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# frozen_string_literal: true
require "test_helper"
class ExpressionTest < Minitest::Test
def test_constant_literals
assert_equal(true, Liquid::C::Expression.strict_parse("true"))
assert_equal(false, Liquid::C::Expression.strict_parse("false"))
assert_nil(Liquid::C::Expression.strict_parse("nil"))
assert_nil(Liquid::C::Expression.strict_parse("null"))
empty = Liquid::C::Expression.strict_parse("empty")
assert_equal("", empty)
assert_same(empty, Liquid::C::Expression.strict_parse("blank"))
end
def test_push_literals
assert_nil(compile_and_eval("nil"))
assert_equal(true, compile_and_eval("true"))
assert_equal(false, compile_and_eval("false"))
end
def test_constant_integer
assert_equal(42, Liquid::C::Expression.strict_parse("42"))
end
def test_push_int8
assert_equal(127, compile_and_eval("127"))
assert_equal(-128, compile_and_eval("-128"))
end
def test_push_int16
assert_equal(128, compile_and_eval("128"))
assert_equal(-129, compile_and_eval("-129"))
assert_equal(32767, compile_and_eval("32767"))
assert_equal(-32768, compile_and_eval("-32768"))
end
def test_push_large_fixnum
assert_equal(32768, compile_and_eval("32768"))
assert_equal(-2147483648, compile_and_eval("-2147483648"))
assert_equal(2147483648, compile_and_eval("2147483648"))
assert_equal(4611686018427387903, compile_and_eval("4611686018427387903"))
end
def test_push_big_int
num = 1 << 128
assert_equal(num, compile_and_eval(num.to_s))
end
def test_float
assert_equal(123.4, Liquid::C::Expression.strict_parse("123.4"))
assert_equal(-1.5, compile_and_eval("-1.5"))
end
def test_string
assert_equal("hello", Liquid::C::Expression.strict_parse('"hello"'))
assert_equal("world", compile_and_eval("'world'"))
end
def test_find_static_variable
context = Liquid::Context.new({ "x" => 123 })
expr = Liquid::C::Expression.strict_parse("x")
assert_instance_of(Liquid::C::Expression, expr)
assert_equal(123, context.evaluate(expr))
end
def test_find_dynamic_variable
context = Liquid::Context.new({ "x" => "y", "y" => 42 })
expr = Liquid::C::Expression.strict_parse("[x]")
assert_equal(42, context.evaluate(expr))
end
def test_find_missing_variable
context = Liquid::Context.new({})
expr = Liquid::C::Expression.strict_parse("missing")
assert_nil(context.evaluate(expr))
context.strict_variables = true
assert_raises(Liquid::UndefinedVariable) do
context.evaluate(expr)
end
end
def test_lookup_const_key
context = Liquid::Context.new({ "obj" => { "prop" => "some value" } })
expr = Liquid::C::Expression.strict_parse("obj.prop")
assert_equal("some value", context.evaluate(expr))
expr = Liquid::C::Expression.strict_parse('obj["prop"]')
assert_equal("some value", context.evaluate(expr))
end
def test_lookup_variable_key
context = Liquid::Context.new({ "field_name" => "prop", "obj" => { "prop" => "another value" } })
expr = Liquid::C::Expression.strict_parse("obj[field_name]")
assert_equal("another value", context.evaluate(expr))
end
def test_lookup_command
context = Liquid::Context.new({ "ary" => ["a", "b", "c"] })
assert_equal(3, context.evaluate(Liquid::C::Expression.strict_parse("ary.size")))
assert_equal("a", context.evaluate(Liquid::C::Expression.strict_parse("ary.first")))
assert_equal("c", context.evaluate(Liquid::C::Expression.strict_parse("ary.last")))
end
def test_lookup_missing_key
context = Liquid::Context.new({ "obj" => {} })
expr = Liquid::C::Expression.strict_parse("obj.missing")
assert_nil(context.evaluate(expr))
context.strict_variables = true
assert_raises(Liquid::UndefinedVariable) do
context.evaluate(expr)
end
end
def test_lookup_on_var_with_literal_name
context = Liquid::Context.new({ "blank" => { "x" => "result" } })
assert_equal("result", context.evaluate(Liquid::C::Expression.strict_parse("blank.x")))
assert_equal("result", context.evaluate(Liquid::C::Expression.strict_parse('blank["x"]')))
end
def test_const_range
assert_equal((1..2), Liquid::C::Expression.strict_parse("(1..2)"))
end
def test_dynamic_range
context = Liquid::Context.new({ "var" => 42 })
expr = Liquid::C::Expression.strict_parse("(1..var)")
assert_instance_of(Liquid::C::Expression, expr)
assert_equal((1..42), context.evaluate(expr))
end
def test_disassemble
expression = Liquid::C::Expression.strict_parse("foo.bar[123]")
assert_equal(<<~ASM, expression.disassemble)
0x0000: find_static_var("foo")
0x0003: lookup_const_key("bar")
0x0006: push_int8(123)
0x0008: lookup_key
0x0009: leave
ASM
end
def test_disassemble_int16
assert_equal(<<~ASM, Liquid::C::Expression.strict_parse("[12345]").disassemble)
0x0000: push_int16(12345)
0x0003: find_var
0x0004: leave
ASM
end
def test_disable_c_nodes
context = Liquid::Context.new({ "x" => 123, "y" => { 123 => 42 } })
expr = Liquid::ParseContext.new.parse_expression("x")
assert_instance_of(Liquid::C::Expression, expr)
assert_equal(123, context.evaluate(expr))
expr = Liquid::ParseContext.new(disable_liquid_c_nodes: true).parse_expression("x")
assert_instance_of(Liquid::VariableLookup, expr)
assert_equal(123, context.evaluate(expr))
expr = Liquid::ParseContext.new(disable_liquid_c_nodes: true).parse_expression("y[x]")
assert_instance_of(Liquid::VariableLookup, expr)
assert_instance_of(Liquid::VariableLookup, expr.lookups.first)
assert_equal(42, context.evaluate(expr))
end
private
class ReturnKeyDrop < Liquid::Drop
def liquid_method_missing(key)
key
end
end
def compile_and_eval(source)
context = Liquid::Context.new({ "ret_key" => ReturnKeyDrop.new })
expr = Liquid::C::Expression.strict_parse("ret_key[#{source}]")
context.evaluate(expr)
end
end
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