mentat/query-algebrizer/tests/predicate.rs

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// Copyright 2016 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
extern crate mentat_core;
extern crate mentat_query;
extern crate mentat_query_algebrizer;
extern crate mentat_query_parser;
mod utils;
use mentat_core::{
Attribute,
DateTime,
Schema,
TypedValue,
Utc,
ValueType,
ValueTypeSet,
};
use mentat_query::{
Keyword,
PlainSymbol,
Variable,
};
use mentat_query_algebrizer::{
EmptyBecause,
ErrorKind,
Known,
QueryInputs,
};
use utils::{
add_attribute,
alg,
alg_with_inputs,
associate_ident,
bails,
};
fn prepopulated_schema() -> Schema {
let mut schema = Schema::default();
associate_ident(&mut schema, Keyword::namespaced("foo", "date"), 65);
associate_ident(&mut schema, Keyword::namespaced("foo", "double"), 66);
associate_ident(&mut schema, Keyword::namespaced("foo", "long"), 67);
add_attribute(&mut schema, 65, Attribute {
value_type: ValueType::Instant,
multival: false,
..Default::default()
});
add_attribute(&mut schema, 66, Attribute {
value_type: ValueType::Double,
multival: false,
..Default::default()
});
add_attribute(&mut schema, 67, Attribute {
value_type: ValueType::Long,
multival: false,
..Default::default()
});
schema
}
#[test]
fn test_instant_predicates_require_instants() {
let schema = prepopulated_schema();
let known = Known::for_schema(&schema);
// You can't use a string for an inequality: this is a straight-up error.
let query = r#"[:find ?e
:where
[?e :foo/date ?t]
[(> ?t "2017-06-16T00:56:41.257Z")]]"#;
match bails(known, query).0 {
ErrorKind::InvalidArgumentType(op, why, idx) => {
assert_eq!(op, PlainSymbol::plain(">"));
assert_eq!(why, ValueTypeSet::of_numeric_and_instant_types());
assert_eq!(idx, 1);
},
_ => panic!("Expected InvalidArgument."),
}
let query = r#"[:find ?e
:where
[?e :foo/date ?t]
[(> "2017-06-16T00:56:41.257Z", ?t)]]"#;
match bails(known, query).0 {
ErrorKind::InvalidArgumentType(op, why, idx) => {
assert_eq!(op, PlainSymbol::plain(">"));
assert_eq!(why, ValueTypeSet::of_numeric_and_instant_types());
assert_eq!(idx, 0); // We get this right.
},
_ => panic!("Expected InvalidArgument."),
}
// You can try using a number, which is valid input to a numeric predicate.
// In this store and query, though, that means we expect `?t` to be both
// an instant and a number, so the query is known-empty.
let query = r#"[:find ?e
:where
[?e :foo/date ?t]
[(> ?t 1234512345)]]"#;
let cc = alg(known, query);
assert!(cc.is_known_empty());
assert_eq!(cc.empty_because.unwrap(),
EmptyBecause::TypeMismatch {
var: Variable::from_valid_name("?t"),
existing: ValueTypeSet::of_one(ValueType::Instant),
desired: ValueTypeSet::of_numeric_types(),
});
// You can compare doubles to longs.
let query = r#"[:find ?e
:where
[?e :foo/double ?t]
[(< ?t 1234512345)]]"#;
let cc = alg(known, query);
assert!(!cc.is_known_empty());
assert_eq!(cc.known_type(&Variable::from_valid_name("?t")).expect("?t is known"),
ValueType::Double);
}
#[test]
fn test_instant_predicates_accepts_var() {
let schema = prepopulated_schema();
let known = Known::for_schema(&schema);
let instant_var = Variable::from_valid_name("?time");
let instant_value = TypedValue::Instant(DateTime::parse_from_rfc3339("2018-04-11T19:17:00.000Z")
.map(|t| t.with_timezone(&Utc))
.expect("expected valid date"));
let query = r#"[:find ?e
:in ?time
:where
[?e :foo/date ?t]
[(< ?t ?time)]]"#;
let cc = alg_with_inputs(known, query, QueryInputs::with_value_sequence(vec![(instant_var.clone(), instant_value.clone())]));
assert_eq!(cc.known_type(&instant_var).expect("?time is known"),
ValueType::Instant);
let query = r#"[:find ?e
:in ?time
:where
[?e :foo/date ?t]
[(> ?time, ?t)]]"#;
let cc = alg_with_inputs(known, query, QueryInputs::with_value_sequence(vec![(instant_var.clone(), instant_value.clone())]));
assert_eq!(cc.known_type(&instant_var).expect("?time is known"),
ValueType::Instant);
}
#[test]
fn test_numeric_predicates_accepts_var() {
let schema = prepopulated_schema();
let known = Known::for_schema(&schema);
let numeric_var = Variable::from_valid_name("?long");
let numeric_value = TypedValue::Long(1234567);
// You can't use a string for an inequality: this is a straight-up error.
let query = r#"[:find ?e
:in ?long
:where
[?e :foo/long ?t]
[(> ?t ?long)]]"#;
let cc = alg_with_inputs(known, query, QueryInputs::with_value_sequence(vec![(numeric_var.clone(), numeric_value.clone())]));
assert_eq!(cc.known_type(&numeric_var).expect("?long is known"),
ValueType::Long);
let query = r#"[:find ?e
:in ?long
:where
[?e :foo/long ?t]
[(> ?long, ?t)]]"#;
let cc = alg_with_inputs(known, query, QueryInputs::with_value_sequence(vec![(numeric_var.clone(), numeric_value.clone())]));
assert_eq!(cc.known_type(&numeric_var).expect("?long is known"),
ValueType::Long);
}