Test a function: Difference between revisions

=={{header|Lasso}}==

The following example uses the [https://bitbucket.org/bfad/lspec/ LSpec Library]:

<lang lasso>// Taken from the Lasso entry in Palindrome page

define isPalindrome(text::string) => {

local(_text = string(#text)) // need to make copy to get rid of reference issues

#_text -> replace(regexp(`(?:$|\W)+`), -ignorecase)

local(reversed = string(#_text))

#reversed -> reverse

return #_text == #reversed

}

// The tests

describe(::isPalindrome) => {

it(`throws an error when not passed a string`) => {

expect->error =>{

isPalindrome(43)

}

}

it(`returns true if the string is the same forward and backwords`) => {

expect(isPalindrome('abba'))

}

it(`returns false if the string is different forward and backwords`) => {

expect(not isPalindrome('aab'))

}

it(`ignores spaces and punctuation`) => {

expect(isPalindrome(`Madam, I'm Adam`))

}

}

// Run the tests and get the summary

// (This normally isn't in the code as the test suite is run via command-line.)

lspec->stop</lang>

{{out}}

<pre>....

Finished in 0.157030 seconds

4 tests, 0 failures</pre>