Q-W1 pt1: extract core/json (json::Reader/Writer), collapse wire Cursor family into core/wire, shared readFileBytes — five JSON decoders and three cursor copies deleted, byte-identical formats, 59/59 green

tests/test_file_bytes.cpp

@@ -0,0 +1,51 @@
+// Standalone tests for reasampler::readFileBytes — no REAPER, no framework.
+// The ONE whole-file loader (Q-W1, T2-03) shared by both artifacts. Exercises
+// the three-way contract: exact bytes back, empty on a missing file, empty on
+// an empty file. Uses a scratch file in the test's working directory.
+
+#include "../src/core/util/file_bytes.h"
+
+#include <cstdio>
+#include <fstream>
+#include <string>
+#include <vector>
+
+using namespace reasampler;
+
+static int g_fail = 0;
+#define CHECK(cond) do { if(!(cond)) { \
+    std::printf("FAIL line %d: %s\n", __LINE__, #cond); ++g_fail; } } while(0)
+
+static const char* kScratch = "file_bytes_scratch.bin";
+
+static void testReadsExactBytesBack() {
+    // Binary content incl. NUL and 0xFF — the loader must be byte-transparent.
+    const std::vector<std::uint8_t> payload = {0x00, 0x01, 0xFF, 0x7E, 0x00, 0x0A};
+    {
+        std::ofstream f(kScratch, std::ios::binary | std::ios::trunc);
+        f.write(reinterpret_cast<const char*>(payload.data()),
+                static_cast<std::streamsize>(payload.size()));
+    }
+    CHECK(readFileBytes(kScratch) == payload);
+    std::remove(kScratch);
+}
+
+static void testMissingFileIsEmpty() {
+    CHECK(readFileBytes("no_such_file_anywhere.bin").empty());
+}
+
+static void testEmptyFileIsEmpty() {
+    { std::ofstream f(kScratch, std::ios::binary | std::ios::trunc); }
+    CHECK(readFileBytes(kScratch).empty());
+    std::remove(kScratch);
+}
+
+int main() {
+    testReadsExactBytesBack();
+    testMissingFileIsEmpty();
+    testEmptyFileIsEmpty();
+
+    if (g_fail == 0) std::printf("file_bytes: all tests passed\n");
+    else             std::printf("file_bytes: %d CHECK(s) FAILED\n", g_fail);
+    return g_fail == 0 ? 0 : 1;
+}