mentat/query-projector/tests/aggregates.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_projector;
use mentat_core::{
Attribute,
Entid,
Schema,
ValueType,
};
use mentat_query::{
Keyword,
};
use mentat_query_algebrizer::{
Known,
algebrize,
parse_find_string,
};
use mentat_query_projector::{
query_projection,
};
// These are helpers that tests use to build Schema instances.
fn associate_ident(schema: &mut Schema, i: Keyword, e: Entid) {
schema.entid_map.insert(e, i.clone());
schema.ident_map.insert(i.clone(), e);
}
fn add_attribute(schema: &mut Schema, e: Entid, a: Attribute) {
schema.attribute_map.insert(e, a);
}
fn prepopulated_schema() -> Schema {
let mut schema = Schema::default();
associate_ident(&mut schema, Keyword::namespaced("foo", "name"), 65);
associate_ident(&mut schema, Keyword::namespaced("foo", "age"), 68);
associate_ident(&mut schema, Keyword::namespaced("foo", "height"), 69);
add_attribute(&mut schema, 65, Attribute {
value_type: ValueType::String,
multival: false,
..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_aggregate_unsuitable_type() {
let schema = prepopulated_schema();
let query = r#"[:find (avg ?e)
:where
[?e :foo/age ?a]]"#;
// While the query itself algebrizes and parses…
let parsed = parse_find_string(query).expect("query input to have parsed");
let algebrized = algebrize(Known::for_schema(&schema), parsed).expect("query algebrizes");
// … when we look at the projection list, we cannot reconcile the types.
assert!(query_projection(&schema, &algebrized).is_err());
}
#[test]
fn test_the_without_max_or_min() {
let schema = prepopulated_schema();
let query = r#"[:find (the ?e) ?a
:where
[?e :foo/age ?a]]"#;
// While the query itself algebrizes and parses…
let parsed = parse_find_string(query).expect("query input to have parsed");
let algebrized = algebrize(Known::for_schema(&schema), parsed).expect("query algebrizes");
// … when we look at the projection list, we cannot reconcile the types.
let projection = query_projection(&schema, &algebrized);
assert!(projection.is_err());
use ::mentat_query_projector::errors::{
ErrorKind,
Error,
};
match projection {
Result::Err(Error(ErrorKind::InvalidProjection(s) , _)) => {
assert_eq!(s.as_str(), "Warning: used `the` without `min` or `max`.");
},
_ => panic!(),
}
}