jvmMain.base.event.testCase.EventMatchers.kt Maven / Gradle / Ivy

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/*
 * Copyright (c) 2019. JetBrains s.r.o.
 * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 */

package jetbrains.datalore.base.event.testCase

import jetbrains.datalore.base.observable.event.EventHandler
import jetbrains.datalore.base.observable.event.EventSource
import jetbrains.datalore.base.observable.property.PropertyChangeEvent
import org.hamcrest.CoreMatchers
import org.hamcrest.Description
import org.hamcrest.Matcher
import org.hamcrest.TypeSafeDiagnosingMatcher

object EventMatchers {

    fun  setTestHandler(source: EventSource): MatchingHandler {
        val handler = MatchingHandler()
        source.addHandler(handler)
        return handler
    }

    fun  noEvents(): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: MatchingHandler, mismatchDescription: Description): Boolean {
                if (item.events.isEmpty()) {
                    return true
                } else {
                    mismatchDescription.appendText("events happened: " + item.events)
                    return false
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("no events")
            }
        }
    }

    fun  anyEvents(): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: MatchingHandler, mismatchDescription: Description): Boolean {
                if (item.events.isEmpty()) {
                    mismatchDescription.appendText("no events happened")
                    return false
                } else {
                    return true
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("any events")
            }
        }
    }

    fun  singleEvent(valueMatcher: Matcher): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: MatchingHandler, mismatchDescription: Description): Boolean {
                if (item.events.isEmpty()) {
                    mismatchDescription.appendText("no events happened")
                    return false
                } else if (item.events.size == 1) {
                    val value = item.events[0]
                    if (valueMatcher.matches(value)) {
                        return true
                    } else {
                        mismatchDescription.appendText("value ")
                        valueMatcher.describeMismatch(value, mismatchDescription)
                        return false
                    }
                } else {
                    mismatchDescription.appendText("few events happened: " + item.events)
                    return false
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("only event ").appendDescriptionOf(valueMatcher)
            }
        }
    }

    fun  lastEvent(valueMatcher: Matcher): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: MatchingHandler, mismatchDescription: Description): Boolean {
                if (item.events.isEmpty()) {
                    mismatchDescription.appendText("no events happened")
                    return false
                } else {
                    val value = item.events[item.events.size - 1]
                    if (valueMatcher.matches(value)) {
                        return true
                    } else {
                        mismatchDescription.appendText("last value ")
                        valueMatcher.describeMismatch(value, mismatchDescription)
                        return false
                    }
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("last event ").appendDescriptionOf(valueMatcher)
            }
        }
    }

    fun  allEvents(valuesMatcher: Matcher>): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: MatchingHandler, mismatchDescription: Description): Boolean {
                if (valuesMatcher.matches(item.events)) {
                    return true
                } else {
                    mismatchDescription.appendText("handled events ")
                    valuesMatcher.describeMismatch(item.events, mismatchDescription)
                    return false
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("events ").appendDescriptionOf(valuesMatcher)
            }
        }
    }

    fun  newValue(valueMatcher: Matcher): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: PropertyChangeEvent, mismatchDescription: Description): Boolean {
                if (valueMatcher.matches(item.newValue)) {
                    return true
                } else {
                    mismatchDescription.appendText("new value ")
                    valueMatcher.describeMismatch(item.newValue, mismatchDescription)
                    return false
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("new value ").appendDescriptionOf(valueMatcher)
            }
        }
    }

    fun  newValueIs(value: ValueT): Matcher> {
        return newValue(CoreMatchers.`is`(value))
    }

    fun  oldValue(valueMatcher: Matcher): Matcher> {
        return object : TypeSafeDiagnosingMatcher>() {
            override fun matchesSafely(item: PropertyChangeEvent, mismatchDescription: Description): Boolean {
                if (valueMatcher.matches(item.oldValue)) {
                    return true
                } else {
                    mismatchDescription.appendText("old value ")
                    valueMatcher.describeMismatch(item.oldValue, mismatchDescription)
                    return false
                }
            }

            override fun describeTo(description: Description) {
                description.appendText("old value ").appendDescriptionOf(valueMatcher)
            }
        }
    }

    fun  oldValueIs(value: ValueT): Matcher> {
        return oldValue(CoreMatchers.`is`(value))
    }

    class MatchingHandler : EventHandler {
        internal val events = ArrayList()

        override fun onEvent(event: EventT) {
            events.add(event)
        }
    }
}