356 lines
11 KiB
Rust
356 lines
11 KiB
Rust
// Copyright 2016 Mozilla
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
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// this file except in compliance with the License. You may obtain a copy of the
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// License at http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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extern crate mentat_core;
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extern crate mentat_query;
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extern crate mentat_query_algebrizer;
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mod utils;
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use std::collections::BTreeMap;
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use mentat_core::{
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Attribute,
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Schema,
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ValueType,
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TypedValue,
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};
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use mentat_query::{
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Keyword,
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PlainSymbol,
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Variable,
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};
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use mentat_query_algebrizer::{
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BindingError,
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ComputedTable,
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Error,
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ErrorKind,
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Known,
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QueryInputs,
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};
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use utils::{
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add_attribute,
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alg,
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associate_ident,
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bails,
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bails_with_inputs,
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};
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fn prepopulated_schema() -> Schema {
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let mut schema = Schema::default();
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associate_ident(&mut schema, Keyword::namespaced("foo", "name"), 65);
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associate_ident(&mut schema, Keyword::namespaced("foo", "knows"), 66);
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associate_ident(&mut schema, Keyword::namespaced("foo", "parent"), 67);
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associate_ident(&mut schema, Keyword::namespaced("foo", "age"), 68);
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associate_ident(&mut schema, Keyword::namespaced("foo", "height"), 69);
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add_attribute(&mut schema, 65, Attribute {
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value_type: ValueType::String,
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multival: false,
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..Default::default()
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});
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add_attribute(&mut schema, 66, Attribute {
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value_type: ValueType::Ref,
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multival: true,
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..Default::default()
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});
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add_attribute(&mut schema, 67, Attribute {
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value_type: ValueType::String,
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multival: true,
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..Default::default()
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});
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add_attribute(&mut schema, 68, Attribute {
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value_type: ValueType::Long,
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multival: false,
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..Default::default()
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});
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add_attribute(&mut schema, 69, Attribute {
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value_type: ValueType::Long,
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multival: false,
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..Default::default()
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});
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schema
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}
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#[test]
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fn test_ground_doesnt_bail_for_type_conflicts() {
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// We know `?x` to be a ref, but we're attempting to ground it to a Double.
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// The query can return no results.
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground 9.95) ?x]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_tuple_fails_impossible() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5 9.95]) [?x ?p]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_scalar_fails_impossible() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground true) ?p]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_coll_skips_impossible() {
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// We know `?x` to be a ref, but we're attempting to ground it to a Double.
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// The query can return no results.
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5 9.95 11]) [?x ...]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
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names: vec![Variable::from_valid_name("?x")],
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values: vec![TypedValue::Ref(5), TypedValue::Ref(11)],
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});
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}
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#[test]
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fn test_ground_coll_fails_if_all_impossible() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [5.1 5.2]) [?p ...]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_rel_skips_impossible() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo"] [5 7] [9.95 9] [11 12]]) [[?x ?p]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
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names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?p")],
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values: vec![TypedValue::Ref(5), TypedValue::Ref(7), TypedValue::Ref(11), TypedValue::Ref(12)],
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});
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}
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#[test]
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fn test_ground_rel_fails_if_all_impossible() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[11 5.1] [12 5.2]]) [[?x ?p]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_tuple_rejects_all_placeholders() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [8 "foo" 3]) [_ _ _]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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bails(known, &q);
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}
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#[test]
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fn test_ground_rel_rejects_all_placeholders() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo"]]) [[_ _]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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bails(known, &q);
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}
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#[test]
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fn test_ground_tuple_placeholders() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [8 "foo" 3]) [?x _ ?p]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.bound_value(&Variable::from_valid_name("?x")), Some(TypedValue::Ref(8)));
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assert_eq!(cc.bound_value(&Variable::from_valid_name("?p")), Some(TypedValue::Ref(3)));
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}
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#[test]
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fn test_ground_rel_placeholders() {
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let q = r#"[:find ?x :where [?x :foo/knows ?p] [(ground [[8 "foo" 3] [5 false 7] [5 9.95 9]]) [[?x _ ?p]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
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names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?p")],
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values: vec![
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TypedValue::Ref(8),
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TypedValue::Ref(3),
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TypedValue::Ref(5),
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TypedValue::Ref(7),
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TypedValue::Ref(5),
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TypedValue::Ref(9),
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],
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});
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}
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// Nothing to do with ground, but while we're here…
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#[test]
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fn test_multiple_reference_type_failure() {
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let q = r#"[:find ?x :where [?x :foo/age ?y] [?x :foo/knows ?y]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_some());
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}
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#[test]
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fn test_ground_tuple_infers_types() {
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let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [8 10]) [?x ?v]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.bound_value(&Variable::from_valid_name("?x")), Some(TypedValue::Ref(8)));
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assert_eq!(cc.bound_value(&Variable::from_valid_name("?v")), Some(TypedValue::Long(10)));
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}
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// We determine the types of variables in the query in an early first pass, and thus we can
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// safely use idents to name entities, including attributes.
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#[test]
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fn test_ground_coll_infers_attribute_types() {
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let q = r#"[:find ?x
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:where [(ground [:foo/age :foo/height]) [?a ...]]
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[?x ?a ?v]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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}
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#[test]
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fn test_ground_rel_infers_types() {
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let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [[8 10]]) [[?x ?v]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let cc = alg(known, &q);
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assert!(cc.empty_because.is_none());
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assert_eq!(cc.computed_tables[0], ComputedTable::NamedValues {
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names: vec![Variable::from_valid_name("?x"), Variable::from_valid_name("?v")],
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values: vec![TypedValue::Ref(8), TypedValue::Long(10)],
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});
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}
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#[test]
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fn test_ground_coll_heterogeneous_types() {
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let q = r#"[:find ?x :where [?x _ ?v] [(ground [false 8.5]) [?v ...]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let e = bails(known, &q);
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match e {
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Error(ErrorKind::InvalidGroundConstant, _) => {
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},
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_ => {
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panic!();
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},
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}
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}
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#[test]
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fn test_ground_rel_heterogeneous_types() {
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let q = r#"[:find ?x :where [?x _ ?v] [(ground [[false] [5]]) [[?v]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let e = bails(known, &q);
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match e {
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Error(ErrorKind::InvalidGroundConstant, _) => {
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},
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_ => {
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panic!();
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},
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}
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}
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#[test]
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fn test_ground_tuple_duplicate_vars() {
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let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [8 10]) [?x ?x]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let e = bails(known, &q);
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match e {
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Error(ErrorKind::InvalidBinding(v, e), _) => {
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assert_eq!(v, PlainSymbol::plain("ground"));
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assert_eq!(e, BindingError::RepeatedBoundVariable);
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},
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_ => {
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panic!();
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},
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}
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}
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#[test]
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fn test_ground_rel_duplicate_vars() {
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let q = r#"[:find ?x :where [?x :foo/age ?v] [(ground [[8 10]]) [[?x ?x]]]]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let e = bails(known, &q);
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match e {
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Error(ErrorKind::InvalidBinding(v, e), _) => {
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assert_eq!(v, PlainSymbol::plain("ground"));
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assert_eq!(e, BindingError::RepeatedBoundVariable);
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},
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_ => {
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panic!();
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},
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}
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}
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#[test]
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fn test_ground_nonexistent_variable_invalid() {
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let q = r#"[:find ?x ?e :where [?e _ ?x] (not [(ground 17) ?v])]"#;
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let e = bails(known, &q);
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match e {
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Error(ErrorKind::UnboundVariable(PlainSymbol(v)), _) => {
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assert_eq!(v, "?v".to_string());
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},
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_ => {
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panic!();
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},
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}
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}
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#[test]
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fn test_unbound_input_variable_invalid() {
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let schema = prepopulated_schema();
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let known = Known::for_schema(&schema);
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let q = r#"[:find ?y ?age :in ?x :where [(ground [?x]) [?y ...]] [?y :foo/age ?age]]"#;
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// This fails even if we know the type: we don't support grounding bindings
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// that aren't known at algebrizing time.
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let mut types = BTreeMap::default();
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types.insert(Variable::from_valid_name("?x"), ValueType::Ref);
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let i = QueryInputs::new(types, BTreeMap::default()).expect("valid QueryInputs");
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let e = bails_with_inputs(known, &q, i);
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match e {
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Error(ErrorKind::UnboundVariable(v), _) => {
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assert_eq!(v.0, "?x");
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},
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_ => {
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panic!();
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},
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}
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}
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