Test Driven Development

Contains two exercises:

Standalone Test driven development exercise utilising JUnit provided by trainer. (Question)

Test driven development exercise found on QA community. (Email)

Questions Exercise

multiChar

Given a string, return a string where for every char in the original string, there are three chars.

For Example:
- multChar("The") → "TTThhheee"
- multChar("AAbb") → "AAAAAAbbbbbb"
- multChar("Hi-There") → "HHHiii---TTThhheeerrreee"
sandwichFilling

Return the string (backwards) that is between the first and last appearance
of "bread" in the given string, or return the empty string "" if there is not
2 occurances of "bread". Ignore Case.

For Example:
- sandwichFilling("breadclivebread") → "evilc"
- sandwichFilling("xxbreadfridgebreadyy") → "egdirf"
- sandwichFilling("xxBreadfridgeBReAdyy") → "egdirf"
- sandwichFilling("xxbreadyy") → "" sandwichFilling("xxbreADyy") → "" HINT: "a" == "a" if false HINT: "a".equals("a") is true
evenlySpaced

Given three ints, a b c, one of them is small, one is medium and one is
large. Return true if the three values are evenly spaced, so the difference
between small and medium is the same as the difference between medium and
large. Do not assume the ints will come to you in a reasonable order.

For Example:
- evenlySpaced(2, 4, 6) → true
- evenlySpaced(4, 6, 2) → true
- evenlySpaced(4, 6, 3) → false
- evenlySpaced(4, 60, 9) → false
nMid

Given a string and an int n, return a string that removes n letters from the'middle' of the string. The string length will be at least n. The input string will have an odd number of letters. n will always be an odd number.

For Example:
- nMid("Hello", 3) → "Ho"
- nMid("Chocolate", 3) → "Choate"
- nMid("Chocolate", 1) → "Choclate"
endsJava

Given a string, return the boolean True if it ends in "java" and False if does not end in "java". Ignore Case.

For Example:
- endsJava("ilovejava") → true
- endsJava("iloveJaVa") → true
- endsJava("welovejava") → true
- endsJava("welovejavamoreeveryday") → false
- endsJava("javaiscool") → false
- endsJava("pythoniscool") → false
superBlock

Given a string, return the length of the largest "block" in the string. A block is a run of adjacent chars that are the same, do not ignore case.

For Example:
- superBlock("hooopplla") → 3
- superBlock("abbCCCddDDDDeeEEE") → 4
- superBlock("abbCCCCC")) → 5
- superBlock("") → 0
HINT: "a" == "a" if false HINT: "a".equals("a") is true
amISearch

Given a string - return the number of times "am" appears in the String ignoring case - BUT ONLY WHEN the word "am" appears without being followed or preceded by other letters.

For Example:
- amISearch("Am I in Amsterdam") → 1
- amISearch("I am in Amsterdam am I?") → 2
- amISearch("I have been in Amsterdam") → 0 HINT: String.toLowerCase
fizzBuzz

Given a number if this number is divisible by 3 return "fizz" if this number is divisible by 5 return "buzz" if this number is divisible by both 3 and 5 return "fizzbuzz" if this number is not divisible by 3 or 5 return null.

For Example:

fizzBuzz(3) → "fizz"

fizzBuzz(10) → "buzz"

fizzBuzz(15) → "fizzbuzz"

fizzBuzz(8) → null
largest

Given a string, split the string into the individual numbers present then add each digit of each number to get a final value for each number.

String example = "55 72 86" "55" will = the integer 10 "72" will = the integer 9 "86" will = the integer 14 You then need to return the highest vale

For Example:
- largest("55 72 86") → 14
- largest("15 72 80 164") → 11
- largest("555 72 86 45 10") → 15 HINT: Integer.parseInt
compares

Given a string, int and a char, return a boolean value if the 'nth' (represented by the int provided) char of the String supplied is the same as the char supplied. The int provided will NOT always be less than than the length of the String. Ignore case and Whitespace.

For Example:
- compares("The",2,'h') → true
- compares("AAbb",1,'b') → false
- compares("Hi-There",10,'e') → false
HINT: String.charAt

Test Driven Development Exercise

Using the following test class, write the code needed to fulfill each test class so that it passes. The method should check that the String value passed to it is a valid email address.

import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

public class EmailTest {

    private Email email;

    @Before
    public void setUp() {
        email = new Email();
    }

    @Test
    public void testIsValidEmailGreenPath() {
        boolean actual = email.isValidEmail("firstName.surname@qa.com");
        assertTrue(actual);
    }

    @Test
    public void testIsValidEmailGreenPathDifferentDomainName() {
        boolean actual = email.isValidEmail("firstNameSurname@gmail.com");
        assertTrue(actual);
    }

    @Test
    public void testIsValidEmailRedPathDomainTooLong() {
        boolean actual = email.isValidEmail("firstName.surname@qa.helloWorld");
        assertFalse(actual);
    }

    @Test
    public void testIsValidEmailRedPathNoAddress() {
        boolean actual = email.isValidEmail("@qa.com");
        assertFalse(actual);
    }

    @Test
    public void testIsValidEmailRedPathNoDomainName() {
        boolean actual = email.isValidEmail("firstName.surname@com");
        assertFalse(actual);
    }

    @Test
    public void testIsValidEmailRedPathSpecialCharacterAtBeginning() {
        boolean actual = email.isValidEmail("_firstName.surname@qa.com");
        assertFalse(actual);
    }

    @Test
    public void testIsValidEmailRedPathSpecialCharacterAtEnd() {
        boolean actual = email.isValidEmail("firstName.surname@qa.com)");
        assertFalse(actual);
    }
}

TimothyOwen/test_driven_development

Test Driven Development

Contains two exercises:

Questions Exercise

Test Driven Development Exercise