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poyrazK merged 2 commits into from
Apr 23, 2026
Merged

test(query_executor): add GROUP BY tests #61

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test(query_executor): add GROUP BY tests
poyrazK Apr 23, 2026
5fbc580
style: automated clang-format fixes
poyrazK Apr 23, 2026
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96 changes: 96 additions & 0 deletions tests/query_executor_tests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -272,6 +272,102 @@ TEST_F(QueryExecutorTests, SelectWithGroupBy) {
const auto res = execute_sql(env.executor, "SELECT cat, SUM(val) FROM test_table GROUP BY cat");
EXPECT_TRUE(res.success());
EXPECT_EQ(res.row_count(), 2U);
// Verify actual aggregated values (A=30, B=5)
bool found_a = false, found_b = false;
for (size_t i = 0; i < res.row_count(); ++i) {
std::string cat_val = res.rows()[i].get(0).to_string();
int sum_val = std::stoi(res.rows()[i].get(1).to_string());
if (cat_val == "A") {
EXPECT_EQ(sum_val, 30);
found_a = true;
} else if (cat_val == "B") {
EXPECT_EQ(sum_val, 5);
found_b = true;
}
}
EXPECT_TRUE(found_a);
EXPECT_TRUE(found_b);
}

TEST_F(QueryExecutorTests, SelectWithGroupByCount) {
TestEnvironment env;
execute_sql(env.executor, "CREATE TABLE test_table (cat TEXT, val INT)");
execute_sql(env.executor, "INSERT INTO test_table VALUES ('A', 10), ('A', 20), ('B', 5)");
const auto res =
execute_sql(env.executor, "SELECT cat, COUNT(val) FROM test_table GROUP BY cat");
EXPECT_TRUE(res.success());
EXPECT_EQ(res.row_count(), 2U);
// Verify counts (A=2, B=1)
bool found_a = false, found_b = false;
for (size_t i = 0; i < res.row_count(); ++i) {
std::string cat_val = res.rows()[i].get(0).to_string();
int cnt_val = std::stoi(res.rows()[i].get(1).to_string());
if (cat_val == "A") {
EXPECT_EQ(cnt_val, 2);
found_a = true;
} else if (cat_val == "B") {
EXPECT_EQ(cnt_val, 1);
found_b = true;
}
}
EXPECT_TRUE(found_a);
EXPECT_TRUE(found_b);
}

TEST_F(QueryExecutorTests, SelectWithGroupByMinMax) {
TestEnvironment env;
execute_sql(env.executor, "CREATE TABLE test_table (cat TEXT, val INT)");
execute_sql(env.executor,
"INSERT INTO test_table VALUES ('A', 10), ('A', 20), ('B', 5), ('B', 15)");
const auto res =
execute_sql(env.executor, "SELECT cat, MIN(val), MAX(val) FROM test_table GROUP BY cat");
EXPECT_TRUE(res.success());
EXPECT_EQ(res.row_count(), 2U);
// Verify A: min=10, max=20; B: min=5, max=15
bool found_a = false, found_b = false;
for (size_t i = 0; i < res.row_count(); ++i) {
std::string cat_val = res.rows()[i].get(0).to_string();
int min_val = std::stoi(res.rows()[i].get(1).to_string());
int max_val = std::stoi(res.rows()[i].get(2).to_string());
if (cat_val == "A") {
EXPECT_EQ(min_val, 10);
EXPECT_EQ(max_val, 20);
found_a = true;
} else if (cat_val == "B") {
EXPECT_EQ(min_val, 5);
EXPECT_EQ(max_val, 15);
found_b = true;
}
}
EXPECT_TRUE(found_a);
EXPECT_TRUE(found_b);
}

TEST_F(QueryExecutorTests, SelectWithGroupByMultipleColumns) {
TestEnvironment env;
execute_sql(env.executor, "CREATE TABLE test_table (cat1 TEXT, cat2 TEXT, val INT)");
// 4 groups: (A,X), (A,Y), (B,X), (B,Y)
execute_sql(env.executor,
"INSERT INTO test_table VALUES ('A', 'X', 10), ('A', 'Y', 20), "
"('A', 'X', 5), ('A', 'Y', 15), ('B', 'X', 10), ('B', 'Y', 20)");
const auto res = execute_sql(env.executor,
"SELECT cat1, cat2, SUM(val) FROM test_table GROUP BY "
"cat1, cat2 ORDER BY cat1, cat2");
EXPECT_TRUE(res.success());
EXPECT_EQ(res.row_count(), 4U);
// Verify sums: (A,X)=15, (A,Y)=35, (B,X)=10, (B,Y)=20
EXPECT_STREQ(res.rows()[0].get(0).to_string().c_str(), "A");
EXPECT_STREQ(res.rows()[0].get(1).to_string().c_str(), "X");
EXPECT_EQ(std::stoi(res.rows()[0].get(2).to_string()), 15);
EXPECT_STREQ(res.rows()[1].get(0).to_string().c_str(), "A");
EXPECT_STREQ(res.rows()[1].get(1).to_string().c_str(), "Y");
EXPECT_EQ(std::stoi(res.rows()[1].get(2).to_string()), 35);
EXPECT_STREQ(res.rows()[2].get(0).to_string().c_str(), "B");
EXPECT_STREQ(res.rows()[2].get(1).to_string().c_str(), "X");
EXPECT_EQ(std::stoi(res.rows()[2].get(2).to_string()), 10);
EXPECT_STREQ(res.rows()[3].get(0).to_string().c_str(), "B");
EXPECT_STREQ(res.rows()[3].get(1).to_string().c_str(), "Y");
EXPECT_EQ(std::stoi(res.rows()[3].get(2).to_string()), 20);
}

TEST_F(QueryExecutorTests, SelectNonExistentTable) {
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