ui/src/common/event_set_unittest.ts - third_party/perfetto - Git at Google

 // Copyright (C) 2023 The Android Open Source Project
 //
 // 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.

 import {
   c,
   cmpFromExpr,
   cmpFromSort,
   ConcreteEventSet,
   Direction,
   EmptyEventSet,
   EmptyKeySet,
   eq,
   Event,
   EventSet,
   isConcreteEventSet,
   isEmptyEventSet,
   KeySet,
   Num,
   Str,
   UntypedEvent,
   v,
 } from './event_set';

 describe('EventSet', () => {
   test('Event', () => {
     {
       const keyset: EmptyKeySet = {};
       const event: Event<typeof keyset> = {
         id: 'foo',
       };
       void event;
     } {
       const keyset = {
         'bar': Num,
       };
       const event: Event<typeof keyset> = {
         id: 'foo',
         bar: 42,
       };
       void event;
     }
   });

   describe('EmptyEventSet', () => {
     test('isEmpty', async () => {
       const events = EmptyEventSet.get();
       expect(await events.isEmpty()).toEqual(true);
       expect(await events.count()).toEqual(0);
     });

     test('isEmptyEventSet', () => {
       const events: EventSet<KeySet> = EmptyEventSet.get();
       expect(isEmptyEventSet(events)).toEqual(true);
     });

     test('materialise', async () => {
       const events: EventSet<KeySet> = EmptyEventSet.get();
       const materialised = await events.materialise({});

       expect(await materialised.isEmpty()).toEqual(true);
       expect(await materialised.count()).toEqual(0);
       expect(materialised.events).toEqual([]);
       expect(isConcreteEventSet(materialised)).toEqual(true);
     });

     test('union', async () => {
       const a: EventSet<KeySet> = EmptyEventSet.get();
       const b: EventSet<KeySet> = EmptyEventSet.get();

       const aUnionB = a.union(b);

       expect(await aUnionB.isEmpty()).toEqual(true);
       expect(await aUnionB.count()).toEqual(0);
     });

     test('intersect', async () => {
       const a: EventSet<KeySet> = EmptyEventSet.get();
       const b: EventSet<KeySet> = EmptyEventSet.get();

       const aIntersectB = a.intersect(b);

       expect(await aIntersectB.isEmpty()).toEqual(true);
       expect(await aIntersectB.count()).toEqual(0);
     });

     test('filter', async () => {
       const events: EventSet<KeySet> = EmptyEventSet.get();
       const filtered = await events.filter(c(true));

       expect(filtered).toBe(events);
       expect(await filtered.isEmpty()).toEqual(true);
       expect(await filtered.count()).toEqual(0);
     });

     test('sort', async () => {
       const events: EventSet<KeySet> = EmptyEventSet.get();
       const sorted = await events.sort({
         direction: Direction.ASC,
         expression: c(0),
       });

       expect(sorted).toBe(events);
       expect(await sorted.isEmpty()).toEqual(true);
       expect(await sorted.count()).toEqual(0);
     });
   });

   describe('ConcreteEventSet', () => {
     test('isEmpty', async () => {
       const event: Event<EmptyKeySet> = {
         id: 'foo',
       };
       const empty = new ConcreteEventSet<EmptyKeySet>({}, []);
       const events = new ConcreteEventSet<EmptyKeySet>({}, [event]);
       expect(await empty.isEmpty()).toEqual(true);
       expect(await empty.count()).toEqual(0);
       expect(await events.isEmpty()).toEqual(false);
       expect(await events.count()).toEqual(1);
     });

     test('isConcreteEventSet', () => {
       expect(isConcreteEventSet(new ConcreteEventSet<EmptyKeySet>({}, [])))
           .toEqual(true);
       expect(isConcreteEventSet(EmptyEventSet.get())).toEqual(false);
     });

     test('materialise', async () => {
       const keys = {
         num: Num,
         char: Str,
       };

       const a: Event<typeof keys> = {
         id: 'a',
         num: 97,
         char: 'a',
       };
       const b: Event<typeof keys> = {
         id: 'b',
         num: 98,
         char: 'b',
       };
       const d: Event<typeof keys> = {
         id: 'd',
         num: 100,
         char: 'd',
       };

       const events = new ConcreteEventSet(keys, [a, b, d]);

       expect((await events.materialise(keys)).events).toEqual([a, b, d]);
       expect((await events.materialise(keys, 1)).events).toEqual([b, d]);
       expect((await events.materialise(keys, 1, 1)).events).toEqual([b]);
       expect((await events.materialise(keys, 99)).events).toEqual([]);
       expect((await events.materialise(keys, 99, 0)).events).toEqual([]);
       expect((await events.materialise({num: Num})).events).toEqual([
         {id: 'a', num: 97},
         {id: 'b', num: 98},
         {id: 'd', num: 100},
       ]);
       expect((await events.materialise({char: Str}, 1, 1)).events).toEqual([
         {id: 'b', char: 'b'},
       ]);
     });

     test('union', async () => {
       const a: Event<EmptyKeySet> = {
         id: 'a',
       };
       const b: Event<EmptyKeySet> = {
         id: 'b',
       };
       const d: Event<EmptyKeySet> = {
         id: 'd',
       };

       const empty = EmptyEventSet.get();
       const justA = new ConcreteEventSet({}, [a]);
       const justB = new ConcreteEventSet({}, [b]);
       const justD = new ConcreteEventSet({}, [d]);

       const aAndB = justA.union(justB);
       const aAndA = justA.union(justA);
       const aAndD = justA.union(justD);
       const aAndBAndEmpty = aAndB.union(empty);
       const aAndDAndAAndB = aAndD.union(aAndB);

       expect((await aAndB.materialise({})).events).toEqual([a, b]);
       expect((await aAndA.materialise({})).events).toEqual([a]);
       expect((await aAndD.materialise({})).events).toEqual([a, d]);
       expect((await aAndBAndEmpty.materialise({})).events).toEqual([a, b]);
       expect((await aAndDAndAAndB.materialise({})).events).toEqual([a, d, b]);

       expect(await aAndB.isEmpty()).toEqual(false);
       expect(await aAndA.isEmpty()).toEqual(false);
       expect(await aAndD.isEmpty()).toEqual(false);
       expect(await aAndBAndEmpty.isEmpty()).toEqual(false);
       expect(await aAndDAndAAndB.isEmpty()).toEqual(false);

       expect(await aAndB.count()).toEqual(2);
       expect(await aAndA.count()).toEqual(1);
       expect(await aAndD.count()).toEqual(2);
       expect(await aAndBAndEmpty.count()).toEqual(2);
       expect(await aAndDAndAAndB.count()).toEqual(3);
     });

     test('intersection', async () => {
       const a: Event<EmptyKeySet> = {
         id: 'a',
       };
       const b: Event<EmptyKeySet> = {
         id: 'b',
       };
       const d: Event<EmptyKeySet> = {
         id: 'd',
       };

       const empty = EmptyEventSet.get();
       const justA = new ConcreteEventSet({}, [a]);
       const justB = new ConcreteEventSet({}, [b]);
       const justD = new ConcreteEventSet({}, [d]);

       const aAndB = justA.intersect(justB);
       const aAndA = justA.intersect(justA);
       const aAndD = justA.intersect(justD);
       const aBAndEmpty = justA.union(justB).intersect(empty);
       const aDAndAB = justA.union(justB).intersect(justA.union(justD));

       expect((await aAndB.materialise({})).events).toEqual([]);
       expect((await aAndA.materialise({})).events).toEqual([a]);
       expect((await aAndD.materialise({})).events).toEqual([]);
       expect((await aBAndEmpty.materialise({})).events).toEqual([]);
       expect((await aDAndAB.materialise({})).events).toEqual([a]);

       expect(await aAndB.isEmpty()).toEqual(true);
       expect(await aAndA.isEmpty()).toEqual(false);
       expect(await aAndD.isEmpty()).toEqual(true);
       expect(await aBAndEmpty.isEmpty()).toEqual(true);
       expect(await aDAndAB.isEmpty()).toEqual(false);

       expect(await aAndB.count()).toEqual(0);
       expect(await aAndA.count()).toEqual(1);
       expect(await aAndD.count()).toEqual(0);
       expect(await aBAndEmpty.count()).toEqual(0);
       expect(await aDAndAB.count()).toEqual(1);
     });

     test('filter', async () => {
       const keys = {
         num: Num,
         char: Str,
       };

       const a: Event<typeof keys> = {
         id: 'a',
         num: 97,
         char: 'a',
       };
       const b: Event<typeof keys> = {
         id: 'b',
         num: 98,
         char: 'b',
       };
       const d: Event<typeof keys> = {
         id: 'd',
         num: 100,
         char: 'd',
       };

       const events = new ConcreteEventSet(keys, [a, b, d]);


       const justA = events.filter(eq(v('id'), c('a')));
       const justD = events.filter(eq(v('num'), c(100)));

       expect((await justA.materialise(keys)).events).toEqual([a]);
       expect((await justD.materialise(keys)).events).toEqual([d]);
     });

     test('sort', async () => {
       const keys = {
         num: Num,
         char: Str,
       };

       const a: Event<typeof keys> = {
         id: 'a',
         num: 97,
         char: 'a',
       };
       const b: Event<typeof keys> = {
         id: 'b',
         num: 98,
         char: 'b',
       };
       const d: Event<typeof keys> = {
         id: 'd',
         num: 100,
         char: 'd',
       };

       const events = new ConcreteEventSet(keys, [a, b, d]);


       const byNum = events.sort({
         expression: v('num'),
         direction: Direction.ASC,
       });
       const byStr = events.sort({
         expression: v('char'),
         direction: Direction.ASC,
       });

       expect((await byNum.materialise(keys)).events).toEqual([a, b, d]);
       expect((await byStr.materialise(keys)).events).toEqual([a, b, d]);
     });

     test('sort desc', async () => {
       const keys = {
         num: Num,
         char: Str,
       };

       const a: Event<typeof keys> = {
         id: 'a',
         num: 97,
         char: 'a',
       };
       const b: Event<typeof keys> = {
         id: 'b',
         num: 98,
         char: 'b',
       };
       const d: Event<typeof keys> = {
         id: 'd',
         num: 100,
         char: 'd',
       };

       const events = new ConcreteEventSet(keys, [a, b, d]);


       const byNum = events.sort({
         expression: v('num'),
         direction: Direction.DESC,
       });
       const byStr = events.sort({
         expression: v('char'),
         direction: Direction.DESC,
       });

       expect((await byNum.materialise(keys)).events).toEqual([d, b, a]);
       expect((await byStr.materialise(keys)).events).toEqual([d, b, a]);
     });
   });
 });

 describe('cmpFromExpr', () => {
   test('simple', () => {
     const a: UntypedEvent = {
       id: 'a',
       x: 0,
     };
     const b: UntypedEvent = {
       id: 'b',
       x: 42,
     };
     const c: UntypedEvent = {
       id: 'c',
       x: 0,
     };

     const cmp = cmpFromExpr(v('x'));
     expect(cmp(a, b)).toEqual(-1);
     expect(cmp(a, a)).toEqual(0);
     expect(cmp(b, a)).toEqual(1);
     expect(cmp(a, c)).toEqual(0);
   });

   test('kinds', () => {
     const nullEvent: UntypedEvent = {
       id: 'nullEvent',
       x: null,
     };
     const sevenEvent: UntypedEvent = {
       id: 'sevenEvent',
       x: 7,
     };
     const oneEvent: UntypedEvent = {
       id: 'oneEvent',
       x: 1,
     };
     const zeroEvent: UntypedEvent = {
       id: 'zeroEvent',
       x: 0,
     };
     const trueEvent: UntypedEvent = {
       id: 'trueEvent',
       x: true,
     };
     const falseEvent: UntypedEvent = {
       id: 'falseEvent',
       x: false,
     };
     const aardvarkEvent: UntypedEvent = {
       id: 'aardvarkEvent',
       x: 'aardvark',
     };
     const zigguratEvent: UntypedEvent = {
       id: 'zigguratEvent',
       x: 'ziggurat',
     };
     const bigZeroEvent: UntypedEvent = {
       id: 'bigZeroEvent',
       x: 0n,
     };
     const bigOneEvent: UntypedEvent = {
       id: 'bigOneEvent',
       x: 1n,
     };
     const bigTwoEvent: UntypedEvent = {
       id: 'bigTwoEvent',
       x: 2n,
     };

     const cmp = cmpFromExpr(v('x'));

     // Everything is equal to itself:
     expect(cmp(nullEvent, nullEvent)).toEqual(0);
     expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
     expect(cmp(oneEvent, oneEvent)).toEqual(0);
     expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(falseEvent, falseEvent)).toEqual(0);
     expect(cmp(trueEvent, trueEvent)).toEqual(0);
     expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
     expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
     expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

     // BigInt(x) == x
     expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

     // one = true, zero = false:
     expect(cmp(oneEvent, trueEvent)).toEqual(0);
     expect(cmp(zeroEvent, falseEvent)).toEqual(0);
     expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

     // 0 < 1 < 7
     expect(cmp(zeroEvent, oneEvent)).toEqual(-1);
     expect(cmp(sevenEvent, oneEvent)).toEqual(1);

     // 0n < 1n < 2n
     expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(-1);
     expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(1);

     // 0 < 1n < 7
     expect(cmp(zeroEvent, bigOneEvent)).toEqual(-1);
     expect(cmp(sevenEvent, bigOneEvent)).toEqual(1);

     // aardvark < ziggurat
     expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(-1);

     // null < {bools, numbers, BigInt} < strings
     expect(cmp(nullEvent, falseEvent)).toEqual(-1);
     expect(cmp(aardvarkEvent, sevenEvent)).toEqual(1);
     expect(cmp(nullEvent, bigZeroEvent)).toEqual(-1);
     expect(cmp(bigZeroEvent, sevenEvent)).toEqual(-1);
     expect(cmp(nullEvent, falseEvent)).toEqual(-1);
     expect(cmp(falseEvent, sevenEvent)).toEqual(-1);
   });
 });

 describe('cmpFromSort', () => {
   test('simple asc', () => {
     const a: UntypedEvent = {
       id: 'a',
       x: 0,
     };
     const b: UntypedEvent = {
       id: 'b',
       x: 42,
     };
     const c: UntypedEvent = {
       id: 'c',
       x: 0,
     };

     const cmp = cmpFromSort({
       expression: v('x'),
       direction: Direction.ASC,
     });
     expect(cmp(a, b)).toEqual(-1);
     expect(cmp(a, a)).toEqual(0);
     expect(cmp(b, a)).toEqual(1);
     expect(cmp(a, c)).toEqual(0);
   });

   test('kinds asc', () => {
     const nullEvent: UntypedEvent = {
       id: 'nullEvent',
       x: null,
     };
     const sevenEvent: UntypedEvent = {
       id: 'sevenEvent',
       x: 7,
     };
     const oneEvent: UntypedEvent = {
       id: 'oneEvent',
       x: 1,
     };
     const zeroEvent: UntypedEvent = {
       id: 'zeroEvent',
       x: 0,
     };
     const trueEvent: UntypedEvent = {
       id: 'trueEvent',
       x: true,
     };
     const falseEvent: UntypedEvent = {
       id: 'falseEvent',
       x: false,
     };
     const aardvarkEvent: UntypedEvent = {
       id: 'aardvarkEvent',
       x: 'aardvark',
     };
     const zigguratEvent: UntypedEvent = {
       id: 'zigguratEvent',
       x: 'ziggurat',
     };
     const bigZeroEvent: UntypedEvent = {
       id: 'bigZeroEvent',
       x: 0n,
     };
     const bigOneEvent: UntypedEvent = {
       id: 'bigOneEvent',
       x: 1n,
     };
     const bigTwoEvent: UntypedEvent = {
       id: 'bigTwoEvent',
       x: 2n,
     };

     const cmp = cmpFromSort({
       expression: v('x'),
       direction: Direction.ASC,
     });

     // Everything is equal to itself:
     expect(cmp(nullEvent, nullEvent)).toEqual(0);
     expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
     expect(cmp(oneEvent, oneEvent)).toEqual(0);
     expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(falseEvent, falseEvent)).toEqual(0);
     expect(cmp(trueEvent, trueEvent)).toEqual(0);
     expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
     expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
     expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

     // BigInt(x) == x
     expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

     // one = true, zero = false:
     expect(cmp(oneEvent, trueEvent)).toEqual(0);
     expect(cmp(zeroEvent, falseEvent)).toEqual(0);
     expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

     // 0 < 1 < 7
     expect(cmp(zeroEvent, oneEvent)).toEqual(-1);
     expect(cmp(sevenEvent, oneEvent)).toEqual(1);

     // 0n < 1n < 2n
     expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(-1);
     expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(1);

     // 0 < 1n < 7
     expect(cmp(zeroEvent, bigOneEvent)).toEqual(-1);
     expect(cmp(sevenEvent, bigOneEvent)).toEqual(1);

     // aardvark < ziggurat
     expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(-1);

     // null < {bools, numbers, BigInt} < strings
     expect(cmp(nullEvent, falseEvent)).toEqual(-1);
     expect(cmp(aardvarkEvent, sevenEvent)).toEqual(1);
     expect(cmp(nullEvent, bigZeroEvent)).toEqual(-1);
     expect(cmp(bigZeroEvent, sevenEvent)).toEqual(-1);
     expect(cmp(nullEvent, falseEvent)).toEqual(-1);
     expect(cmp(falseEvent, sevenEvent)).toEqual(-1);
   });

   test('simple desc', () => {
     const a: UntypedEvent = {
       id: 'a',
       x: 0,
     };
     const b: UntypedEvent = {
       id: 'b',
       x: 42,
     };
     const c: UntypedEvent = {
       id: 'c',
       x: 0,
     };

     const cmp = cmpFromSort({
       expression: v('x'),
       direction: Direction.DESC,
     });
     expect(cmp(a, b)).toEqual(1);
     expect(cmp(a, a)).toEqual(0);
     expect(cmp(b, a)).toEqual(-1);
     expect(cmp(a, c)).toEqual(0);
   });

   test('kinds desc', () => {
     const nullEvent: UntypedEvent = {
       id: 'nullEvent',
       x: null,
     };
     const sevenEvent: UntypedEvent = {
       id: 'sevenEvent',
       x: 7,
     };
     const oneEvent: UntypedEvent = {
       id: 'oneEvent',
       x: 1,
     };
     const zeroEvent: UntypedEvent = {
       id: 'zeroEvent',
       x: 0,
     };
     const trueEvent: UntypedEvent = {
       id: 'trueEvent',
       x: true,
     };
     const falseEvent: UntypedEvent = {
       id: 'falseEvent',
       x: false,
     };
     const aardvarkEvent: UntypedEvent = {
       id: 'aardvarkEvent',
       x: 'aardvark',
     };
     const zigguratEvent: UntypedEvent = {
       id: 'zigguratEvent',
       x: 'ziggurat',
     };
     const bigZeroEvent: UntypedEvent = {
       id: 'bigZeroEvent',
       x: 0n,
     };
     const bigOneEvent: UntypedEvent = {
       id: 'bigOneEvent',
       x: 1n,
     };
     const bigTwoEvent: UntypedEvent = {
       id: 'bigTwoEvent',
       x: 2n,
     };

     const cmp = cmpFromSort({
       expression: v('x'),
       direction: Direction.DESC,
     });

     // Everything is equal to itself:
     expect(cmp(nullEvent, nullEvent)).toEqual(0);
     expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
     expect(cmp(oneEvent, oneEvent)).toEqual(0);
     expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(falseEvent, falseEvent)).toEqual(0);
     expect(cmp(trueEvent, trueEvent)).toEqual(0);
     expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
     expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
     expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

     // BigInt(x) == x
     expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
     expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

     // one = true, zero = false:
     expect(cmp(oneEvent, trueEvent)).toEqual(0);
     expect(cmp(zeroEvent, falseEvent)).toEqual(0);
     expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
     expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

     // 0 < 1 < 7
     expect(cmp(zeroEvent, oneEvent)).toEqual(1);
     expect(cmp(sevenEvent, oneEvent)).toEqual(-1);

     // 0n < 1n < 2n
     expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(1);
     expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(-1);

     // 0 < 1n < 7
     expect(cmp(zeroEvent, bigOneEvent)).toEqual(1);
     expect(cmp(sevenEvent, bigOneEvent)).toEqual(-1);

     // aardvark < ziggurat
     expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(1);

     // null < {bools, numbers, BigInt} < strings
     expect(cmp(nullEvent, falseEvent)).toEqual(1);
     expect(cmp(aardvarkEvent, sevenEvent)).toEqual(-1);
     expect(cmp(nullEvent, bigZeroEvent)).toEqual(1);
     expect(cmp(bigZeroEvent, sevenEvent)).toEqual(1);
     expect(cmp(nullEvent, falseEvent)).toEqual(1);
     expect(cmp(falseEvent, sevenEvent)).toEqual(1);
   });
 });
	// Copyright (C) 2023 The Android Open Source Project
	//
	// 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.

	import {
	c,
	cmpFromExpr,
	cmpFromSort,
	ConcreteEventSet,
	Direction,
	EmptyEventSet,
	EmptyKeySet,
	eq,
	Event,
	EventSet,
	isConcreteEventSet,
	isEmptyEventSet,
	KeySet,
	Num,
	Str,
	UntypedEvent,
	v,
	} from './event_set';

	describe('EventSet', () => {
	test('Event', () => {
	{
	const keyset: EmptyKeySet = {};
	const event: Event<typeof keyset> = {
	id: 'foo',
	};
	void event;
	} {
	const keyset = {
	'bar': Num,
	};
	const event: Event<typeof keyset> = {
	id: 'foo',
	bar: 42,
	};
	void event;
	}
	});

	describe('EmptyEventSet', () => {
	test('isEmpty', async () => {
	const events = EmptyEventSet.get();
	expect(await events.isEmpty()).toEqual(true);
	expect(await events.count()).toEqual(0);
	});

	test('isEmptyEventSet', () => {
	const events: EventSet<KeySet> = EmptyEventSet.get();
	expect(isEmptyEventSet(events)).toEqual(true);
	});

	test('materialise', async () => {
	const events: EventSet<KeySet> = EmptyEventSet.get();
	const materialised = await events.materialise({});

	expect(await materialised.isEmpty()).toEqual(true);
	expect(await materialised.count()).toEqual(0);
	expect(materialised.events).toEqual([]);
	expect(isConcreteEventSet(materialised)).toEqual(true);
	});

	test('union', async () => {
	const a: EventSet<KeySet> = EmptyEventSet.get();
	const b: EventSet<KeySet> = EmptyEventSet.get();

	const aUnionB = a.union(b);

	expect(await aUnionB.isEmpty()).toEqual(true);
	expect(await aUnionB.count()).toEqual(0);
	});

	test('intersect', async () => {
	const a: EventSet<KeySet> = EmptyEventSet.get();
	const b: EventSet<KeySet> = EmptyEventSet.get();

	const aIntersectB = a.intersect(b);

	expect(await aIntersectB.isEmpty()).toEqual(true);
	expect(await aIntersectB.count()).toEqual(0);
	});

	test('filter', async () => {
	const events: EventSet<KeySet> = EmptyEventSet.get();
	const filtered = await events.filter(c(true));

	expect(filtered).toBe(events);
	expect(await filtered.isEmpty()).toEqual(true);
	expect(await filtered.count()).toEqual(0);
	});

	test('sort', async () => {
	const events: EventSet<KeySet> = EmptyEventSet.get();
	const sorted = await events.sort({
	direction: Direction.ASC,
	expression: c(0),
	});

	expect(sorted).toBe(events);
	expect(await sorted.isEmpty()).toEqual(true);
	expect(await sorted.count()).toEqual(0);
	});
	});

	describe('ConcreteEventSet', () => {
	test('isEmpty', async () => {
	const event: Event<EmptyKeySet> = {
	id: 'foo',
	};
	const empty = new ConcreteEventSet<EmptyKeySet>({}, []);
	const events = new ConcreteEventSet<EmptyKeySet>({}, [event]);
	expect(await empty.isEmpty()).toEqual(true);
	expect(await empty.count()).toEqual(0);
	expect(await events.isEmpty()).toEqual(false);
	expect(await events.count()).toEqual(1);
	});

	test('isConcreteEventSet', () => {
	expect(isConcreteEventSet(new ConcreteEventSet<EmptyKeySet>({}, [])))
	.toEqual(true);
	expect(isConcreteEventSet(EmptyEventSet.get())).toEqual(false);
	});

	test('materialise', async () => {
	const keys = {
	num: Num,
	char: Str,
	};

	const a: Event<typeof keys> = {
	id: 'a',
	num: 97,
	char: 'a',
	};
	const b: Event<typeof keys> = {
	id: 'b',
	num: 98,
	char: 'b',
	};
	const d: Event<typeof keys> = {
	id: 'd',
	num: 100,
	char: 'd',
	};

	const events = new ConcreteEventSet(keys, [a, b, d]);

	expect((await events.materialise(keys)).events).toEqual([a, b, d]);
	expect((await events.materialise(keys, 1)).events).toEqual([b, d]);
	expect((await events.materialise(keys, 1, 1)).events).toEqual([b]);
	expect((await events.materialise(keys, 99)).events).toEqual([]);
	expect((await events.materialise(keys, 99, 0)).events).toEqual([]);
	expect((await events.materialise({num: Num})).events).toEqual([
	{id: 'a', num: 97},
	{id: 'b', num: 98},
	{id: 'd', num: 100},
	]);
	expect((await events.materialise({char: Str}, 1, 1)).events).toEqual([
	{id: 'b', char: 'b'},
	]);
	});

	test('union', async () => {
	const a: Event<EmptyKeySet> = {
	id: 'a',
	};
	const b: Event<EmptyKeySet> = {
	id: 'b',
	};
	const d: Event<EmptyKeySet> = {
	id: 'd',
	};

	const empty = EmptyEventSet.get();
	const justA = new ConcreteEventSet({}, [a]);
	const justB = new ConcreteEventSet({}, [b]);
	const justD = new ConcreteEventSet({}, [d]);

	const aAndB = justA.union(justB);
	const aAndA = justA.union(justA);
	const aAndD = justA.union(justD);
	const aAndBAndEmpty = aAndB.union(empty);
	const aAndDAndAAndB = aAndD.union(aAndB);

	expect((await aAndB.materialise({})).events).toEqual([a, b]);
	expect((await aAndA.materialise({})).events).toEqual([a]);
	expect((await aAndD.materialise({})).events).toEqual([a, d]);
	expect((await aAndBAndEmpty.materialise({})).events).toEqual([a, b]);
	expect((await aAndDAndAAndB.materialise({})).events).toEqual([a, d, b]);

	expect(await aAndB.isEmpty()).toEqual(false);
	expect(await aAndA.isEmpty()).toEqual(false);
	expect(await aAndD.isEmpty()).toEqual(false);
	expect(await aAndBAndEmpty.isEmpty()).toEqual(false);
	expect(await aAndDAndAAndB.isEmpty()).toEqual(false);

	expect(await aAndB.count()).toEqual(2);
	expect(await aAndA.count()).toEqual(1);
	expect(await aAndD.count()).toEqual(2);
	expect(await aAndBAndEmpty.count()).toEqual(2);
	expect(await aAndDAndAAndB.count()).toEqual(3);
	});

	test('intersection', async () => {
	const a: Event<EmptyKeySet> = {
	id: 'a',
	};
	const b: Event<EmptyKeySet> = {
	id: 'b',
	};
	const d: Event<EmptyKeySet> = {
	id: 'd',
	};

	const empty = EmptyEventSet.get();
	const justA = new ConcreteEventSet({}, [a]);
	const justB = new ConcreteEventSet({}, [b]);
	const justD = new ConcreteEventSet({}, [d]);

	const aAndB = justA.intersect(justB);
	const aAndA = justA.intersect(justA);
	const aAndD = justA.intersect(justD);
	const aBAndEmpty = justA.union(justB).intersect(empty);
	const aDAndAB = justA.union(justB).intersect(justA.union(justD));

	expect((await aAndB.materialise({})).events).toEqual([]);
	expect((await aAndA.materialise({})).events).toEqual([a]);
	expect((await aAndD.materialise({})).events).toEqual([]);
	expect((await aBAndEmpty.materialise({})).events).toEqual([]);
	expect((await aDAndAB.materialise({})).events).toEqual([a]);

	expect(await aAndB.isEmpty()).toEqual(true);
	expect(await aAndA.isEmpty()).toEqual(false);
	expect(await aAndD.isEmpty()).toEqual(true);
	expect(await aBAndEmpty.isEmpty()).toEqual(true);
	expect(await aDAndAB.isEmpty()).toEqual(false);

	expect(await aAndB.count()).toEqual(0);
	expect(await aAndA.count()).toEqual(1);
	expect(await aAndD.count()).toEqual(0);
	expect(await aBAndEmpty.count()).toEqual(0);
	expect(await aDAndAB.count()).toEqual(1);
	});

	test('filter', async () => {
	const keys = {
	num: Num,
	char: Str,
	};

	const a: Event<typeof keys> = {
	id: 'a',
	num: 97,
	char: 'a',
	};
	const b: Event<typeof keys> = {
	id: 'b',
	num: 98,
	char: 'b',
	};
	const d: Event<typeof keys> = {
	id: 'd',
	num: 100,
	char: 'd',
	};

	const events = new ConcreteEventSet(keys, [a, b, d]);


	const justA = events.filter(eq(v('id'), c('a')));
	const justD = events.filter(eq(v('num'), c(100)));

	expect((await justA.materialise(keys)).events).toEqual([a]);
	expect((await justD.materialise(keys)).events).toEqual([d]);
	});

	test('sort', async () => {
	const keys = {
	num: Num,
	char: Str,
	};

	const a: Event<typeof keys> = {
	id: 'a',
	num: 97,
	char: 'a',
	};
	const b: Event<typeof keys> = {
	id: 'b',
	num: 98,
	char: 'b',
	};
	const d: Event<typeof keys> = {
	id: 'd',
	num: 100,
	char: 'd',
	};

	const events = new ConcreteEventSet(keys, [a, b, d]);


	const byNum = events.sort({
	expression: v('num'),
	direction: Direction.ASC,
	});
	const byStr = events.sort({
	expression: v('char'),
	direction: Direction.ASC,
	});

	expect((await byNum.materialise(keys)).events).toEqual([a, b, d]);
	expect((await byStr.materialise(keys)).events).toEqual([a, b, d]);
	});

	test('sort desc', async () => {
	const keys = {
	num: Num,
	char: Str,
	};

	const a: Event<typeof keys> = {
	id: 'a',
	num: 97,
	char: 'a',
	};
	const b: Event<typeof keys> = {
	id: 'b',
	num: 98,
	char: 'b',
	};
	const d: Event<typeof keys> = {
	id: 'd',
	num: 100,
	char: 'd',
	};

	const events = new ConcreteEventSet(keys, [a, b, d]);


	const byNum = events.sort({
	expression: v('num'),
	direction: Direction.DESC,
	});
	const byStr = events.sort({
	expression: v('char'),
	direction: Direction.DESC,
	});

	expect((await byNum.materialise(keys)).events).toEqual([d, b, a]);
	expect((await byStr.materialise(keys)).events).toEqual([d, b, a]);
	});
	});
	});

	describe('cmpFromExpr', () => {
	test('simple', () => {
	const a: UntypedEvent = {
	id: 'a',
	x: 0,
	};
	const b: UntypedEvent = {
	id: 'b',
	x: 42,
	};
	const c: UntypedEvent = {
	id: 'c',
	x: 0,
	};

	const cmp = cmpFromExpr(v('x'));
	expect(cmp(a, b)).toEqual(-1);
	expect(cmp(a, a)).toEqual(0);
	expect(cmp(b, a)).toEqual(1);
	expect(cmp(a, c)).toEqual(0);
	});

	test('kinds', () => {
	const nullEvent: UntypedEvent = {
	id: 'nullEvent',
	x: null,
	};
	const sevenEvent: UntypedEvent = {
	id: 'sevenEvent',
	x: 7,
	};
	const oneEvent: UntypedEvent = {
	id: 'oneEvent',
	x: 1,
	};
	const zeroEvent: UntypedEvent = {
	id: 'zeroEvent',
	x: 0,
	};
	const trueEvent: UntypedEvent = {
	id: 'trueEvent',
	x: true,
	};
	const falseEvent: UntypedEvent = {
	id: 'falseEvent',
	x: false,
	};
	const aardvarkEvent: UntypedEvent = {
	id: 'aardvarkEvent',
	x: 'aardvark',
	};
	const zigguratEvent: UntypedEvent = {
	id: 'zigguratEvent',
	x: 'ziggurat',
	};
	const bigZeroEvent: UntypedEvent = {
	id: 'bigZeroEvent',
	x: 0n,
	};
	const bigOneEvent: UntypedEvent = {
	id: 'bigOneEvent',
	x: 1n,
	};
	const bigTwoEvent: UntypedEvent = {
	id: 'bigTwoEvent',
	x: 2n,
	};

	const cmp = cmpFromExpr(v('x'));

	// Everything is equal to itself:
	expect(cmp(nullEvent, nullEvent)).toEqual(0);
	expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
	expect(cmp(oneEvent, oneEvent)).toEqual(0);
	expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(falseEvent, falseEvent)).toEqual(0);
	expect(cmp(trueEvent, trueEvent)).toEqual(0);
	expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
	expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
	expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

	// BigInt(x) == x
	expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

	// one = true, zero = false:
	expect(cmp(oneEvent, trueEvent)).toEqual(0);
	expect(cmp(zeroEvent, falseEvent)).toEqual(0);
	expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

	// 0 < 1 < 7
	expect(cmp(zeroEvent, oneEvent)).toEqual(-1);
	expect(cmp(sevenEvent, oneEvent)).toEqual(1);

	// 0n < 1n < 2n
	expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(-1);
	expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(1);

	// 0 < 1n < 7
	expect(cmp(zeroEvent, bigOneEvent)).toEqual(-1);
	expect(cmp(sevenEvent, bigOneEvent)).toEqual(1);

	// aardvark < ziggurat
	expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(-1);

	// null < {bools, numbers, BigInt} < strings
	expect(cmp(nullEvent, falseEvent)).toEqual(-1);
	expect(cmp(aardvarkEvent, sevenEvent)).toEqual(1);
	expect(cmp(nullEvent, bigZeroEvent)).toEqual(-1);
	expect(cmp(bigZeroEvent, sevenEvent)).toEqual(-1);
	expect(cmp(nullEvent, falseEvent)).toEqual(-1);
	expect(cmp(falseEvent, sevenEvent)).toEqual(-1);
	});
	});

	describe('cmpFromSort', () => {
	test('simple asc', () => {
	const a: UntypedEvent = {
	id: 'a',
	x: 0,
	};
	const b: UntypedEvent = {
	id: 'b',
	x: 42,
	};
	const c: UntypedEvent = {
	id: 'c',
	x: 0,
	};

	const cmp = cmpFromSort({
	expression: v('x'),
	direction: Direction.ASC,
	});
	expect(cmp(a, b)).toEqual(-1);
	expect(cmp(a, a)).toEqual(0);
	expect(cmp(b, a)).toEqual(1);
	expect(cmp(a, c)).toEqual(0);
	});

	test('kinds asc', () => {
	const nullEvent: UntypedEvent = {
	id: 'nullEvent',
	x: null,
	};
	const sevenEvent: UntypedEvent = {
	id: 'sevenEvent',
	x: 7,
	};
	const oneEvent: UntypedEvent = {
	id: 'oneEvent',
	x: 1,
	};
	const zeroEvent: UntypedEvent = {
	id: 'zeroEvent',
	x: 0,
	};
	const trueEvent: UntypedEvent = {
	id: 'trueEvent',
	x: true,
	};
	const falseEvent: UntypedEvent = {
	id: 'falseEvent',
	x: false,
	};
	const aardvarkEvent: UntypedEvent = {
	id: 'aardvarkEvent',
	x: 'aardvark',
	};
	const zigguratEvent: UntypedEvent = {
	id: 'zigguratEvent',
	x: 'ziggurat',
	};
	const bigZeroEvent: UntypedEvent = {
	id: 'bigZeroEvent',
	x: 0n,
	};
	const bigOneEvent: UntypedEvent = {
	id: 'bigOneEvent',
	x: 1n,
	};
	const bigTwoEvent: UntypedEvent = {
	id: 'bigTwoEvent',
	x: 2n,
	};

	const cmp = cmpFromSort({
	expression: v('x'),
	direction: Direction.ASC,
	});

	// Everything is equal to itself:
	expect(cmp(nullEvent, nullEvent)).toEqual(0);
	expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
	expect(cmp(oneEvent, oneEvent)).toEqual(0);
	expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(falseEvent, falseEvent)).toEqual(0);
	expect(cmp(trueEvent, trueEvent)).toEqual(0);
	expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
	expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
	expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

	// BigInt(x) == x
	expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

	// one = true, zero = false:
	expect(cmp(oneEvent, trueEvent)).toEqual(0);
	expect(cmp(zeroEvent, falseEvent)).toEqual(0);
	expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

	// 0 < 1 < 7
	expect(cmp(zeroEvent, oneEvent)).toEqual(-1);
	expect(cmp(sevenEvent, oneEvent)).toEqual(1);

	// 0n < 1n < 2n
	expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(-1);
	expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(1);

	// 0 < 1n < 7
	expect(cmp(zeroEvent, bigOneEvent)).toEqual(-1);
	expect(cmp(sevenEvent, bigOneEvent)).toEqual(1);

	// aardvark < ziggurat
	expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(-1);

	// null < {bools, numbers, BigInt} < strings
	expect(cmp(nullEvent, falseEvent)).toEqual(-1);
	expect(cmp(aardvarkEvent, sevenEvent)).toEqual(1);
	expect(cmp(nullEvent, bigZeroEvent)).toEqual(-1);
	expect(cmp(bigZeroEvent, sevenEvent)).toEqual(-1);
	expect(cmp(nullEvent, falseEvent)).toEqual(-1);
	expect(cmp(falseEvent, sevenEvent)).toEqual(-1);
	});

	test('simple desc', () => {
	const a: UntypedEvent = {
	id: 'a',
	x: 0,
	};
	const b: UntypedEvent = {
	id: 'b',
	x: 42,
	};
	const c: UntypedEvent = {
	id: 'c',
	x: 0,
	};

	const cmp = cmpFromSort({
	expression: v('x'),
	direction: Direction.DESC,
	});
	expect(cmp(a, b)).toEqual(1);
	expect(cmp(a, a)).toEqual(0);
	expect(cmp(b, a)).toEqual(-1);
	expect(cmp(a, c)).toEqual(0);
	});

	test('kinds desc', () => {
	const nullEvent: UntypedEvent = {
	id: 'nullEvent',
	x: null,
	};
	const sevenEvent: UntypedEvent = {
	id: 'sevenEvent',
	x: 7,
	};
	const oneEvent: UntypedEvent = {
	id: 'oneEvent',
	x: 1,
	};
	const zeroEvent: UntypedEvent = {
	id: 'zeroEvent',
	x: 0,
	};
	const trueEvent: UntypedEvent = {
	id: 'trueEvent',
	x: true,
	};
	const falseEvent: UntypedEvent = {
	id: 'falseEvent',
	x: false,
	};
	const aardvarkEvent: UntypedEvent = {
	id: 'aardvarkEvent',
	x: 'aardvark',
	};
	const zigguratEvent: UntypedEvent = {
	id: 'zigguratEvent',
	x: 'ziggurat',
	};
	const bigZeroEvent: UntypedEvent = {
	id: 'bigZeroEvent',
	x: 0n,
	};
	const bigOneEvent: UntypedEvent = {
	id: 'bigOneEvent',
	x: 1n,
	};
	const bigTwoEvent: UntypedEvent = {
	id: 'bigTwoEvent',
	x: 2n,
	};

	const cmp = cmpFromSort({
	expression: v('x'),
	direction: Direction.DESC,
	});

	// Everything is equal to itself:
	expect(cmp(nullEvent, nullEvent)).toEqual(0);
	expect(cmp(sevenEvent, sevenEvent)).toEqual(0);
	expect(cmp(oneEvent, oneEvent)).toEqual(0);
	expect(cmp(zeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(falseEvent, falseEvent)).toEqual(0);
	expect(cmp(trueEvent, trueEvent)).toEqual(0);
	expect(cmp(aardvarkEvent, aardvarkEvent)).toEqual(0);
	expect(cmp(zigguratEvent, zigguratEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, bigZeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, bigOneEvent)).toEqual(0);
	expect(cmp(bigTwoEvent, bigTwoEvent)).toEqual(0);

	// BigInt(x) == x
	expect(cmp(bigZeroEvent, zeroEvent)).toEqual(0);
	expect(cmp(bigOneEvent, oneEvent)).toEqual(0);

	// one = true, zero = false:
	expect(cmp(oneEvent, trueEvent)).toEqual(0);
	expect(cmp(zeroEvent, falseEvent)).toEqual(0);
	expect(cmp(bigOneEvent, trueEvent)).toEqual(0);
	expect(cmp(bigZeroEvent, falseEvent)).toEqual(0);

	// 0 < 1 < 7
	expect(cmp(zeroEvent, oneEvent)).toEqual(1);
	expect(cmp(sevenEvent, oneEvent)).toEqual(-1);

	// 0n < 1n < 2n
	expect(cmp(bigZeroEvent, bigOneEvent)).toEqual(1);
	expect(cmp(bigTwoEvent, bigOneEvent)).toEqual(-1);

	// 0 < 1n < 7
	expect(cmp(zeroEvent, bigOneEvent)).toEqual(1);
	expect(cmp(sevenEvent, bigOneEvent)).toEqual(-1);

	// aardvark < ziggurat
	expect(cmp(aardvarkEvent, zigguratEvent)).toEqual(1);

	// null < {bools, numbers, BigInt} < strings
	expect(cmp(nullEvent, falseEvent)).toEqual(1);
	expect(cmp(aardvarkEvent, sevenEvent)).toEqual(-1);
	expect(cmp(nullEvent, bigZeroEvent)).toEqual(1);
	expect(cmp(bigZeroEvent, sevenEvent)).toEqual(1);
	expect(cmp(nullEvent, falseEvent)).toEqual(1);
	expect(cmp(falseEvent, sevenEvent)).toEqual(1);
	});
	});