Add unit tests for ascii85 and hex decoders.

core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/include/fpdfapi/fpdf_parser.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "testing/test_support.h"
+
+TEST(fpdf_parser_decode, A85Decode) {
+  pdfium::DecodeTestData test_data[] = {
+      // Empty src string.
+      DECODE_TEST_CASE("", "", 0),
+      // Empty content in src string.
+      DECODE_TEST_CASE("~>", "", 0),
+      // Regular conversion.
+      DECODE_TEST_CASE("FCfN8~>", "test", 7),
+      // End at the ending mark.
+      DECODE_TEST_CASE("FCfN8~>FCfN8", "test", 7),
+      // Skip whitespaces.
+      DECODE_TEST_CASE("\t F C\r\n \tf N 8 ~>", "test", 17),
+      // No ending mark.
+      DECODE_TEST_CASE("@3B0)DJj_BF*)>@Gp#-s", "a funny story :)", 20),
+      // Non-multiple length.
+      DECODE_TEST_CASE("12A", "2k", 3),
+      // Stop at unknown characters.
+      DECODE_TEST_CASE("FCfN8FCfN8vw", "testtest", 11),
+  };
+  for (size_t i = 0; i < FX_ArraySize(test_data); ++i) {
+    pdfium::DecodeTestData* ptr = &test_data[i];
+    uint8_t* result = nullptr;
+    FX_DWORD result_size;
+    EXPECT_EQ(ptr->processed_size,
+              A85Decode(ptr->input, ptr->input_size, result, result_size))
+        << "for case " << i;
+    EXPECT_EQ(ptr->expected_size, result_size);

[Lei Zhang, 2016/02/05 01:25:34]

ASSERT_EQ() or we may get out of bound access below. Ditto on line 70.

[Wei Li, 2016/02/06 00:11:44]

Done.

+    for (size_t j = 0; j < result_size; ++j) {
+      EXPECT_EQ(ptr->expected[j], result[j]) << "for case " << i << " char "
+                                             << j;
+    }
+    FX_Free(result);
+  }
+}
 
 TEST(fpdf_parser_decode, HexDecode) {
-  {
-    // Empty src string.
-    uint8_t* dest = nullptr;
-    FX_DWORD dest_size;
-    uint8_t src[] = "";
-    EXPECT_EQ(0, HexDecode(src, 0, dest, dest_size));
-    EXPECT_EQ(0, dest_size);
-    EXPECT_EQ('\0', dest[0]);
-    FX_Free(dest);
-  }
-
-  {
-    // Regular conversion.
-    uint8_t* dest = nullptr;
-    FX_DWORD dest_size;
-    uint8_t src[] = "12Ac>zzz";
-    EXPECT_EQ(5, HexDecode(src, 8, dest, dest_size));
-    EXPECT_EQ(2, dest_size);
-    EXPECT_EQ(18, dest[0]);
-    EXPECT_EQ(172, dest[1]);
-    FX_Free(dest);
-  }
-
-  {
-    // Non-multiple length.
-    uint8_t* dest = nullptr;
-    FX_DWORD dest_size;
-    uint8_t src[] = "12A>zzz";
-    EXPECT_EQ(4, HexDecode(src, 8, dest, dest_size));
-    EXPECT_EQ(2, dest_size);
-    EXPECT_EQ(18, dest[0]);
-    EXPECT_EQ(160, dest[1]);
-    FX_Free(dest);
-  }
-
-  {
-    // Skips unknown characters.
-    uint8_t* dest = nullptr;
-    FX_DWORD dest_size;
-    uint8_t src[] = "12tk  \tAc>zzz";
-    EXPECT_EQ(10, HexDecode(src, 13, dest, dest_size));
-    EXPECT_EQ(2, dest_size);
-    EXPECT_EQ(18, dest[0]);
-    EXPECT_EQ(172, dest[1]);
-    FX_Free(dest);
+  pdfium::DecodeTestData test_data[] = {
+      // Empty src string.
+      DECODE_TEST_CASE("", "", 0),
+      // Empty content in src string.
+      DECODE_TEST_CASE(">", "", 1),
+      // Only whitespaces in src string.
+      DECODE_TEST_CASE("\t   \r\n>", "", 7),
+      // Regular conversion.
+      DECODE_TEST_CASE("12Ac>zzz", "\x12\xac", 5),
+      // Skip whitespaces.
+      DECODE_TEST_CASE("12 Ac\t02\r\nBF>zzz>", "\x12\xac\x02\xbf", 13),
+      // Non-multiple length.
+      DECODE_TEST_CASE("12A>zzz", "\x12\xa0", 4),
+      // Skips unknown characters.
+      DECODE_TEST_CASE("12tk  \tAc>zzz", "\x12\xac", 10),
+      // No ending mark.
+      DECODE_TEST_CASE("12AcED3c3456", "\x12\xac\xed\x3c\x34\x56", 12),
+  };
+  for (size_t i = 0; i < FX_ArraySize(test_data); ++i) {
+    pdfium::DecodeTestData* ptr = &test_data[i];
+    uint8_t* result = nullptr;
+    FX_DWORD result_size;
+    EXPECT_EQ(ptr->processed_size,
+              HexDecode(ptr->input, ptr->input_size, result, result_size))
+        << "for case " << i;
+    EXPECT_EQ(ptr->expected_size, result_size);
+    for (size_t j = 0; j < result_size; ++j) {
+      EXPECT_EQ(ptr->expected[j], result[j]) << "for case " << i << " char "
+                                             << j;
+    }
+    FX_Free(result);
   }
 }