con_cat

Given two strings, append them together (known as “concatenation”) and return the result. However, if the concatenation creates a double-char, then omit one of the chars, so “abc” and “cat” yields “abcat”.

con_cat("abc", "cat") -> "abcat"
con_cat("dog", "cat") -> "dogcat"
con_cat("abc", "") -> "abc"

This exercise was taken from codingbat.com and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.

Starter Code

def con_cat(a: str, b: str) -> str:
    pass


result = con_cat('abc', 'cat')
print(result)

Tests

from main import con_cat


def test_con_cat_1():
    assert con_cat('abc', 'cat') == 'abcat'


def test_con_cat_2():
    assert con_cat('dog', 'cat') == 'dogcat'


def test_con_cat_3():
    assert con_cat('abc', '') == 'abc'


def test_con_cat_4():
    assert con_cat('', 'cat') == 'cat'


def test_con_cat_5():
    assert con_cat('pig', 'g') == 'pig'


def test_con_cat_6():
    assert con_cat('pig', 'doggy') == 'pigdoggy'