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mentat/query-algebrizer/tests/ground.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;
pub mod utils;
use std::collections::BTreeMap;
use mentat_core::{
Attribute,
Schema,
ValueType,
TypedValue,
};
use mentat_query::{
NamespacedKeyword,
PlainSymbol,
Variable,
};
use mentat_query_algebrizer::{
BindingError,
ComputedTable,
Error,
ErrorKind,
QueryInputs,
};
use utils::{
add_attribute,
alg,
associate_ident,
bails,
bails_with_inputs,
};
fn prepopulated_schema() -> Schema {
let mut schema = Schema::default();
associate_ident(&mut schema, NamespacedKeyword::new("foo", "name"), 65);
associate_ident(&mut schema, NamespacedKeyword::new("foo", "knows"), 66);
associate_ident(&mut schema, NamespacedKeyword::new("foo", "parent"), 67);
associate_ident(&mut schema, NamespacedKeyword::new("foo", "age"), 68);
associate_ident(&mut schema, NamespacedKeyword::new("foo", "height"), 69);
add_attribute(&mut schema, 65, Attribute {
value_type: ValueType::String,
multival: false,
..Default::default()
});
add_attribute(&mut schema, 66, Attribute {
value_type: ValueType::Ref,
multival: true,
..Default::default()
});
add_attribute(&mut schema, 67, Attribute {
value_type: ValueType::String,
multival: true,
..Default::default()
});
add_attribute(&mut schema, 68, Attribute {
value_type: ValueType::Long,
multival: false,
..Default::default()
});
add_attribute(&mut schema, 69, Attribute {
value_type: ValueType::Long,
multival: false,
..Default::default()
});
schema
}
#[test]
fn test_ground_doesnt_bail_for_type_conflicts() {
// We know `?x` to be a ref, but we're attempting to ground it to a Double.
// The query can return no results.
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground 9.95) ?x]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_tuple_fails_impossible() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5 9.95]) [?x ?p]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_scalar_fails_impossible() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground true) ?p]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_coll_skips_impossible() {
// We know `?x` to be a ref, but we're attempting to ground it to a Double.
// The query can return no results.
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5 9.95 11]) [?x ...]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
names: vec![Variable::from_valid_name("?x")],
values: vec![TypedValue::Ref(5), TypedValue::Ref(11)],
});
}
#[test]
fn test_ground_coll_fails_if_all_impossible() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5.1 5.2]) [?p ...]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_rel_skips_impossible() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo"] [5 7] [9.95 9] [11 12]]) [[?x ?p]]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?p")],
values: vec![TypedValue::Ref(5), TypedValue::Ref(7), TypedValue::Ref(11), TypedValue::Ref(12)],
});
}
#[test]
fn test_ground_rel_fails_if_all_impossible() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[11 5.1] [12 5.2]]) [[?x ?p]]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_tuple_rejects_all_placeholders() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [8 "foo" 3]) [_ _ _]]]"#;
let schema = prepopulated_schema();
bails(&schema, &q);
}
#[test]
fn test_ground_rel_rejects_all_placeholders() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo"]]) [[_ _]]]]"#;
let schema = prepopulated_schema();
bails(&schema, &q);
}
#[test]
fn test_ground_tuple_placeholders() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [8 "foo" 3]) [?x _ ?p]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.bound_value(&Variable::from_valid_name("?x")), Some(TypedValue::Ref(8)));
assert_eq!(cc.bound_value(&Variable::from_valid_name("?p")), Some(TypedValue::Ref(3)));
}
#[test]
fn test_ground_rel_placeholders() {
let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo" 3] [5 false 7] [5 9.95 9]]) [[?x _ ?p]]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?p")],
values: vec![
TypedValue::Ref(8),
TypedValue::Ref(3),
TypedValue::Ref(5),
TypedValue::Ref(7),
TypedValue::Ref(5),
TypedValue::Ref(9),
],
});
}
// Nothing to do with ground, but while we're here…
#[test]
fn test_multiple_reference_type_failure() {
let q = r#"[:find ?x :where [?x :foo/age ?y] [?x :foo/knows ?y]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_some());
}
#[test]
fn test_ground_tuple_infers_types() {
let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [8 10]) [?x ?v]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.bound_value(&Variable::from_valid_name("?x")), Some(TypedValue::Ref(8)));
assert_eq!(cc.bound_value(&Variable::from_valid_name("?v")), Some(TypedValue::Long(10)));
}
#[test]
fn test_ground_rel_infers_types() {
let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [[8 10]]) [[?x ?v]]]]"#;
let schema = prepopulated_schema();
let cc = alg(&schema, &q);
assert!(cc.empty_because.is_none());
assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?v")],
values: vec![TypedValue::Ref(8), TypedValue::Long(10)],
});
}
#[test]
fn test_ground_coll_heterogeneous_types() {
let q = r#"[:find ?x :where [?x _ ?v] [(ground [false 8.5]) [?v ...]]]"#;
let schema = prepopulated_schema();
let e = bails(&schema, &q);
match e {
Error(ErrorKind::InvalidGroundConstant, _) => {
},
_ => {
panic!();
},
}
}
#[test]
fn test_ground_rel_heterogeneous_types() {
let q = r#"[:find ?x :where [?x _ ?v] [(ground [[false] [5]]) [[?v]]]]"#;
let schema = prepopulated_schema();
let e = bails(&schema, &q);
match e {
Error(ErrorKind::InvalidGroundConstant, _) => {
},
_ => {
panic!();
},
}
}
#[test]
fn test_ground_tuple_duplicate_vars() {
let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [8 10]) [?x ?x]]]"#;
let schema = prepopulated_schema();
let e = bails(&schema, &q);
match e {
Error(ErrorKind::InvalidBinding(v, e), _) => {
assert_eq!(v, PlainSymbol::new("ground"));
assert_eq!(e, BindingError::RepeatedBoundVariable);
},
_ => {
panic!();
},
}
}
#[test]
fn test_ground_rel_duplicate_vars() {
let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [[8 10]]) [[?x ?x]]]]"#;
let schema = prepopulated_schema();
let e = bails(&schema, &q);
match e {
Error(ErrorKind::InvalidBinding(v, e), _) => {
assert_eq!(v, PlainSymbol::new("ground"));
assert_eq!(e, BindingError::RepeatedBoundVariable);
},
_ => {
panic!();
},
}
}
#[test]
fn test_ground_nonexistent_variable_invalid() {
let q = r#"[:find ?x ?e :where [?e _ ?x] (not [(ground 17) ?v])]"#;
let schema = prepopulated_schema();
let e = bails(&schema, &q);
match e {
Error(ErrorKind::UnboundVariable(PlainSymbol(v)), _) => {
assert_eq!(v, "?v".to_string());
},
_ => {
panic!();
},
}
}
#[test]
fn test_unbound_input_variable_invalid() {
let schema = prepopulated_schema();
let q = r#"[:find ?y ?age :in ?x :where [(ground [?x]) [?y ...]] [?y :foo/age ?age]]"#;
// This fails even if we know the type: we don't support grounding bindings
// that aren't known at algebrizing time.
let mut types = BTreeMap::default();
types.insert(Variable::from_valid_name("?x"), ValueType::Ref);
let i = QueryInputs::new(types, BTreeMap::default()).expect("valid QueryInputs");
let e = bails_with_inputs(&schema, &q, i);
match e {
Error(ErrorKind::UnboundVariable(v), _) => {
assert_eq!(v.0, "?x");
},
_ => {
panic!();
},
}
}
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