TEST() and code in same file - Test Fail

01sqrt_fail.cpp

#include <iostream>
#include <gtest/gtest.h>

double squareroot (double) {
  return 0;
};

TEST (SquareRootTest, PositiveNos) { 
  EXPECT_EQ (18.0, squareroot (324.0));
  EXPECT_EQ (25.4, squareroot (645.16));
  EXPECT_EQ (50.332, squareroot (2533.310224));
}
 
TEST (SquareRootTest, ZeroAndNegativeNos) { 
  ASSERT_EQ (0.0, squareroot (0.0));
  ASSERT_EQ (-1, squareroot (-22.0));
}

int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}