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package engine
import (
"context"
"testing"
)
// TestArithmeticWithFunctions tests arithmetic operations with function calls
// This validates the complete AST parser and evaluation system for column-level calculations
func TestArithmeticWithFunctions(t *testing.T) {
engine := NewTestSQLEngine()
testCases := []struct {
name string
sql string
expected string
desc string
}{
{
name: "Simple function arithmetic",
sql: "SELECT LENGTH('hello') + 10 FROM user_events LIMIT 1",
expected: "15",
desc: "Basic function call with addition",
},
{
name: "Nested functions with arithmetic",
sql: "SELECT length(trim(' hello world ')) + 12 FROM user_events LIMIT 1",
expected: "23",
desc: "Complex nested functions with arithmetic operation (user's original failing query)",
},
{
name: "Function subtraction",
sql: "SELECT LENGTH('programming') - 5 FROM user_events LIMIT 1",
expected: "6",
desc: "Function call with subtraction",
},
{
name: "Function multiplication",
sql: "SELECT LENGTH('test') * 3 FROM user_events LIMIT 1",
expected: "12",
desc: "Function call with multiplication",
},
{
name: "Multiple nested functions",
sql: "SELECT LENGTH(UPPER(TRIM(' hello '))) FROM user_events LIMIT 1",
expected: "5",
desc: "Triple nested functions",
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
result, err := engine.ExecuteSQL(context.Background(), tc.sql)
if err != nil {
t.Errorf("Query failed: %v", err)
return
}
if result.Error != nil {
t.Errorf("Query result error: %v", result.Error)
return
}
if len(result.Rows) == 0 {
t.Error("Expected at least one row")
return
}
actual := result.Rows[0][0].ToString()
if actual != tc.expected {
t.Errorf("%s: Expected '%s', got '%s'", tc.desc, tc.expected, actual)
} else {
t.Logf("PASS %s: %s → %s", tc.desc, tc.sql, actual)
}
})
}
}
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