Modern C++ Programming with Test-Driven Development

8.14 Spying to Sense Using a Member Variable

We decide we want to first ensure that the code properly calculates ​totalSeconds​, a value sent to the descriptor. (We might not need to add this test if we’re not going to make changes to ​writeSnippet​ . The test exists here to demonstrate a specific technique.)

TEST_GROUP(WavReader_WriteSnippet) {
   WavReader reader{"",""};
   istringstream input{""};
   FormatSubchunk formatSubchunk;
   ostringstream output;
   DataChunk dataChunk;
   char* data;
   uint32_t TwoBytesWorthOfBits{2 * 8};

   void setup() override {
      data = new char[4];
   }

   void teardown() override {
      delete[] data;
   }
};

TEST(WavReader_WriteSnippet, UpdatesTotalSeconds) {
 dataChunk.length ...