Backfill some FX String unit tests for == and !=.

core/src/fxcrt/fx_basic_wstring_unittest.cpp

 // Copyright 2014 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 "testing/gtest/include/gtest/gtest.h"
 #include "../../../testing/fx_string_testhelpers.h"
 #include "../../include/fxcrt/fx_basic.h"
 
 TEST(fxcrt, WideStringOperatorSubscript) {
     // CFX_WideString includes the NUL terminator for non-empty strings.
@@ skipping 27 matching lines @@
     EXPECT_TRUE(a < abc);
     EXPECT_FALSE(abc < a);
 
     EXPECT_TRUE(a < def);
     EXPECT_FALSE(def < a);
 
     EXPECT_TRUE(abc < def);
     EXPECT_FALSE(def < abc);
 }
 
+TEST(fxcrt, WideStringOperatorEQ) {
+    CFX_WideString wideString(L"hello");
+    ASSERT_TRUE(wideString == wideString);
+
+    CFX_WideString wideStringSame1(L"hello");
+    ASSERT_TRUE(wideString == wideStringSame1);
+    ASSERT_TRUE(wideStringSame1 == wideString);
+
+    CFX_WideString wideStringSame2(wideString);
+    ASSERT_TRUE(wideString == wideStringSame2);
+    ASSERT_TRUE(wideStringSame2 == wideString);
+
+    CFX_WideString wideString1(L"he");
+    CFX_WideString wideString2(L"hellp");
+    CFX_WideString wideString3(L"hellod");
+    ASSERT_FALSE(wideString == wideString1);
+    ASSERT_FALSE(wideString == wideString2);
+    ASSERT_FALSE(wideString == wideString3);
+    ASSERT_FALSE(wideString1 == wideString);
+    ASSERT_FALSE(wideString2 == wideString);
+    ASSERT_FALSE(wideString3 == wideString);
+
+    CFX_WideStringC wideStringCSame1(L"hello");
+    ASSERT_TRUE(wideString == wideStringCSame1);
+    ASSERT_TRUE(wideStringCSame1 == wideString);
+
+    CFX_WideStringC wideStringC1(L"he");
+    CFX_WideStringC wideStringC2(L"hellp");
+    CFX_WideStringC wideStringC3(L"hellod");
+    ASSERT_FALSE(wideString == wideStringC1);
+    ASSERT_FALSE(wideString == wideStringC2);
+    ASSERT_FALSE(wideString == wideStringC3);
+    ASSERT_FALSE(wideStringC1 == wideString);
+    ASSERT_FALSE(wideStringC2 == wideString);
+    ASSERT_FALSE(wideStringC3 == wideString);
+
+    const wchar_t* cStringSame1 = L"hello";
+    ASSERT_TRUE(wideString == cStringSame1);
+#if 0
+    // TODO(tsepez): Missing operator - there's a prototype but no actual
+    // implementation (at least we already removed implicit c_str() casting).
+    ASSERT_TRUE(cStringSame1 == wideString);
+#endif
+
+    const wchar_t* cString1 = L"he";
+    const wchar_t* cString2 = L"hellp";
+    const wchar_t* cString3 = L"hellod";
+    ASSERT_FALSE(wideString == cString1);
+    ASSERT_FALSE(wideString == cString2);
+    ASSERT_FALSE(wideString == cString3);
+#if 0
+    // See above TODO.
+    ASSERT_FALSE(cString1 == wideString);
+    ASSERT_FALSE(cString2 == wideString);
+    ASSERT_FALSE(cString3 == wideString);
+#endif
+}
+
+TEST(fxcrt, WideStringOperatorNE) {
+    CFX_WideString wideString(L"hello");
+    ASSERT_FALSE(wideString != wideString);
+
+    CFX_WideString wideStringSame1(L"hello");
+    ASSERT_FALSE(wideString != wideStringSame1);
+    ASSERT_FALSE(wideStringSame1 != wideString);
+
+    CFX_WideString wideStringSame2(wideString);
+    ASSERT_FALSE(wideString != wideStringSame2);
+    ASSERT_FALSE(wideStringSame2 != wideString);
+
+    CFX_WideString wideString1(L"he");
+    CFX_WideString wideString2(L"hellp");
+    CFX_WideString wideString3(L"hellod");
+    ASSERT_TRUE(wideString != wideString1);
+    ASSERT_TRUE(wideString != wideString2);
+    ASSERT_TRUE(wideString != wideString3);
+    ASSERT_TRUE(wideString1 != wideString);
+    ASSERT_TRUE(wideString2 != wideString);
+    ASSERT_TRUE(wideString3 != wideString);
+
+    CFX_WideStringC wideStringCSame1(L"hello");
+    ASSERT_FALSE(wideString != wideStringCSame1);
+    ASSERT_FALSE(wideStringCSame1 != wideString);
+
+    CFX_WideStringC wideStringC1(L"he");
+    CFX_WideStringC wideStringC2(L"hellp");
+    CFX_WideStringC wideStringC3(L"hellod");
+    ASSERT_TRUE(wideString != wideStringC1);
+    ASSERT_TRUE(wideString != wideStringC2);
+    ASSERT_TRUE(wideString != wideStringC3);
+    ASSERT_TRUE(wideStringC1 != wideString);
+    ASSERT_TRUE(wideStringC2 != wideString);
+    ASSERT_TRUE(wideStringC3 != wideString);
+
+    const wchar_t* cStringSame1 = L"hello";
+    ASSERT_FALSE(wideString != cStringSame1);
+#if 0
+    // See above TODO.
+    ASSERT_FALSE(cStringSame1 != wideString);
+#endif
+    const wchar_t* cString1 = L"he";
+    const wchar_t* cString2 = L"hellp";
+    const wchar_t* cString3 = L"hellod";
+    ASSERT_TRUE(wideString != cString1);
+    ASSERT_TRUE(wideString != cString2);
+    ASSERT_TRUE(wideString != cString3);
+#if 0
+    // See above TODO.
+    ASSERT_TRUE(cString1 != wideString);
+    ASSERT_TRUE(cString2 != wideString);
+    ASSERT_TRUE(cString3 != wideString);
+#endif
+}
+
 #define ByteStringLiteral(str) CFX_ByteString(FX_BSTRC(str))
 
 TEST(fxcrt, WideStringUTF16LE_Encode) {
   struct UTF16LEEncodeCase {
     CFX_WideString ws;
     CFX_ByteString bs;
   } utf16le_encode_cases[] = {
     { L"", ByteStringLiteral("\0\0") },
     { L"abc", ByteStringLiteral("a\0b\0c\0\0\0") },
     { L"abcdef", ByteStringLiteral("a\0b\0c\0d\0e\0f\0\0\0") },
@@ skipping 41 matching lines @@
     EXPECT_TRUE(a < abc);
     EXPECT_FALSE(abc < a);
 
     EXPECT_TRUE(a < def);
     EXPECT_FALSE(def < a);
 
     EXPECT_TRUE(abc < def);
     EXPECT_FALSE(def < abc);
 }