#include "io/gpr/IprHeader.hpp"
#include <gtest/gtest.h>
using geopro::io::gpr::parseIprHeader;
TEST(IprHeader, ParsesKeyFieldsFromRealSample) {
  const std::string t =
    "SAMPLES: 821\nLAST TRACE: 45305\nCHANNELS: 14\n"
    "TIMEWINDOW: 160.352\nSOIL VELOCITY: 100.000000\nDISTANCE INTERVAL: 0.049084\n";
  auto h = parseIprHeader(t);
  EXPECT_EQ(h.samples, 821);
  EXPECT_EQ(h.lastTrace, 45305);
  EXPECT_EQ(h.channels, 14);
  EXPECT_DOUBLE_EQ(h.timeWindowNs, 160.352);
  EXPECT_DOUBLE_EQ(h.soilVelocity, 1e8);      // 100 m/µs → 1e8 m/s
  EXPECT_NEAR(h.distanceInterval, 0.049084, 1e-9);
}
TEST(IprHeader, ThrowsOnMissingSamples) {
  EXPECT_THROW(parseIprHeader("CHANNELS: 14\n"), std::runtime_error);
}