104 lines
3.4 KiB
Kotlin
104 lines
3.4 KiB
Kotlin
import jetbrains.mps.logic.reactor.logical.LogicalObserver
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import jetbrains.mps.logic.reactor.logical.Logical
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import org.junit.Test
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/*
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* Copyright 2014-2019 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Fedor Isakov
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*/
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class TestLogical {
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class Observer(logical: Logical<*>) : LogicalObserver {
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var parentUpdated: Pair<Logical<*>, Logical<*>>? = null
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var valueUpdated: Pair<Logical<*>, Any>? = null
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init {
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logical.addObserver(this)
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}
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override fun valueUpdated(logical: Logical<*>) {
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if (valueUpdated != null)
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throw IllegalStateException("value already assigned")
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else
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valueUpdated = logical to logical.findRoot().value()
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}
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override fun parentUpdated(logical: Logical<*>) {
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parentUpdated = logical to logical.findRoot()
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}
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}
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@Test
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fun union_notifies_observers() {
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val xLogical = logical<String>("X")
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val yLogical = logical<String>("Y")
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val zLogical = logical<String>("Z")
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val observerX = Observer(xLogical)
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val observerY = Observer(yLogical)
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val observerZ = Observer(zLogical)
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// the logical on the left has higher rank
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yLogical.union(xLogical)
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observerX.parentUpdated shouldBe (xLogical to yLogical)
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observerY.parentUpdated shouldBe (null)
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// now logical on the right has higher rank
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zLogical.union(xLogical)
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observerZ.parentUpdated shouldBe (zLogical to yLogical)
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observerY.parentUpdated shouldBe (null)
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// should not fail
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yLogical.union(zLogical)
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}
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@Test
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fun assigned_logical_has_higher_rank() {
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val xLogical = logical<String>("X")
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val yLogical = logical<String>("Y")
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val observerX = Observer(xLogical)
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val observerY = Observer(yLogical)
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xLogical.union(yLogical)
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observerY.parentUpdated shouldBe (yLogical to xLogical)
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observerX.parentUpdated shouldBe (null)
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yLogical.findRoot() shouldBeSame xLogical
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yLogical.findRoot().setValue("foobar")
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observerX.valueUpdated shouldBe (xLogical to "foobar")
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observerY.valueUpdated shouldBe (yLogical to "foobar")
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val zLogical = logical<String>("Z")
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val wLogical = logical<String>("W")
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val observerZ = Observer(zLogical)
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val observerW = Observer(wLogical)
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zLogical.union(wLogical)
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observerW.parentUpdated shouldBe (wLogical to zLogical)
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observerZ.parentUpdated shouldBe (null)
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zLogical.union(yLogical)
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zLogical.findRoot() shouldBeSame xLogical
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observerZ.parentUpdated shouldBe (zLogical to xLogical)
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observerW.parentUpdated shouldBe (wLogical to xLogical)
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observerZ.valueUpdated shouldBe (zLogical to "foobar")
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observerW.valueUpdated shouldBe (wLogical to "foobar")
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}
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} |