mentat/query-parser/tests/find_tests.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_query_parser;
extern crate mentat_query;
extern crate edn;
use edn::{
NamespacedKeyword,
PlainSymbol,
};
use mentat_query::{
Element,
FindSpec,
FnArg,
OrJoin,
OrWhereClause,
Pattern,
PatternNonValuePlace,
PatternValuePlace,
Predicate,
UnifyVars,
Variable,
WhereClause,
};
use mentat_query_parser::parse_find_string;
///! N.B., parsing a query can be done without reference to a DB.
///! Processing the parsed query into something we can work with
///! for planning involves interrogating the schema and idents in
///! the store.
///! See <https://github.com/mozilla/mentat/wiki/Querying> for more.
#[test]
fn can_parse_predicates() {
let s = "[:find [?x ...] :where [?x _ ?y] [(< ?y 10)]]";
let p = parse_find_string(s).unwrap();
assert_eq!(p.find_spec,
FindSpec::FindColl(Element::Variable(Variable(PlainSymbol::new("?x")))));
assert_eq!(p.where_clauses,
vec![
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::Variable(Variable(PlainSymbol::new("?y"))),
tx: PatternNonValuePlace::Placeholder,
}),
WhereClause::Pred(Predicate { operator: PlainSymbol::new("<"), args: vec![
FnArg::Variable(Variable(PlainSymbol::new("?y"))), FnArg::EntidOrInteger(10),
]}),
]);
}
#[test]
fn can_parse_simple_or() {
let s = "[:find ?x . :where (or [?x _ 10] [?x _ 15])]";
let p = parse_find_string(s).unwrap();
assert_eq!(p.find_spec,
FindSpec::FindScalar(Element::Variable(Variable(PlainSymbol::new("?x")))));
assert_eq!(p.where_clauses,
vec![
WhereClause::OrJoin(OrJoin {
unify_vars: UnifyVars::Implicit,
clauses: vec![
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(10),
tx: PatternNonValuePlace::Placeholder,
})),
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(15),
tx: PatternNonValuePlace::Placeholder,
})),
],
}),
]);
}
#[test]
fn can_parse_unit_or_join() {
let s = "[:find ?x . :where (or-join [?x] [?x _ 15])]";
let p = parse_find_string(s).unwrap();
assert_eq!(p.find_spec,
FindSpec::FindScalar(Element::Variable(Variable(PlainSymbol::new("?x")))));
assert_eq!(p.where_clauses,
vec![
WhereClause::OrJoin(OrJoin {
unify_vars: UnifyVars::Explicit(vec![Variable(PlainSymbol::new("?x"))]),
clauses: vec![
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(15),
tx: PatternNonValuePlace::Placeholder,
})),
],
}),
]);
}
#[test]
fn can_parse_simple_or_join() {
let s = "[:find ?x . :where (or-join [?x] [?x _ 10] [?x _ 15])]";
let p = parse_find_string(s).unwrap();
assert_eq!(p.find_spec,
FindSpec::FindScalar(Element::Variable(Variable(PlainSymbol::new("?x")))));
assert_eq!(p.where_clauses,
vec![
WhereClause::OrJoin(OrJoin {
unify_vars: UnifyVars::Explicit(vec![Variable(PlainSymbol::new("?x"))]),
clauses: vec![
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(10),
tx: PatternNonValuePlace::Placeholder,
})),
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(15),
tx: PatternNonValuePlace::Placeholder,
})),
],
}),
]);
}
#[test]
fn can_parse_simple_or_and_join() {
let s = "[:find ?x . :where (or [?x _ 10] (and (or [?x :foo/bar ?y] [?x :foo/baz ?y]) [(< ?y 1)]))]";
let p = parse_find_string(s).unwrap();
assert_eq!(p.find_spec,
FindSpec::FindScalar(Element::Variable(Variable(PlainSymbol::new("?x")))));
assert_eq!(p.where_clauses,
vec![
WhereClause::OrJoin(OrJoin {
unify_vars: UnifyVars::Implicit,
clauses: vec![
OrWhereClause::Clause(
WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Placeholder,
value: PatternValuePlace::EntidOrInteger(10),
tx: PatternNonValuePlace::Placeholder,
})),
OrWhereClause::And(
vec![
WhereClause::OrJoin(OrJoin {
unify_vars: UnifyVars::Implicit,
clauses: vec![
OrWhereClause::Clause(WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Ident(NamespacedKeyword::new("foo", "bar")),
value: PatternValuePlace::Variable(Variable(PlainSymbol::new("?y"))),
tx: PatternNonValuePlace::Placeholder,
})),
OrWhereClause::Clause(WhereClause::Pattern(Pattern {
source: None,
entity: PatternNonValuePlace::Variable(Variable(PlainSymbol::new("?x"))),
attribute: PatternNonValuePlace::Ident(NamespacedKeyword::new("foo", "baz")),
value: PatternValuePlace::Variable(Variable(PlainSymbol::new("?y"))),
tx: PatternNonValuePlace::Placeholder,
})),
],
}),
WhereClause::Pred(Predicate { operator: PlainSymbol::new("<"), args: vec![
FnArg::Variable(Variable(PlainSymbol::new("?y"))), FnArg::EntidOrInteger(1),
]}),
],
)
],
}),
]);
}