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package test
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/yyun543/minidb/internal/catalog"
"github.com/yyun543/minidb/internal/executor"
"github.com/yyun543/minidb/internal/optimizer"
"github.com/yyun543/minidb/internal/parser"
"github.com/yyun543/minidb/internal/session"
"github.com/yyun543/minidb/internal/storage"
)
// TestDeltaLakeACID tests ACID properties of Delta Lake implementation
func TestDeltaLakeACID(t *testing.T) {
// Setup test environment with cleanup
testDir := SetupTestDir(t, "delta_acid_test")
storageEngine, err := storage.NewParquetEngine(testDir)
assert.NoError(t, err)
defer storageEngine.Close()
err = storageEngine.Open()
assert.NoError(t, err)
cat := catalog.NewCatalog()
cat.SetStorageEngine(storageEngine)
err = cat.Init()
assert.NoError(t, err)
sessMgr, err := session.NewSessionManager()
assert.NoError(t, err)
sess := sessMgr.CreateSession()
opt := optimizer.NewOptimizer()
exec := executor.NewExecutor(cat)
// Create database
createDbSQL := "CREATE DATABASE acid_test"
stmt, err := parser.Parse(createDbSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
sess.CurrentDB = "acid_test"
// Test Atomicity: All or nothing
t.Run("Atomicity", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE accounts (id INTEGER, name VARCHAR, balance INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert initial data
insertSQL := "INSERT INTO accounts (id, name, balance) VALUES (1, 'Alice', 1000)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
insertSQL = "INSERT INTO accounts (id, name, balance) VALUES (2, 'Bob', 500)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Verify all inserts completed atomically
selectSQL := "SELECT * FROM accounts"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
assert.Equal(t, 2, len(result.Batches()), "Should have 2 records after atomic inserts")
})
// Test Consistency: Data integrity maintained
t.Run("Consistency", func(t *testing.T) {
// Create table with constraints (conceptual - we validate consistency through queries)
createSQL := "CREATE TABLE orders (order_id INTEGER, user_id INTEGER, amount INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert consistent data
for i := 1; i <= 5; i++ {
// Since we don't have parameterized queries, use direct values
stmt, err = parser.Parse("INSERT INTO orders VALUES (1, 1, 100)")
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
}
// Verify consistency - all records should exist
selectSQL := "SELECT * FROM orders"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Equal(t, 5, len(result.Batches()), "Should maintain consistency with all inserts")
})
// Test Isolation: Concurrent operations don't interfere
t.Run("Isolation", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE transactions (id INTEGER, amount INTEGER, timestamp VARCHAR)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Session 1: Insert data
sess1 := sessMgr.CreateSession()
sess1.CurrentDB = "acid_test"
insertSQL := "INSERT INTO transactions VALUES (1, 100, '2024-01-01')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess1)
assert.NoError(t, err)
// Session 2: Should see isolated view (snapshot isolation)
sess2 := sessMgr.CreateSession()
sess2.CurrentDB = "acid_test"
insertSQL = "INSERT INTO transactions VALUES (2, 200, '2024-01-02')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess2)
assert.NoError(t, err)
// Both sessions can read their own writes + committed data
selectSQL := "SELECT * FROM transactions"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess1)
assert.NoError(t, err)
assert.GreaterOrEqual(t, len(result.Batches()), 1, "Session 1 should see at least its own write")
result, err = exec.Execute(plan, sess2)
assert.NoError(t, err)
assert.GreaterOrEqual(t, len(result.Batches()), 1, "Session 2 should see at least its own write")
})
// Test Durability: Data persists after operations
t.Run("Durability", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE durable_data (id INTEGER, value VARCHAR)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert data
insertSQL := "INSERT INTO durable_data VALUES (1, 'persistent')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Verify data is immediately readable (durability)
selectSQL := "SELECT * FROM durable_data WHERE id = 1"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
assert.Equal(t, 1, len(result.Batches()), "Data should be durable and readable immediately")
// Data should persist across multiple queries
time.Sleep(100 * time.Millisecond)
result, err = exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Equal(t, 1, len(result.Batches()), "Data should remain durable over time")
})
// Test Delta Log versioning
t.Run("VersionControl", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE versioned (id INTEGER, value INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Multiple inserts create versions
for i := 1; i <= 3; i++ {
// Direct value insertion
stmt, err = parser.Parse("INSERT INTO versioned VALUES (1, 100)")
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Small delay to ensure different versions
time.Sleep(10 * time.Millisecond)
}
// Query should return all versions
selectSQL := "SELECT * FROM versioned"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Equal(t, 3, len(result.Batches()), "Should have 3 versions")
})
}
// TestDeltaLogSnapshot tests snapshot isolation
func TestDeltaLogSnapshot(t *testing.T) {
testDir := SetupTestDir(t, "delta_snapshot_test")
storageEngine, err := storage.NewParquetEngine(testDir)
assert.NoError(t, err)
defer storageEngine.Close()
err = storageEngine.Open()
assert.NoError(t, err)
cat := catalog.NewCatalog()
cat.SetStorageEngine(storageEngine)
err = cat.Init()
assert.NoError(t, err)
sessMgr, err := session.NewSessionManager()
assert.NoError(t, err)
sess := sessMgr.CreateSession()
opt := optimizer.NewOptimizer()
exec := executor.NewExecutor(cat)
// Create database and table
createDbSQL := "CREATE DATABASE snapshot_test"
stmt, err := parser.Parse(createDbSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
sess.CurrentDB = "snapshot_test"
createSQL := "CREATE TABLE events (id INTEGER, event VARCHAR, value INTEGER)"
stmt, err = parser.Parse(createSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
t.Run("SnapshotConsistency", func(t *testing.T) {
// Insert initial data
insertSQL := "INSERT INTO events VALUES (1, 'create', 100)"
stmt, err := parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Read should show consistent snapshot
selectSQL := "SELECT * FROM events"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result1, err := exec.Execute(plan, sess)
assert.NoError(t, err)
// Add more data
insertSQL = "INSERT INTO events VALUES (2, 'update', 200)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// New read should show updated snapshot - use SELECT query
selectSQL = "SELECT * FROM events"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result2, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Greater(t, len(result2.Batches()), len(result1.Batches()),
"New snapshot should include new data")
})
}