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@file:Suppress("NonAsciiCharacters")

sealed class Either<out A, out B>
data class Left<out A> constructor(val value: A) : Either<A, Nothing>()
data class Right<out B> constructor(val value: B) : Either<Nothing, B>()

typealias `∧`<φ, ψ> = Pair<φ, ψ>

typealias `∨`<φ, ψ> = Either<φ, ψ>

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const loadSpec = async () => ({
    given: () => "I have 100 shares of MSFT stock",
    when:  () => "When I ask to sell 20 shares of MSFT stock",
    then:  () => "Then I should have 80 shares of MSFT stock"
})

const printSpec = async () => {
    const { given, when, then } = await loadSpec()
    console.log(given())
    console.log(when())

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// Implementation of DAGs based on:
// Jeremy Gibbons, An Initial-Algebra Approach to Directed Acyclic Graphs, 1995
// https://www.researchgate.net/publication/2423982_An_Initial-Algebra_Approach_to_Directed_Acyclic_Graphs
//
// Good:
// ✅ Immutable, compositional representation that supports structural sharing
// ✅ Correct by construction: no way to create cyclic graphs, so no need to check
// ✅ Some graph operations are easy: topological sort, certain replacement graph transformations
// ✅ Cool underlying theory: graphs are arrows in a symmetric monoidal category
// ⚠️ Extensions to the default idea of a DAG: supports multiple edges between the same vertices, ordered ports, and

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══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following assertion was thrown running a test:
'dart:ui/hash_codes.dart': Failed assertion: line 15: '<optimized out>': is not true.

Either the assertion indicates an error in the framework itself, or we should provide substantially
more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=BUG.md

When the exception was thrown, this was the stack:

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class AsyncSerializer {
  constructor() {
    this._previousPromise = Promise.resolve(null)
  }

  serialize = f => {
    const newPromise = this._previousPromise.then(() => f())
    this._previousPromise = newPromise
    return newPromise
  }

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import React from 'react'
import { shallow } from 'enzyme'

const flushPromises = () => new Promise(resolve => setImmediate(resolve))

const fetchTheData = jest.fn()

class MyContainerComponent extends React.Component {
  state = { error: null }

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package gems.user.service

import com.google.inject.ImplementedBy
import com.google.inject.Inject
import gems.user.dao.UserDao
import gems.user.dao.entity.User
import gems.user.service.dto.Credentials
import gems.user.service.session.Session
import gems.user.service.session.SessionManager

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backend     | 15:51:16.951 [main] DEBUG Application - Class Loader: sun.misc.Launcher$AppClassLoader@75b84c92: [/home/gradle/app/backend/build/classes/java/main, /home/gradle/app/backend/build/classes/kotlin/main/, /home/gradle/app/backend/build/resources/main/, /home/gradle/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-server-netty/0.9.2/3ec623b4e61942af1968f44adf00ed14411705f3/ktor-server-netty-0.9.2.jar, /home/gradle/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-auth-jwt/0.9.2/e156bae7c5e75a2492822c7ebfb4611a51c09b55/ktor-auth-jwt-0.9.2.jar, /home/gradle/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-auth/0.9.2/cc9bcc5bd3fd1604071c6f25aa42fc3dfa9c615c/ktor-auth-0.9.2.jar, /home/gradle/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-jackson/0.9.2/424f4a16296755e21219d65190e03eac53b0843b/ktor-jackson-0.9.2.jar, /home/gradle/.gradle/caches/modules-2/files-2.1/org.mpierce.ktor.csrf/ktor-csrf/0.3.0/defdb620ad156ac64c265f0dcf3bdd1fb78f2bb9/ktor-csrf-0.3.0.jar, /home/gradle/.gradle/caches/modules-2/files-2.1

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strictfp \u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0063\u006c\u0061\u0073\u0073\u0020\u0052\u0065\u0066\u0075\u0063\u0074\u0020\u007b
\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu0020
    interface λ<A, B> {
        public B call(A x);
    }

    interface RecursiveFunc<F> extends λ<RecursiveFunc<F>, F> {
    }

    private static boolean isDivisibleBy(int n, final int m) {

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val graph = DAG.empty[String]
val graph2 = graph.addVertex("Foo")
val graph3 = graph2.addEdge("Foo", "Bar")
val graph4 = graph3.addEdge("Baz", "Quux")
val graph5 = graph4.removeEdge("Baz", "Quux")
val graph6 = graph5.addEdge("Foo", "Baz")
val graph7 = graph6.addEdge("Bar" -> "Quux").addEdge("Baz" -> "Quux")
graph: DAG[String] =