// params = input1, input2, output, input1, input2, output, ...
svoid mapLike testFunctionValues_twoArgs_flat(O function, O... params) {
  for (int i = 0; i+2 < l(params); i += 3) {
    O a = params[i], b = params[i+1];
    O expected = params[i+2];
    print(function + "(" + a + ", " + b + "), expecting " + expected);
    assertEqualsVerbose(expected, callFWithVarArgs(function, a, b));
  }
}

svoid testFunctionValues_twoArgs_flat(IF2 function, O... params) {
  testFunctionValues_twoArgs_flat((O) function, params);
}

Began life as a copy of #1023865