Function ValidateLayout

be/src/exprs/expr-test.cc:9129–9153

Validates that the constructor ScalarExprsResultsRowLayout() for 'exprs' is correct. - expected_byte_size: total byte size to store all results for exprs - expected_var_begin: byte offset where variable length types begin - expected_offsets: mapping of byte sizes to a set valid offsets exprs that have the same byte size can end up in a number of locations

//   - expected_offsets: mapping of byte sizes to a set valid offsets
//     exprs that have the same byte size can end up in a number of locations
void ValidateLayout(const vector<ScalarExpr*>& exprs, int expected_byte_size,
    int expected_var_begin, const map<int, set<int>>& expected_offsets) {
  set<int> offsets_found;

  ScalarExprsResultsRowLayout row_layout(exprs);

  EXPECT_EQ(expected_byte_size, row_layout.expr_values_bytes_per_row);
  EXPECT_EQ(expected_var_begin, row_layout.var_results_begin_offset);

  // Walk the computed offsets and make sure the resulting sets match expected_offsets
  for (int i = 0; i < exprs.size(); ++i) {
    int expr_byte_size = exprs[i]->type().GetByteSize();
    map<int, set<int>>::const_iterator iter = expected_offsets.find(expr_byte_size);
    EXPECT_TRUE(iter != expected_offsets.end());

    const set<int>& possible_offsets = iter->second;
    int computed_offset = row_layout.expr_values_offsets[i];
    // The computed offset has to be one of the possible.  Exprs types with the
    // same size are not ordered wrt each other.
    EXPECT_TRUE(possible_offsets.find(computed_offset) != possible_offsets.end());
    // The offset should not have been found before
    EXPECT_TRUE(offsets_found.find(computed_offset) == offsets_found.end());
    offsets_found.insert(computed_offset);
  }
}

TEST_P(ExprTest, ResultsLayoutTest) {
  vector<ScalarExpr*> exprs;