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#!/bin/sh
# This script is a smoke test for the basic functionality of the lua interpreter.
set -e
# Create a test lua file from a string of commands, run the lua interpreter on
# it, then compare the printed output to a given string.
#
# $1 - A string of lua commands to run that will be placed in test.lua
# $2 - The correct output that should be printed by the interpreter
test_lua_program() {
rm -f test.lua
printf "%s" "$1" > test.lua
test_output=$(lua test.lua)
if [ "$test_output" != "$2" ]; then
echo "Error: expected output of $2 but received $test_output"
exit 1
fi
}
# Check basic math and order of operations.
math_test="print(4 * (6 + 5) - 7)"
math_test_output="37"
test_lua_program "$math_test" "$math_test_output"
# Check variable assignment and string concatination.
var_test="x=10
y = 5
name = 'World!'
print('Hello ' .. name .. ' - ' .. x .. y)
print(x + y)"
var_test_output="Hello World! - 105
15"
test_lua_program "$var_test" "$var_test_output"
# Check recursion, function calls, loops, and branches.
recursion_test="
function print_dots(num)
for i=1,num do io.write('.') end
io.write('\n')
if num > 0 then print_dots(num - 1) end
end
print_dots(5)"
recursion_test_output=".....
....
...
..
."
test_lua_program "$recursion_test" "$recursion_test_output"
rm -f test.lua
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