Spock Test

FirstTestSpec.groovy

package com.paxier.currencyexchange.controller

import spock.lang.Specification

class FirstTestSpec extends Specification {

    def "one plus one should be two"() {
        expect:
         1 + 1 == 2
    }

    def "two plus two should be equals to four"() {
        given:
            int left = 2
            int right = 2

        when:
            int result = left + right

        then:
            result == 40
    }

    def "Should be able to remove from List"() {
        given:
            def list = [1,2,3,4]

        when:
            list.remove(0)

        then:
            list == [2,3,4]
    }

    def "Should get index out of bound when removing non-existing items"() {
        given:
        def list = [1,2,3,4]

        when:
        list.remove(10)

        then:
        thrown(IndexOutOfBoundsException)
        list.size() == 4
    }

    def "numbers to the power of two"(
            int a,
            int b,
            int c
    ) {
        expect:
            Math.pow(a, b) == c

        where:
            a | b | c
            1 | 2 | 1
            2 | 2 | 4
            3 | 2 | 10
    }
}