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limitToLast.e2e.js
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limitToLast.e2e.js
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/*
* Copyright (c) 2016-present Invertase Limited & Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this library 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.
*
*/
const { PATH, seed, wipe } = require('../helpers');
const TEST_PATH = `${PATH}/limitToLast`;
describe('database().ref().limitToLast()', function () {
before(async function () {
await seed(TEST_PATH);
});
after(async function () {
await wipe(TEST_PATH);
});
describe('v8 compatibility', function () {
it('throws if limit is invalid', async function () {
try {
await firebase.database().ref().limitToLast('foo');
return Promise.reject(new Error('Did not throw an Error.'));
} catch (error) {
error.message.should.containEql("'limit' must be a positive integer value");
return Promise.resolve();
}
});
it('throws if limit has already been set', async function () {
try {
await firebase.database().ref().limitToFirst(3).limitToLast(2);
return Promise.reject(new Error('Did not throw an Error.'));
} catch (error) {
error.message.should.containEql(
'Limit was already set (by another call to limitToFirst, or limitToLast)',
);
return Promise.resolve();
}
});
it('returns a limited array data set', async function () {
const ref = firebase.database().ref(`${TEST_PATH}`);
const initial = {
0: 'foo',
1: 'bar',
2: 'baz',
};
await ref.set(initial);
return ref
.limitToLast(2)
.once('value')
.then(snapshot => {
snapshot.val().should.eql(jet.contextify([null, 'bar', 'baz']));
return Promise.resolve();
});
});
it('returns a limited object data set', async function () {
const ref = firebase.database().ref(`${TEST_PATH}`);
const initial = {
a: 'foo',
b: 'bar',
c: 'baz',
};
await ref.set(initial);
return ref
.limitToLast(2)
.once('value')
.then(snapshot => {
snapshot.val().should.eql(
jet.contextify({
b: 'bar',
c: 'baz',
}),
);
return Promise.resolve();
});
});
it('returns a null value when not possible to limit', async function () {
const ref = firebase.database().ref(`${TEST_PATH}`);
const initial = 'foo';
await ref.set(initial);
return ref
.limitToFirst(2)
.once('value')
.then(snapshot => {
should.equal(snapshot.val(), null);
return Promise.resolve();
});
});
});
describe('modular', function () {
it('throws if limit is invalid', async function () {
const { getDatabase, ref, limitToLast, query } = databaseModular;
try {
query(ref(getDatabase()), limitToLast('foo'));
return Promise.reject(new Error('Did not throw an Error.'));
} catch (error) {
error.message.should.containEql("'limit' must be a positive integer value");
return Promise.resolve();
}
});
it('throws if limit has already been set', async function () {
const { getDatabase, ref, limitToLast, limitToFirst, query } = databaseModular;
try {
query(ref(getDatabase()), limitToFirst(3), limitToLast(2));
return Promise.reject(new Error('Did not throw an Error.'));
} catch (error) {
error.message.should.containEql(
'Limit was already set (by another call to limitToFirst, or limitToLast)',
);
return Promise.resolve();
}
});
it('returns a limited array data set', async function () {
const { getDatabase, ref, set, get, limitToLast, query } = databaseModular;
const dbRef = ref(getDatabase(), `${TEST_PATH}`);
const initial = {
0: 'foo',
1: 'bar',
2: 'baz',
};
await set(dbRef, initial);
return get(query(dbRef, limitToLast(2))).then(snapshot => {
snapshot.val().should.eql(jet.contextify([null, 'bar', 'baz']));
return Promise.resolve();
});
});
it('returns a limited object data set', async function () {
const { getDatabase, ref, set, get, limitToLast, query } = databaseModular;
const dbRef = ref(getDatabase(), `${TEST_PATH}`);
const initial = {
a: 'foo',
b: 'bar',
c: 'baz',
};
await set(dbRef, initial);
return get(query(dbRef, limitToLast(2))).then(snapshot => {
snapshot.val().should.eql(
jet.contextify({
b: 'bar',
c: 'baz',
}),
);
return Promise.resolve();
});
});
it('returns a null value when not possible to limit', async function () {
const { getDatabase, ref, set, get, limitToLast, query } = databaseModular;
const dbRef = ref(getDatabase(), `${TEST_PATH}`);
const initial = 'foo';
await set(dbRef, initial);
return get(query(dbRef, limitToLast(2))).then(snapshot => {
should.equal(snapshot.val(), null);
return Promise.resolve();
});
});
});
});