDF_Dictionary* indirect_obj_results[] = {
       nullptr, nullptr, nullptr, nullptr, nullptr, m_DictObj, m_StreamDictObj};
   for (size_t i = 0; i < m_RefObjs.size(); ++i)
-    EXPECT_EQ(m_RefObjs[i]->GetDict(), indirect_obj_results[i]);
+    EXPECT_EQ(indirect_obj_results[i], m_RefObjs[i]->GetDict());
 }
 
 TEST_F(PDFObjectsTest, GetArray) {
@@ -252,11 +277,11 @@ TEST_F(PDFObjectsTest, GetArray) {
       nullptr, m_ArrayObj, nullptr, nullptr, nullptr};
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetArray(), direct_obj_results[i]);
+    EXPECT_EQ(direct_obj_results[i], m_DirectObjs[i]->GetArray());
 
   // Check indirect references.
   for (const auto& it : m_RefObjs)
-    EXPECT_EQ(it->GetArray(), nullptr);
+    EXPECT_EQ(nullptr, it->GetArray());
 }
 
 TEST_F(PDFObjectsTest, Clone) {
@@ -276,21 +301,21 @@ TEST_F(PDFObjectsTest, Clone) {
 TEST_F(PDFObjectsTest, GetType) {
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetType(), m_DirectObjTypes[i]);
+    EXPECT_EQ(m_DirectObjTypes[i], m_DirectObjs[i]->GetType());
 
   // Check indirect references.
   for (const auto& it : m_RefObjs)
-    EXPECT_EQ(it->GetType(), CPDF_Object::REFERENCE);
+    EXPECT_EQ(CPDF_Object::REFERENCE, it->GetType());
 }
 
 TEST_F(PDFObjectsTest, GetDirect) {
   // Check for direct objects.
   for (size_t i = 0; i < m_DirectObjs.size(); ++i)
-    EXPECT_EQ(m_DirectObjs[i]->GetDirect(), m_DirectObjs[i].get());
+    EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->GetDirect());
 
   // Check indirect references.
   for (size_t i = 0; i < m_RefObjs.size(); ++i)
-    EXPECT_EQ(m_RefObjs[i]->GetDirect(), m_IndirectObjs[i]);
+    EXPECT_EQ(m_IndirectObjs[i], m_RefObjs[i]->GetDirect());
 }
 
 TEST_F(PDFObjectsTest, SetString) {
@@ -301,7 +326,7 @@ TEST_F(PDFObjectsTest, SetString) {
                             "changed", "",      "NewName"};
   for (size_t i = 0; i < FX_ArraySize(set_values); ++i) {
     m_DirectObjs[i]->SetString(set_values[i]);
-    EXPECT_STREQ(m_DirectObjs[i]->GetString().c_str(), expected[i]);
+    EXPECT_STREQ(expected[i], m_DirectObjs[i]->GetString().c_str());
   }
 }
 
@@ -310,66 +335,432 @@ TEST_F(PDFObjectsTest, IsTypeAndAsType) {
   for (size_t i = 0; i < m_DirectObjs.size(); ++i) {
     if (m_DirectObjTypes[i] == CPDF_Object::ARRAY) {
       EXPECT_TRUE(m_DirectObjs[i]->IsArray());
-      EXPECT_EQ(m_DirectObjs[i]->AsArray(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsArray());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsArray());
-      EXPECT_EQ(m_DirectObjs[i]->AsArray(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsArray());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::BOOLEAN) {
       EXPECT_TRUE(m_DirectObjs[i]->IsBoolean());
-      EXPECT_EQ(m_DirectObjs[i]->AsBoolean(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsBoolean());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsBoolean());
-      EXPECT_EQ(m_DirectObjs[i]->AsBoolean(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsBoolean());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::NAME) {
       EXPECT_TRUE(m_DirectObjs[i]->IsName());
-      EXPECT_EQ(m_DirectObjs[i]->AsName(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsName());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsName());
-      EXPECT_EQ(m_DirectObjs[i]->AsName(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsName());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::NUMBER) {
       EXPECT_TRUE(m_DirectObjs[i]->IsNumber());
-      EXPECT_EQ(m_DirectObjs[i]->AsNumber(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsNumber());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsNumber());
-      EXPECT_EQ(m_DirectObjs[i]->AsNumber(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsNumber());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::STRING) {
       EXPECT_TRUE(m_DirectObjs[i]->IsString());
-      EXPECT_EQ(m_DirectObjs[i]->AsString(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsString());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsString());
-      EXPECT_EQ(m_DirectObjs[i]->AsString(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsString());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::DICTIONARY) {
       EXPECT_TRUE(m_DirectObjs[i]->IsDictionary());
-      EXPECT_EQ(m_DirectObjs[i]->AsDictionary(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsDictionary());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsDictionary());
-      EXPECT_EQ(m_DirectObjs[i]->AsDictionary(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsDictionary());
     }
 
     if (m_DirectObjTypes[i] == CPDF_Object::STREAM) {
       EXPECT_TRUE(m_DirectObjs[i]->IsStream());
-      EXPECT_EQ(m_DirectObjs[i]->AsStream(), m_DirectObjs[i].get());
+      EXPECT_EQ(m_DirectObjs[i].get(), m_DirectObjs[i]->AsStream());
     } else {
       EXPECT_FALSE(m_DirectObjs[i]->IsStream());
-      EXPECT_EQ(m_DirectObjs[i]->AsStream(), nullptr);
+      EXPECT_EQ(nullptr, m_DirectObjs[i]->AsStream());
     }
 
     EXPECT_FALSE(m_DirectObjs[i]->IsReference());
-    EXPECT_EQ(m_DirectObjs[i]->AsReference(), nullptr);
+    EXPECT_EQ(nullptr, m_DirectObjs[i]->AsReference());
   }
   // Check indirect references.
   for (size_t i = 0; i < m_RefObjs.size(); ++i) {
     EXPECT_TRUE(m_RefObjs[i]->IsReference());
-    EXPECT_EQ(m_RefObjs[i]->AsReference(), m_RefObjs[i].get());
+    EXPECT_EQ(m_RefObjs[i].get(), m_RefObjs[i]->AsReference());
+  }
+}
+
+TEST(PDFArrayTest, GetMatrix) {
+  float elems[][6] = {{0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f},
+                      {1, 2, 3, 4, 5, 6},
+                      {2.3f, 4.05f, 3, -2, -3, 0.0f},
+                      {0.05f, 0.1f, 0.56f, 0.67f, 1.34f, 99.9f}};
+  for (size_t i = 0; i < FX_ArraySize(elems); ++i) {
+    ScopedArray arr(new CPDF_Array);
+    CFX_Matrix matrix(elems[i][0], elems[i][1], elems[i][2], elems[i][3],
+                      elems[i][4], elems[i][5]);
+    for (size_t j = 0; j < 6; ++j)
+      arr->AddNumber(elems[i][j]);
+    CFX_Matrix arr_matrix = arr->GetMatrix();
+    EXPECT_EQ(matrix.GetA(), arr_matrix.GetA());
+    EXPECT_EQ(matrix.GetB(), arr_matrix.GetB());
+    EXPECT_EQ(matrix.GetC(), arr_matrix.GetC());
+    EXPECT_EQ(matrix.GetD(), arr_matrix.GetD());
+    EXPECT_EQ(matrix.GetE(), arr_matrix.GetE());
+    EXPECT_EQ(matrix.GetF(), arr_matrix.GetF());
+  }
+}
+
+TEST(PDFArrayTest, GetRect) {
+  float elems[][4] = {{0.0f, 0.0f, 0.0f, 0.0f},
+                      {1, 2, 5, 6},
+                      {2.3f, 4.05f, -3, 0.0f},
+                      {0.05f, 0.1f, 1.34f, 99.9f}};
+  for (size_t i = 0; i < FX_ArraySize(elems); ++i) {
+    ScopedArray arr(new CPDF_Array);
+    CFX_FloatRect rect(elems[i]);
+    for (size_t j = 0; j < 4; ++j)
+      arr->AddNumber(elems[i][j]);
+    CFX_FloatRect arr_rect = arr->GetRect();
+    EXPECT_EQ(rect.left, arr_rect.left);
+    EXPECT_EQ(rect.right, arr_rect.right);
+    EXPECT_EQ(rect.bottom, arr_rect.bottom);
+    EXPECT_EQ(rect.top, arr_rect.top);
+  }
+}
+
+TEST(PDFArrayTest, GetTypeAt) {
+  {
+    // Boolean array.
+    bool vals[] = {true, false, false, true, true};
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i)
+      arr->InsertAt(i, new CPDF_Boolean(vals[i]));
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      TestArrayAccessors(arr.get(), i,                // Array and index.
+                         vals[i] ? "true" : "false",  // String value.
+                         nullptr,                     // Const string value.
+                         vals[i] ? 1 : 0,             // Integer value.
+                         0,                           // Float value.
+                         nullptr,                     // Array value.
+                         nullptr,                     // Dictionary value.
+                         nullptr);                    // Stream value.
+    }
+  }
+  {
+    // Integer array.
+    int vals[] = {10, 0, -345, 2089345456, -1000000000, 567, 93658767};
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i)
+      arr->InsertAt(i, new CPDF_Number(vals[i]));
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      char buf[33];
+      TestArrayAccessors(arr.get(), i,                  // Array and index.
+                         FXSYS_itoa(vals[i], buf, 10),  // String value.
+                         nullptr,                       // Const string value.
+                         vals[i],                       // Integer value.
+                         vals[i],                       // Float value.
+                         nullptr,                       // Array value.
+                         nullptr,                       // Dictionary value.
+                         nullptr);                      // Stream value.
+    }
+  }
+  {
+    // Float array.
+    float vals[] = {0.0f,    0,     10,    10.0f,   0.0345f,
+                    897.34f, -2.5f, -1.0f, -345.0f, -0.0f};
+    const char* expected_str[] = {"0",      "0",    "10", "10",   "0.0345",
+                                  "897.34", "-2.5", "-1", "-345", "0"};
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      arr->InsertAt(i, new CPDF_Number(vals[i]));
+    }
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      TestArrayAccessors(arr.get(), i,     // Array and index.
+                         expected_str[i],  // String value.
+                         nullptr,          // Const string value.
+                         vals[i],          // Integer value.
+                         vals[i],          // Float value.
+                         nullptr,          // Array value.
+                         nullptr,          // Dictionary value.
+                         nullptr);         // Stream value.
+    }
+  }
+  {
+    // String and name array
+    const char* const vals[] = {"this", "adsde$%^", "\r\t",           "\"012",
+                                ".",    "EYREW",    "It is a joke :)"};
+    ScopedArray string_array(new CPDF_Array);
+    ScopedArray name_array(new CPDF_Array);
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      string_array->InsertAt(i, new CPDF_String(vals[i], false));
+      name_array->InsertAt(i, new CPDF_Name(vals[i]));
+    }
+    for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+      TestArrayAccessors(string_array.get(), i,  // Array and index.
+                         vals[i],                // String value.
+                         vals[i],                // Const string value.
+                         0,                      // Integer value.
+                         0,                      // Float value.
+                         nullptr,                // Array value.
+                         nullptr,                // Dictionary value.
+                         nullptr);               // Stream value.
+      TestArrayAccessors(name_array.get(), i,    // Array and index.
+                         vals[i],                // String value.
+                         vals[i],                // Const string value.
+                         0,                      // Integer value.
+                         0,                      // Float value.
+                         nullptr,                // Array value.
+                         nullptr,                // Dictionary value.
+                         nullptr);               // Stream value.
+    }
+  }
+  {
+    // Null element array.
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < 3; ++i)
+      arr->InsertAt(i, new CPDF_Null);
+    for (size_t i = 0; i < 3; ++i) {
+      TestArrayAccessors(arr.get(), i,  // Array and index.
+                         "",            // String value.
+                         nullptr,       // Const string value.
+                         0,             // Integer value.
+                         0,             // Float value.
+                         nullptr,       // Array value.
+                         nullptr,       // Dictionary value.
+                         nullptr);      // Stream value.
+    }
+  }
+  {
+    // Array of array.
+    CPDF_Array* vals[3];
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < 3; ++i) {
+      vals[i] = new CPDF_Array;
+      for (size_t j = 0; j < 3; ++j) {
+        int value = j + 100;
+        vals[i]->InsertAt(i, new CPDF_Number(value));
+      }
+      arr->InsertAt(i, vals[i]);
+    }
+    for (size_t i = 0; i < 3; ++i) {
+      TestArrayAccessors(arr.get(), i,  // Array and index.
+                         "",            // String value.
+                         nullptr,       // Const string value.
+                         0,             // Integer value.
+                         0,             // Float value.
+                         vals[i],       // Array value.
+                         nullptr,       // Dictionary value.
+                         nullptr);      // Stream value.
+    }
+  }
+  {
+    // Dictionary array.
+    CPDF_Dictionary* vals[3];
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < 3; ++i) {
+      vals[i] = new CPDF_Dictionary;
+      for (size_t j = 0; j < 3; ++j) {
+        std::string key("key");
+        char buf[33];
+        key.append(FXSYS_itoa(j, buf, 10));
+        int value = j + 200;
+        vals[i]->SetAt(CFX_ByteStringC(key.c_str()), new CPDF_Number(value));
+      }
+      arr->InsertAt(i, vals[i]);
+    }
+    for (size_t i = 0; i < 3; ++i) {
+      TestArrayAccessors(arr.get(), i,  // Array and index.
+                         "",            // String value.
+                         nullptr,       // Const string value.
+                         0,             // Integer value.
+                         0,             // Float value.
+                         nullptr,       // Array value.
+                         vals[i],       // Dictionary value.
+                         nullptr);      // Stream value.
+    }
+  }
+  {
+    // Stream array.
+    CPDF_Dictionary* vals[3];
+    CPDF_Stream* stream_vals[3];
+    ScopedArray arr(new CPDF_Array);
+    for (size_t i = 0; i < 3; ++i) {
+      vals[i] = new CPDF_Dictionary;
+      for (size_t j = 0; j < 3; ++j) {
+        std::string key("key");
+        char buf[33];
+        key.append(FXSYS_itoa(j, buf, 10));
+        int value = j + 200;
+        vals[i]->SetAt(CFX_ByteStringC(key.c_str()), new CPDF_Number(value));
+      }
+      uint8_t content[] = "content: this is a stream";
+      size_t data_size = FX_ArraySize(content);
+      uint8_t* data = reinterpret_cast<uint8_t*>(malloc(data_size));
+      memcpy(data, content, data_size);
+      stream_vals[i] = new CPDF_Stream(data, data_size, vals[i]);
+      arr->InsertAt(i, stream_vals[i]);
+    }
+    for (size_t i = 0; i < 3; ++i) {
+      TestArrayAccessors(arr.get(), i,     // Array and index.
+                         "",               // String value.
+                         nullptr,          // Const string value.
+                         0,                // Integer value.
+                         0,                // Float value.
+                         nullptr,          // Array value.
+                         vals[i],          // Dictionary value.
+                         stream_vals[i]);  // Stream value.
+    }
+  }
+  {
+    // Mixed array.
+    ScopedArray arr(new CPDF_Array);
+    // Array arr will take ownership of all the objects inserted.
+    arr->InsertAt(0, new CPDF_Boolean(true));
+    arr->InsertAt(1, new CPDF_Boolean(false));
+    arr->InsertAt(2, new CPDF_Number(0));
+    arr->InsertAt(3, new CPDF_Number(-1234));
+    arr->InsertAt(4, new CPDF_Number(2345.0f));
+    arr->InsertAt(5, new CPDF_Number(0.05f));
+    arr->InsertAt(6, new CPDF_String("", false));
+    arr->InsertAt(7, new CPDF_String("It is a test!", false));
+    arr->InsertAt(8, new CPDF_Name("NAME"));
+    arr->InsertAt(9, new CPDF_Name("test"));
+    arr->InsertAt(10, new CPDF_Null());
+    CPDF_Array* arr_val = new CPDF_Array;
+    arr_val->AddNumber(1);
+    arr_val->AddNumber(2);
+    arr->InsertAt(11, arr_val);
+    CPDF_Dictionary* dict_val = new CPDF_Dictionary;
+    dict_val->SetAt("key1", new CPDF_String("Linda", false));
+    dict_val->SetAt("key2", new CPDF_String("Zoe", false));
+    arr->InsertAt(12, dict_val);
+    CPDF_Dictionary* stream_dict = new CPDF_Dictionary;
+    stream_dict->SetAt("key1", new CPDF_String("John", false));
+    stream_dict->SetAt("key2", new CPDF_String("King", false));
+    uint8_t data[] = "A stream for test";
+    // The data buffer will be owned by stream object, so it needs to be
+    // dynamically allocated.
+    size_t buf_size = sizeof(data);
+    uint8_t* buf = reinterpret_cast<uint8_t*>(malloc(buf_size));
+    memcpy(buf, data, buf_size);
+    CPDF_Stream* stream_val = new CPDF_Stream(buf, buf_size, stream_dict);
+    arr->InsertAt(13, stream_val);
+    const char* const expected_str[] = {
+        "true",          "false", "0",    "-1234", "2345", "0.05", "",
+        "It is a test!", "NAME",  "test", "",      "",     "",     ""};
+    const char* const expected_cstr[] = {
+        nullptr,         nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+        "It is a test!", "NAME",  "test",  nullptr, nullptr, nullptr, nullptr};
+    const int expected_int[] = {1, 0, 0, -1234, 2345, 0, 0,
+                                0, 0, 0, 0,     0,    0, 0};
+    const float expected_float[] = {0, 0, 0, -1234, 2345, 0.05f, 0,
+                                    0, 0, 0, 0,     0,    0,     0};
+    for (size_t i = 0; i < arr->GetCount(); ++i) {
+      EXPECT_STREQ(expected_str[i], arr->GetStringAt(i).c_str());
+      EXPECT_STREQ(expected_cstr[i], arr->GetConstStringAt(i).GetCStr());
+      EXPECT_EQ(expected_int[i], arr->GetIntegerAt(i));
+      EXPECT_EQ(expected_float[i], arr->GetNumberAt(i));
+      EXPECT_EQ(expected_float[i], arr->GetFloatAt(i));
+      if (i == 11)
+        EXPECT_EQ(arr_val, arr->GetArrayAt(i));
+      else
+        EXPECT_EQ(nullptr, arr->GetArrayAt(i));
+      if (i == 13) {
+        EXPECT_EQ(stream_dict, arr->GetDictAt(i));
+        EXPECT_EQ(stream_val, arr->GetStreamAt(i));
+      } else {
+        EXPECT_EQ(nullptr, arr->GetStreamAt(i));
+        if (i == 12)
+          EXPECT_EQ(dict_val, arr->GetDictAt(i));
+        else
+          EXPECT_EQ(nullptr, arr->GetDictAt(i));
+      }
+    }
+  }
+}
+
+TEST(PDFArrayTest, AddNumber) {
+  float vals[] = {1.0f,         -1.0f, 0,    0.456734f,
+                  12345.54321f, 0.5f,  1000, 0.000045f};
+  ScopedArray arr(new CPDF_Array);
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i)
+    arr->AddNumber(vals[i]);
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+    EXPECT_EQ(CPDF_Object::NUMBER, arr->GetElement(i)->GetType());
+    EXPECT_EQ(vals[i], arr->GetElement(i)->GetNumber());
+  }
+}
+
+TEST(PDFArrayTest, AddInteger) {
+  int vals[] = {0, 1, 934435456, 876, 10000, -1, -24354656, -100};
+  ScopedArray arr(new CPDF_Array);
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i)
+    arr->AddInteger(vals[i]);
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+    EXPECT_EQ(CPDF_Object::NUMBER, arr->GetElement(i)->GetType());
+    EXPECT_EQ(vals[i], arr->GetElement(i)->GetNumber());
+  }
+}
+
+TEST(PDFArrayTest, AddStringAndName) {
+  const char* vals[] = {"",        "a", "ehjhRIOYTTFdfcdnv",  "122323",
+                        "$#%^&**", " ", "This is a test.\r\n"};
+  ScopedArray string_array(new CPDF_Array);
+  ScopedArray name_array(new CPDF_Array);
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+    string_array->AddString(vals[i]);
+    name_array->AddName(vals[i]);
+  }
+  for (size_t i = 0; i < FX_ArraySize(vals); ++i) {
+    EXPECT_EQ(CPDF_Object::STRING, string_array->GetElement(i)->GetType());
+    EXPECT_STREQ(vals[i], string_array->GetElement(i)->GetString().c_str());
+    EXPECT_EQ(CPDF_Object::NAME, name_array->GetElement(i)->GetType());
+    EXPECT_STREQ(vals[i], name_array->GetElement(i)->GetString().c_str());
+  }
+}
+
+TEST(PDFArrayTest, AddReferenceAndGetElement) {
+  std::unique_ptr<CPDF_IndirectObjectHolder> holder(
+      new CPDF_IndirectObjectHolder(nullptr));
+  CPDF_Boolean* boolean_obj = new CPDF_Boolean(true);
+  CPDF_Number* int_obj = new CPDF_Number(-1234);
+  CPDF_Number* float_obj = new CPDF_Number(2345.089f);
+  CPDF_String* str_obj = new CPDF_String("Adsfdsf 343434 %&&*\n", false);
+  CPDF_Name* name_obj = new CPDF_Name("Title:");
+  CPDF_Null* null_obj = new CPDF_Null();
+  CPDF_Object* indirect_objs[] = {boolean_obj, int_obj,  float_obj,
+                                  str_obj,     name_obj, null_obj};
+  unsigned int obj_nums[] = {2, 4, 7, 2345, 799887, 1};
+  ScopedArray arr(new CPDF_Array);
+  ScopedArray arr1(new CPDF_Array);
+  // Create two arrays of references by different AddReference() APIs.
+  for (size_t i = 0; i < FX_ArraySize(indirect_objs); ++i) {
+    // All the indirect objects inserted will be owned by holder.
+    holder->InsertIndirectObject(obj_nums[i], indirect_objs[i]);
+    arr->AddReference(holder.get(), obj_nums[i]);
+    arr1->AddReference(holder.get(), indirect_objs[i]);
+  }
+  // Check indirect objects.
+  for (size_t i = 0; i < FX_ArraySize(obj_nums); ++i)
+    EXPECT_EQ(indirect_objs[i], holder->GetIndirectObject(obj_nums[i]));
+  // Check arrays.
+  EXPECT_EQ(arr->GetCount(), arr1->GetCount());
+  for (size_t i = 0; i < arr->GetCount(); ++i) {
+    EXPECT_EQ(CPDF_Object::REFERENCE, arr->GetElement(i)->GetType());
+    EXPECT_EQ(indirect_objs[i], arr->GetElement(i)->GetDirect());
+    EXPECT_EQ(indirect_objs[i], arr->GetElementValue(i));
+    EXPECT_EQ(CPDF_Object::REFERENCE, arr1->GetElement(i)->GetType());
+    EXPECT_EQ(indirect_objs[i], arr1->GetElement(i)->GetDirect());
+    EXPECT_EQ(indirect_objs[i], arr1->GetElementValue(i));
   }
 }