Method testConstantNull

bolt/vector/tests/DecodedVectorTest.cpp:253–287

  }

  void testConstantNull(const TypePtr& type) {
    SCOPED_TRACE(type->toString());
    auto constantVector =
        BaseVector::createNullConstant(type, 100, pool_.get());
    EXPECT_EQ(constantVector->isScalar(), type->isPrimitiveType());

    auto check = [&](auto& decoded) {
      EXPECT_EQ(*decoded.base()->type(), *type);
      // Decoded vector doesn't ensure base() has "FLAT" encoding for primitive
      // types.
      if (!type->isPrimitiveType()) {
        EXPECT_EQ(
            decoded.base()->encoding(),
            BaseVector::create(type, 1, pool_.get())->encoding());
      }
      EXPECT_TRUE(decoded.isConstantMapping());
      EXPECT_TRUE(!decoded.isIdentityMapping());
      ASSERT_TRUE(decoded.nulls(nullptr) != nullptr);
      for (int32_t i = 0; i < 100; i++) {
        EXPECT_TRUE(decoded.isNullAt(i));
        EXPECT_TRUE(bits::isBitNull(decoded.nulls(nullptr), i));
      }
    };

    {
      SelectivityVector selection(100);
      DecodedVector decoded(*constantVector, selection);
      check(decoded);
    }

    {
      DecodedVector decoded(*constantVector);
      check(decoded);
    }
  }

  void testDictionaryOverConstant(const VectorPtr& base, vector_size_t index) {
    constexpr vector_size_t size = 1000;