def test_funcdef(self):
assert parse("function() x") == ast.Block(
[ast.Function(formals=ast.FormalList(), body=ast.Symbol("x"))])
assert parse("function(x) x") == ast.Block([
ast.Function(formals=ast.FormalList([(ast.Symbol("x"), None)]),
body=ast.Symbol("x"))
])
assert parse("function(x) { x + 3 }") == ast.Block([
ast.Function(formals=ast.FormalList([(ast.Symbol("x"), None)]),
body=ast.Block([
ast.BinaryOperation(
"+", ast.Symbol("x"),
ast.Vector([ast.FloatValue(3.)]))
]))
])
assert parse("function(x, y=0) { x + y }") == ast.Block([
ast.Function(formals=ast.FormalList([
(ast.Symbol("x"), None),
(ast.Symbol("y"), ast.Vector([ast.FloatValue(0.)]))
]),
body=ast.Block([
ast.BinaryOperation("+", ast.Symbol("x"),
ast.Symbol("y"))
]))
])
def test_assignment(self):
assert parse("a = 123") == ast.Block(
[ast.Assign(ast.Symbol("a"), ast.Vector([ast.FloatValue(123.)]))])
assert parse("a <- 123") == ast.Block(
[ast.Assign(ast.Symbol("a"), ast.Vector([ast.FloatValue(123.)]))])
assert parse("123 -> a") == ast.Block(
[ast.Assign(ast.Symbol("a"), ast.Vector([ast.FloatValue(123.)]))])
def test_parses_block(self):
source = dedent("""\
{
"String literal"
}
""")
assert parse(source) == ast.Block(
[ast.Block([ast.Vector([ast.CharValue(u"String literal")])])])
def run(fp):
# type: (int) -> None
program = b""
while True:
read = os.read(fp, 4096)
if len(read) == 0:
break
program += read
os.close(fp)
lexer = blackbeard.lexer.Lexer(program, 1, {})
parser = blackbeard.parser.Parser(lexer)
result = parser.parse()
assert isinstance(result, blackbeard.ast.ASTNode)
print result.__repr__()
def test_constant(self):
assert parse("3") == ast.Block([ast.Vector([ast.FloatValue(3.)])])
assert parse("3e3") == ast.Block([ast.Vector([ast.FloatValue(3000.)])])
assert parse("5e-1") == ast.Block([ast.Vector([ast.FloatValue(0.5)])])
assert parse("NA") == ast.Block(
[ast.Vector([ast.BoolValue(False, na=True)])])
def test_unicode_symbol(self):
assert parse(u"👺 = 5".encode("utf-8")) == ast.Block([
ast.Assign(ast.Symbol(u"👺"), ast.Vector([ast.FloatValue(5.)]))
])
def test_unicode_string(self):
source = u'"👺"'
assert parse(source.encode("utf-8")) == ast.Block([
# strip quotes in a narrow-python friendly way
ast.Vector([ast.CharValue(source[1:-1])])
])
def test_binary_operation(self):
assert parse("a + b") == ast.Block(
[ast.BinaryOperation("+", ast.Symbol("a"), ast.Symbol("b"))])
def test_simple_exprs(self):
assert parse("(3)") == ast.Block([ast.Vector([ast.FloatValue(3.)])])
assert parse("3;;\n3") == ast.Block([
ast.Vector([ast.FloatValue(3.)]),
ast.Vector([ast.FloatValue(3.)])
])