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deps/rapidjson/test/unittest/filestreamtest.cpp

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+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#include "unittest.h"
+#include "rapidjson/filereadstream.h"
+#include "rapidjson/filewritestream.h"
+#include "rapidjson/encodedstream.h"
+
+using namespace rapidjson;
+
+class FileStreamTest : public ::testing::Test {
+public:
+    FileStreamTest() : filename_(), json_(), length_(), abcde_() {}
+    virtual ~FileStreamTest();
+
+    virtual void SetUp() {
+        const char *paths[] = {
+            "data/sample.json",
+            "bin/data/sample.json",
+            "../bin/data/sample.json",
+            "../../bin/data/sample.json",
+            "../../../bin/data/sample.json"
+        };
+        FILE* fp = 0;
+        for (size_t i = 0; i < sizeof(paths) / sizeof(paths[0]); i++) {
+            fp = fopen(paths[i], "rb");
+            if (fp) {
+                filename_ = paths[i];
+                break;
+            }
+        }
+        ASSERT_TRUE(fp != 0);
+
+        fseek(fp, 0, SEEK_END);
+        length_ = static_cast<size_t>(ftell(fp));
+        fseek(fp, 0, SEEK_SET);
+        json_ = static_cast<char*>(malloc(length_ + 1));
+        size_t readLength = fread(json_, 1, length_, fp);
+        json_[readLength] = '\0';
+        fclose(fp);
+
+        const char *abcde_paths[] = {
+            "data/abcde.txt",
+            "bin/data/abcde.txt",
+            "../bin/data/abcde.txt",
+            "../../bin/data/abcde.txt",
+            "../../../bin/data/abcde.txt"
+        };
+        fp = 0;
+        for (size_t i = 0; i < sizeof(abcde_paths) / sizeof(abcde_paths[0]); i++) {
+            fp = fopen(abcde_paths[i], "rb");
+            if (fp) {
+                abcde_ = abcde_paths[i];
+                break;
+            }
+        }
+        ASSERT_TRUE(fp != 0);
+        fclose(fp);
+    }
+
+    virtual void TearDown() {
+        free(json_);
+        json_ = 0;
+    }
+
+private:
+    FileStreamTest(const FileStreamTest&);
+    FileStreamTest& operator=(const FileStreamTest&);
+    
+protected:
+    const char* filename_;
+    char *json_;
+    size_t length_;
+    const char* abcde_;
+};
+
+FileStreamTest::~FileStreamTest() {}
+
+TEST_F(FileStreamTest, FileReadStream) {
+    FILE *fp = fopen(filename_, "rb");
+    ASSERT_TRUE(fp != 0);
+    char buffer[65536];
+    FileReadStream s(fp, buffer, sizeof(buffer));
+
+    for (size_t i = 0; i < length_; i++) {
+        EXPECT_EQ(json_[i], s.Peek());
+        EXPECT_EQ(json_[i], s.Peek());  // 2nd time should be the same
+        EXPECT_EQ(json_[i], s.Take());
+    }
+
+    EXPECT_EQ(length_, s.Tell());
+    EXPECT_EQ('\0', s.Peek());
+
+    fclose(fp);
+}
+
+TEST_F(FileStreamTest, FileReadStream_Peek4) {
+    FILE *fp = fopen(abcde_, "rb");
+    ASSERT_TRUE(fp != 0);
+    char buffer[4];
+    FileReadStream s(fp, buffer, sizeof(buffer));
+
+    const char* c = s.Peek4();
+    for (int i = 0; i < 4; i++)
+        EXPECT_EQ('a' + i, c[i]);
+    EXPECT_EQ(0u, s.Tell());
+
+    for (int i = 0; i < 5; i++) {
+        EXPECT_EQ(static_cast<size_t>(i), s.Tell());
+        EXPECT_EQ('a' + i, s.Peek());
+        EXPECT_EQ('a' + i, s.Peek());
+        EXPECT_EQ('a' + i, s.Take());
+    }
+    EXPECT_EQ(5u, s.Tell());
+    EXPECT_EQ(0, s.Peek());
+    EXPECT_EQ(0, s.Take());
+
+    fclose(fp);
+}
+
+TEST_F(FileStreamTest, FileWriteStream) {
+    char filename[L_tmpnam];
+    FILE* fp = TempFile(filename);
+
+    char buffer[65536];
+    FileWriteStream os(fp, buffer, sizeof(buffer));
+    for (size_t i = 0; i < length_; i++)
+        os.Put(json_[i]);
+    os.Flush();
+    fclose(fp);
+
+    // Read it back to verify
+    fp = fopen(filename, "rb");
+    FileReadStream is(fp, buffer, sizeof(buffer));
+
+    for (size_t i = 0; i < length_; i++)
+        EXPECT_EQ(json_[i], is.Take());
+
+    EXPECT_EQ(length_, is.Tell());
+    fclose(fp);
+
+    //std::cout << filename << std::endl;
+    remove(filename);
+}