#!/usr/bin/env tclsh

set sqlite_exec [expr {[info exists env(SQLITE_EXEC)] ? $env(SQLITE_EXEC) : "sqlite3"}]

proc evaluate_sql {sqlite_exec sql} {
    set command [list $sqlite_exec testing/testing.db $sql]
    set output [exec {*}$command]
    return $output
}

proc run_test {sqlite_exec sql expected_output} {
    set actual_output [evaluate_sql $sqlite_exec $sql]
    if {$actual_output ne $expected_output} {
        puts "Test FAILED: '$sql' returned '$actual_output'"
        exit 1
    }
}

proc do_execsql_test {test_name sql_statements expected_outputs} {
    puts "Running test: $test_name"
    set combined_sql [join $sql_statements " "]
    set combined_expected_output [join $expected_outputs "\n"]
    run_test $::sqlite_exec $combined_sql $combined_expected_output
}

do_execsql_test select-const-1 {
  SELECT 1
} {1}

do_execsql_test select-const-2 {
  SELECT 2
} {2}

do_execsql_test select-avg {
  SELECT avg(age) FROM users;
} {50.4649}

do_execsql_test select-sum {
  SELECT sum(age) FROM users;
} {504649}

do_execsql_test select-limit {
  SELECT id FROM users LIMIT 1;
} {1}

do_execsql_test select-count {
  SELECT count(id) FROM users;
} {10000}

do_execsql_test select-max {
  SELECT max(age) FROM users;
} {100}

do_execsql_test select-limit-0 {
  SELECT id FROM users LIMIT 0;
} {}

do_execsql_test pragma-cache-size {
  PRAGMA cache_size
} {-2000}