def test_repetition_single_assignment_error():
"""
Test that plain assignment in repetition end up being a list in the model.
"""
grammar = r"""
Rep: many_a*=A;
A: 'A'
( ('b' '=' b=BOOL) |
('c' '=' c=C)
)*;
B: "b";
C: "c";
"""
mm = metamodel_from_str(grammar)
model = mm.model_from_str(" A c=c b=true ")
assert model.many_a[0].b == [True]
assert model.many_a[0].c == ["c"]
grammar = r"""
Rep: many_a*=A;
A: ( ('b' '=' b=BOOL) |
('c' '=' c=C)
)*;
B: "b";
C: "c";
"""
mm = metamodel_from_str(grammar)
model = mm.model_from_str(" c=c b=true ")
assert model.many_a[0].b == [True]
assert model.many_a[0].c == ["c"]
def test_user_classes_callable():
"""
See metamodel.md, "Custom classes"
See issue270
"""
# fix/works (no unused user classes):
mm = metamodel_from_str(grammar, classes=[Sender, Receiver])
_ = mm.model_from_str(modelstring)
# fix/works (no unused user classes; see grammar_with_baseclass_fix):
mm = metamodel_from_str(grammar_with_baseclass_fix,
classes=[ConnectionHandler, Sender, Receiver])
_ = mm.model_from_str(modelstring)
# does not work
with raises(TextXSemanticError,
match="ConnectionHandler class is not used in the grammar"):
_ = metamodel_from_str(grammar,
classes=[ConnectionHandler, Sender, Receiver])
# does work (allow unused user classes by providing a callable instead of
# a list of classes: the callable returns a user class for a given rule name
# or None)
def class_provider(name):
classes = [ConnectionHandler, Sender, Receiver]
classes = dict(map(lambda x: (x.__name__, x), classes))
return classes.get(name)
mm = metamodel_from_str(grammar, classes=class_provider)
m = mm.model_from_str(modelstring)
for s in m.sender:
assert isinstance(s, Sender)
for r in m.receiver:
assert isinstance(r, Receiver)
def test_match_rule_suppress():
"""
Test suppressing operator in match rules.
"""
grammar = """
FullyQualifiedID[noskipws]:
/\s*/-
QuotedID+['.']
/\s*/-
;
QuotedID:
'"'?- ID '"'?-
;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('''
first."second".third."fourth"
''')
assert model == 'first.second.third.fourth'
# Checking suppress rule reference
grammar = """
First: 'a' Second- Third;
Second: 'b';
Third: Second;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('a b b')
# Second b should be suppressed
assert model == 'ab'
def test_match_rule_suppress():
"""
Test suppressing operator in match rules.
"""
grammar = """
FullyQualifiedID[noskipws]:
/\s*/-
QuotedID+['.']
/\s*/-
;
QuotedID:
'"'?- ID '"'?-
;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('''
first."second".third."fourth"
''')
assert model == 'first.second.third.fourth'
# Checking suppress rule reference
grammar = """
First: 'a' Second- Third;
Second: 'b';
Third: Second;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('a b b')
# Second b should be suppressed
assert model == 'ab'
def test_modifier_separator_optional():
model = """
Rule:
("a"|"b")?[','];
"""
with pytest.raises(TextXSyntaxError):
# Modifiers are not possible for ? operator
metamodel_from_str(model)
def test_modifier_separator_optional():
model = """
Rule:
("a"|"b")?[','];
"""
with pytest.raises(TextXSyntaxError):
# Modifiers are not possible for ? operator
metamodel_from_str(model)
def test_assignment_modifier_separator_optional():
model = """
Rule:
a?=AorB[','];
AorB:
"a"|"b";
"""
with pytest.raises(TextXSyntaxError):
metamodel_from_str(model)
def test_assignment_modifier_separator_plain():
"""
Modifiers are not allowed for plain assignment.
"""
model = """
Rule:
a=AorB[','];
AorB:
"a"|"b";
"""
with pytest.raises(TextXSyntaxError):
metamodel_from_str(model)
def test_assignment_modifier_separator_plain():
"""
Modifiers are not allowed for plain assignment.
"""
model = """
Rule:
a=AorB[','];
AorB:
"a"|"b";
"""
with pytest.raises(TextXSyntaxError):
metamodel_from_str(model)
def test_ignore_case():
langdef = """
Model: 'start' rules*='first' 'second';
"""
meta = metamodel_from_str(langdef)
# By default case is not ignored.
with pytest.raises(TextXSyntaxError):
meta.model_from_str('Start first First Second')
meta = metamodel_from_str(langdef, ignore_case=True)
meta.model_from_str('Start first First Second')
def test_skipws():
langdef = """
Model: 'start' rules*='first' 'second';
"""
meta = metamodel_from_str(langdef)
# By default ws are skipped.
meta.model_from_str('start first first second')
meta = metamodel_from_str(langdef, skipws=False)
with pytest.raises(TextXSyntaxError):
meta.model_from_str('start first first second')
meta.model_from_str('startfirstfirstsecond')
def test_repetition_separator_modifier():
"""
Match list with regex separator.
"""
grammar = """
Model: 'start' attr+=Rule[/,|;/]; // Here a regex match is used to
// define , or ; as a separator
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start 34, "foo"; ident')
assert model
assert model.attr
assert model.attr[0].a == 34
assert model.attr[1].b == "foo"
assert model.attr[2].c == "ident"
assert model.attr[0].__class__.__name__ == 'Rule1'
assert model.attr[1].__class__.__name__ == 'Rule2'
assert model.attr[2].__class__.__name__ == 'Rule3'
# There must be at least one Rule matched after 'start'
with pytest.raises(TextXSyntaxError):
model = meta.model_from_str('start')
assert model
def test_assignment_optional():
grammar = """
Model: 'start' (attr=Rule)?; // There should be at most one Rule
// after 'start'
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start')
assert model
model = meta.model_from_str('start 34')
assert model
assert model.attr
assert model.attr.a == 34
assert model.attr.__class__.__name__ == 'Rule1'
# There must be at most one Rule matched after 'start'
with pytest.raises(TextXSyntaxError):
model = meta.model_from_str('start 34 "foo"')
assert model
def test_assignment_zeroormore():
grammar = """
Model: 'start' attr*=Rule; // There should be zero or more Rule-s after
// 'start'
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start 34 "foo"')
assert model
assert model.attr
assert model.attr[0].a == 34
assert model.attr[1].b == "foo"
assert model.attr[0].__class__.__name__ == 'Rule1'
assert model.attr[1].__class__.__name__ == 'Rule2'
model = meta.model_from_str('start')
assert model
def test_float_int_number():
"""
Test that numbers are recognized correctly.
"""
grammar = """
Rule:
a=NUMBER
b=INT
c=FLOAT
;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('3.4 5 .3')
assert model.a == 3.4
assert type(model.a) is float
assert model.b == 5
assert model.c == 0.3
model = meta.model_from_str('3 5 2.0')
assert model.a == 3
# NUMBER type always convert to python float
assert type(model.a) is float
assert model.b == 5
assert model.c == 2
assert type(model.c) is float
def test_basetype():
"""
Test that basetype will match each type properly.
"""
grammar = """
Rule:
a1=BASETYPE
a2=BASETYPE
a3=BASETYPE
a4=BASETYPE
b=BASETYPE
c=BASETYPE
d=BASETYPE
e=BASETYPE
;
"""
meta = metamodel_from_str(grammar)
assert meta
assert meta['Rule']._tx_type is RULE_NORMAL
model = meta.model_from_str('False false true True 0 4.5 "string" some_id')
assert model.a1 is False
assert model.a2 is False
assert model.a3 is True
assert model.a4 is True
assert model.b == 0.0
assert model.c == 4.5
assert model.d == "string"
assert model.e == "some_id"
def test_all_basetypes():
"""
Test that base types are matched properly.
"""
grammar = """
Rule:
a=FLOAT
b=INT
c1=BOOL
c2=BOOL
d1=STRING
d2=STRING
e=ID
;
"""
meta = metamodel_from_str(grammar)
assert meta
assert meta['Rule']._tx_type is RULE_NORMAL
model = meta.model_from_str('3.4 5 true 0 "some string" '
'\'some other string\' some_id')
assert model.a == 3.4
assert model.b == 5
assert model.c1 is True
assert model.c2 is False
assert model.d1 == "some string"
assert model.d2 == "some other string"
assert model.e == "some_id"
def test_object_processors():
"""
Test that object processors are called.
They should be called after each model object construction.
"""
call_order = []
def first_obj_processor(first):
first._first_called = True
call_order.append(1)
def second_obj_processor(second):
second._second_called = True
call_order.append(2)
# test that parent is fully initialised.
# b should be True
assert second.parent.b
obj_processors = {
'First': first_obj_processor,
'Second': second_obj_processor,
}
metamodel = metamodel_from_str(grammar)
metamodel.register_obj_processors(obj_processors)
model_str = 'first 34 45 7 A 45 65 B true C "dfdf"'
first = metamodel.model_from_str(model_str)
assert hasattr(first, '_first_called')
for s in first.seconds:
assert hasattr(s, '_second_called')
assert call_order == [2, 2, 2, 1]
def main(debug=False):
calc_mm = metamodel_from_str(
grammar,
classes=[Calc, Expression, Term, Factor, Operand],
debug=debug)
this_folder = dirname(__file__)
if debug:
metamodel_export(calc_mm, join(this_folder, 'calc_metamodel.dot'))
input_expr = '''
a = 10;
b = 2 * a + 17;
-(4-1)*a+(2+4.67)+b*5.89/(.2+7)
'''
model = calc_mm.model_from_str(input_expr)
if debug:
model_export(model, join(this_folder, 'calc_model.dot'))
# Getting value property from the Calc instance will start evaluation.
result = model.value
assert (model.value - 6.93805555) < 0.0001
print("Result is", result)
def test_bool_match():
grammar = """
Model: 'start' rule?='rule' rule2?=Rule; // rule and rule2 attr should be
Rule: Rule1|Rule2|Rule3; // true where match succeeds
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start rule 34')
assert model
assert hasattr(model, 'rule')
assert hasattr(model, 'rule2')
assert model.rule is True
assert model.rule2 is True
model = meta.model_from_str('start 34')
assert model.rule is False
assert model.rule2 is True
model = meta.model_from_str('start')
assert model.rule is False
assert model.rule2 is False
def test_ws():
langdef = """
Model: 'start' rules*='first' 'second';
"""
meta = metamodel_from_str(langdef)
# Default ws are space, tab and newline
meta.model_from_str("""start first
first second""")
meta = metamodel_from_str(langdef, ws=' ')
with pytest.raises(TextXSyntaxError):
meta.model_from_str("""start first
first second""")
meta.model_from_str('start first first second')
def test_abstract_rule_and_object_reference():
grammar = """
Model: 'start' rules*=RuleA 'ref' ref=[RuleA];
RuleA: Rule1|Rule2;
Rule1: RuleI|RuleE;
Rule2: 'r2' name=ID;
RuleI: 'rI' name=ID;
RuleE: 'rE' name=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'RuleA', 'Rule1', 'Rule2', 'RuleI', 'RuleE'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start r2 rule1 rE rule2 ref rule2')
assert model
assert hasattr(model, 'rules')
assert hasattr(model, 'ref')
assert model.rules
assert model.ref
# Reference to first rule
assert model.ref is model.rules[1]
assert model.ref.__class__.__name__ == "RuleE"
def test_syntactic_predicate_not():
"""
Test negative lookahead using `not` syntactic predicate.
"""
grammar = """
Expression: Let | MyID | NUMBER;
Let:
'let'
expr+=Expression
'end'
;
Keyword: 'let' | 'end';
MyID: !Keyword ID;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str("""
let let let 34 end let foo end end end
""")
assert model
assert len(model.expr) == 1
assert model.expr[0].expr[0].expr[0] == 34
assert model.expr[0].expr[1].expr[0] == 'foo'
def test_match_complex_recursive_peg_rule_resolve():
"""
Test that recursive match rules are properly resolved.
"""
grammar = """
calc: expression;
factor: INT | ('(' expression ')');
term: factor (term_op factor)*;
term_op: '*' | '/';
expression: term (expr_op term)*;
expr_op: '+' | '-';
"""
metamodel = metamodel_from_str(grammar)
assert metamodel.parser.parser_model.nodes[0].rule_name == 'expression'
assert type(metamodel.parser.parser_model.nodes[0]) is Sequence
calc_rule = metamodel['calc']._tx_peg_rule
expression_rule = metamodel['expression']._tx_peg_rule
assert calc_rule is expression_rule
assert type(calc_rule) is Sequence
assert type(metamodel['term_op']._tx_peg_rule) is OrderedChoice
# Recursive factor rule
factor_rule = metamodel['factor']._tx_peg_rule
# Find expression reference
expr_ref = factor_rule.nodes[1].nodes[1]
assert expr_ref.rule_name == 'expression'
assert type(expr_ref) is Sequence
assert expr_ref is expression_rule
def xtest_issue206_regex_reference1():
mm = metamodel_from_str('''
Word: ('bar' /[ ]*/)*;
''', skipws=False, debug=False)
m = mm.model_from_str('''bar bar''', debug=False)
assert m is not None
def test_sequence_ordered_choice():
"""
Test ordered choice of sequences.
"""
grammar = """
Model:
('first' a=INT b?='a_is_here')|
('second' c=INT d?='c_is_here')|
(e=RuleA)
'END'
;
RuleA: 'rule' name=ID;
"""
meta = metamodel_from_str(grammar, debug=True)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'RuleA'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('first 23 a_is_here END')
assert model.a == 23
assert model.c == 0
assert model.b is True
assert model.d is False
model = meta.model_from_str('second 32 END')
assert model.a == 0
assert model.c == 32
assert model.b is False
assert model.d is False
model = meta.model_from_str('rule A END')
assert model.a == 0
assert model.c == 0
assert model.b is False
assert model.d is False
def main(debug=False):
bool_mm = metamodel_from_str(grammar,
classes=[Bool, Or, And, Not, Operand],
ignore_case=True,
debug=debug)
this_folder = dirname(__file__)
if debug:
metamodel_export(bool_mm, join(this_folder, 'bool_metamodel.dot'))
input_expr = '''
a = true;
b = not a and true;
a and false or not b
'''
model = bool_mm.model_from_str(input_expr)
if debug:
model_export(model, join(this_folder, 'bool_model.dot'))
# Getting value property from the Bool instance will start evaluation.
result = model.value
assert model.value is True
print("Result is", result)
def test_model_root():
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str(model_str)
t = model.a[0].y
assert model_root(t) is model
def test_all_basetypes():
"""
Test that base types are matched properly.
"""
grammar = """
Rule:
a=FLOAT
b=INT
c1=BOOL
c2=BOOL
d1=STRING
d2=STRING
e=ID
;
"""
meta = metamodel_from_str(grammar)
assert meta
assert meta['Rule']._tx_type is RULE_COMMON
assert meta['BASETYPE']._tx_type is RULE_MATCH
assert meta['NUMBER']._tx_type is RULE_MATCH
assert meta['INT']._tx_type is RULE_MATCH
assert meta['FLOAT']._tx_type is RULE_MATCH
assert meta['STRING']._tx_type is RULE_MATCH
assert meta['BOOL']._tx_type is RULE_MATCH
model = meta.model_from_str('3.4 5 true 0 "some string" '
'\'some other string\' some_id')
assert model.a == 3.4
assert model.b == 5
assert model.c1 is True
assert model.c2 is False
assert model.d1 == "some string"
assert model.d2 == "some other string"
assert model.e == "some_id"
def test_multiple_modifiers():
"""
Multiple modifier may be specified separated with space.
"""
model = """
Rule:
'first'
INT+[eolterm ','] '123456';
"""
metamodel = metamodel_from_str(model)
# After 'first' and before newline must
# be one or more integers separated with comma
with pytest.raises(TextXSyntaxError):
model = metamodel.model_from_str("""
first
34 56 88 65
123456
""")
# When newline is found matching integers
# finishes and than a '123456' is matched
model = metamodel.model_from_str("""
first 34, 56, 88, 65
123456
""")
assert model
def test_no_import_for_string():
"""
Test that import can't be used if meta-model is loaded from string.
"""
grammar = """
import relativeimport.first
Second:
a = First
;
"""
with pytest.raises(AssertionError):
metamodel_from_str(grammar)
def test_bool_match():
grammar = """
Model: 'start' rule?='rule' rule2?=Rule; // rule and rule2 attr should be
Rule: Rule1|Rule2|Rule3; // true where match succeeds
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('start rule 34')
assert model
assert hasattr(model, 'rule')
assert hasattr(model, 'rule2')
assert model.rule is True
assert model.rule2 is True
model = meta.model_from_str('start 34')
assert model.rule is False
assert model.rule2 is True
model = meta.model_from_str('start')
assert model.rule is False
assert model.rule2 is False
def test_assignment_oneoormore():
grammar = """
Model: 'start' attr+=Rule; // There should be at least one Rule
// after 'start'
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(BASE_TYPE_NAMES))
model = meta.model_from_str('start 34 "foo"')
assert model
assert model.attr
assert model.attr[0].a == 34
assert model.attr[1].b == "foo"
assert model.attr[0].__class__.__name__ == 'Rule1'
assert model.attr[1].__class__.__name__ == 'Rule2'
# There must be at least one Rule matched after 'start'
with pytest.raises(TextXSyntaxError):
model = meta.model_from_str('start')
assert model
def test_modifier_separator_unordered_group_with_optionals():
model = """
Rule:
("a" "b"? "c")#[','];
"""
metamodel = metamodel_from_str(model)
model = metamodel.model_from_str("a, b, c")
assert model
model = metamodel.model_from_str("c, a")
assert model
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str("a, c b")
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str("a, c, ")
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str("a, c, a, b")
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str(",a, c, b")
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str("a, c, b, ")
with pytest.raises(TextXSyntaxError):
metamodel.model_from_str("a, c, ,b ")
def test_textx_metaclass_repr():
"""
Test metaclass __repr__
"""
metamodel = metamodel_from_str(grammar)
assert '<textx:First class at' in repr(metamodel['First'])
def test_json_issue():
"""
Test wrong rule type in json grammar.
"""
grammar = """
File:
Array | Object
;
Array:
"[" values*=Value[','] "]"
;
Value:
STRING | FLOAT | BOOL | Object | Array | "null"
;
Object:
"{" members*=Member[','] "}"
;
Member:
key=STRING ':' value=Value
;
"""
json_mm = metamodel_from_str(grammar)
assert json_mm['Object']._tx_type is RULE_COMMON
assert json_mm['Member']._tx_type is RULE_COMMON
assert json_mm['Array']._tx_type is RULE_COMMON
assert json_mm['File']._tx_type is RULE_ABSTRACT
assert json_mm['Value']._tx_type is RULE_ABSTRACT
def test_syntactic_predicate_not():
"""
Test negative lookahead using `not` syntactic predicate.
"""
grammar = """
Expression: Let | MyID | NUMBER;
Let:
'let'
expr+=Expression
'end'
;
Keyword: 'let' | 'end';
MyID: !Keyword ID;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str("""
let let let 34 end let foo end end end
""")
assert model
assert len(model.expr) == 1
assert model.expr[0].expr[0].expr[0] == 34
assert model.expr[0].expr[1].expr[0] == 'foo'
def test_basetype():
"""
Test that basetype will match each type properly.
"""
grammar = """
Rule:
a1=BASETYPE
a2=BASETYPE
a3=BASETYPE
a4=BASETYPE
b=BASETYPE
c=BASETYPE
d=BASETYPE
e=BASETYPE
;
"""
meta = metamodel_from_str(grammar)
assert meta
assert meta['Rule']._tx_type is RULE_COMMON
model = meta.model_from_str('False false true True 0 4.5 "string" some_id')
assert model.a1 is False
assert model.a2 is False
assert model.a3 is True
assert model.a4 is True
assert model.b == 0.0
assert model.c == 4.5
assert model.d == "string"
assert model.e == "some_id"
def test_repetition_separator_modifier():
"""
Match list with regex separator.
"""
grammar = """
Model: 'start' attr+=Rule[/,|;/]; // Here a regex match is used to
// define , or ; as a separator
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == set(['Model', 'Rule', 'Rule1',
'Rule2', 'Rule3'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('start 34, "foo"; ident')
assert model
assert model.attr
assert model.attr[0].a == 34
assert model.attr[1].b == "foo"
assert model.attr[2].c == "ident"
assert model.attr[0].__class__.__name__ == 'Rule1'
assert model.attr[1].__class__.__name__ == 'Rule2'
assert model.attr[2].__class__.__name__ == 'Rule3'
# There must be at least one Rule matched after 'start'
with pytest.raises(TextXSyntaxError):
model = meta.model_from_str('start')
assert model
def test_assignment_multiple_simple():
"""
Test that multiple assignments to the same attribute will result in the
list of values.
"""
grammar = """
Model: 'start' a=INT a=INT (a=INT)?;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('start 34 23 45')
assert meta['Model']._tx_attrs['a'].cls.__name__ == 'INT'
assert meta['Model']._tx_attrs['a'].mult == '1..*'
assert meta['Model']._tx_attrs['a'].cont
assert not meta['Model']._tx_attrs['a'].ref
assert model
assert model.a
assert type(model.a) is list
assert len(model.a) == 3
assert model.a == [34, 23, 45]
model = meta.model_from_str('start 34 23')
assert model.a == [34, 23]
def test_assignment_optional():
grammar = """
Model: 'start' (attr=Rule)?; // There should be at most one Rule
// after 'start'
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('start')
assert model
model = meta.model_from_str('start 34')
assert model
assert model.attr
assert model.attr.a == 34
assert model.attr.__class__.__name__ == 'Rule1'
# There must be at most one Rule matched after 'start'
with pytest.raises(TextXSyntaxError):
model = meta.model_from_str('start 34 "foo"')
assert model
def test_float_int_number():
"""
Test that numbers are recognized correctly.
"""
grammar = """
Rule:
a=NUMBER
b=INT
c=FLOAT
;
"""
meta = metamodel_from_str(grammar)
model = meta.model_from_str('3.4 5 .3')
assert model.a == 3.4
assert type(model.a) is float
assert model.b == 5
assert model.c == 0.3
model = meta.model_from_str('3 5 2.0')
assert model.a == 3
# NUMBER type always convert to python float
assert type(model.a) is float
assert model.b == 5
assert model.c == 2
assert type(model.c) is float
def test_assignment_zeroormore():
grammar = """
Model: 'start' attr*=Rule; // There should be zero or more Rule-s after
// 'start'
Rule: Rule1|Rule2|Rule3;
Rule1: a=INT;
Rule2: b=STRING;
Rule3: c=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'Rule', 'Rule1', 'Rule2', 'Rule3'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('start 34 "foo"')
assert model
assert model.attr
assert model.attr[0].a == 34
assert model.attr[1].b == "foo"
assert model.attr[0].__class__.__name__ == 'Rule1'
assert model.attr[1].__class__.__name__ == 'Rule2'
model = meta.model_from_str('start')
assert model
def main(debug=False):
calc_mm = metamodel_from_str(grammar,
classes=[Calc, Expression, Term, Factor,
Operand],
debug=debug)
this_folder = dirname(__file__)
if debug:
metamodel_export(calc_mm, join(this_folder, 'calc_metamodel.dot'))
input_expr = '''
a = 10;
b = 2 * a + 17;
-(4-1)*a+(2+4.67)+b*5.89/(.2+7)
'''
model = calc_mm.model_from_str(input_expr)
if debug:
model_export(model, join(this_folder, 'calc_model.dot'))
# Getting value property from the Calc instance will start evaluation.
result = model.value
assert (model.value - 6.93805555) < 0.0001
print("Result is", result)
def test_sequence_ordered_choice():
"""
Test ordered choice of sequences.
"""
grammar = """
Model:
('first' a=INT b?='a_is_here' |
'second' c=INT d?='c_is_here' |
e=RuleA)
'END'
;
RuleA: 'rule' name=ID;
"""
meta = metamodel_from_str(grammar, debug=True)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'RuleA'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('first 23 a_is_here END')
assert model.a == 23
assert model.c == 0
assert model.b is True
assert model.d is False
model = meta.model_from_str('second 32 END')
assert model.a == 0
assert model.c == 32
assert model.b is False
assert model.d is False
model = meta.model_from_str('rule A END')
assert model.a == 0
assert model.c == 0
assert model.b is False
assert model.d is False
def test_multiple_modifiers():
"""
Multiple modifier may be specified separated with space.
"""
model = """
Rule:
'first'
INT+[eolterm ','] '123456';
"""
metamodel = metamodel_from_str(model)
# After 'first' and before newline must
# be one or more integers separated with comma
with pytest.raises(TextXSyntaxError):
model = metamodel.model_from_str("""
first
34 56 88 65
123456
""")
# When newline is found matching integers
# finishes and than a '123456' is matched
model = metamodel.model_from_str("""
first 34, 56, 88, 65
123456
""")
assert model
def test_abstract_rule_and_object_reference():
grammar = """
Model: 'start' rules*=RuleA 'ref' ref=[RuleA];
RuleA: Rule1|Rule2;
Rule1: RuleI|RuleE;
Rule2: 'r2' name=ID;
RuleI: 'rI' name=ID;
RuleE: 'rE' name=ID;
"""
meta = metamodel_from_str(grammar)
assert meta
assert set([x.__name__ for x in meta]) == \
set(['Model', 'RuleA', 'Rule1', 'Rule2', 'RuleI', 'RuleE'])\
.union(set(ALL_TYPE_NAMES))
model = meta.model_from_str('start r2 rule1 rE rule2 ref rule2')
assert model
assert hasattr(model, 'rules')
assert hasattr(model, 'ref')
assert model.rules
assert model.ref
# Reference to first rule
assert model.ref is model.rules[1]
assert model.ref.__class__.__name__ == "RuleE"
def test_repeat_rule_ref():
grammar = """
Rule: ID*;
"""
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str("""first second third""")
assert model
def test_textx_metaclass_instance_repr():
"""
Test metaclass instance __repr__
"""
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str('first 42')
assert '<textx:First instance at' in repr(model)
def test_repeat_strmatch_with_separator():
grammar = """
Rule: "first"*[','];
"""
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str("""first, first""")
assert model
def test_repeat_strmatch():
grammar = """
Rule: "first"*;
"""
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str("""first first""")
assert model
def test_repeat_strmatch():
grammar = """
Rule: "first"*;
"""
metamodel = metamodel_from_str(grammar)
model = metamodel.model_from_str("""first first""")
assert metamodel['Rule']._tx_type is RULE_MATCH
assert model == 'firstfirst'
def test_repeat_strmatch_with_separator():
grammar = """
Rule: "first"*[','];
"""
metamodel = metamodel_from_str(grammar)
assert metamodel['Rule']._tx_type is RULE_MATCH
model = metamodel.model_from_str("""first, first""")
assert model == 'first,first'
def test_modifier_separator_zeroormore():
model = """
Rule:
("a"|"b")*[','];
"""
metamodel = metamodel_from_str(model)
model = metamodel.model_from_str("a,b, a, b")
assert model