Learn how to design and write a meaningful failing unit test.
- [Instructor] So now we're going to move…the NCrunch Tests window over here,…just so we can kind of keep an eye on it,…and I'm going to close my Solution Explorer just for now.…In fact, we're just going to unpin it.…So we can kind of keep an eye on what's going on,…and I'm not showing parsing tests at the moment,…so let's show parsing tests, there we go.…It looks, by the way, like our main bot program failed…to build, so let's just see what's going on with that,…and it's just a naming issue.…
So just to get that rammed up for now,…I'm going to reopen my Solution Explorer,…and I'm just going to rename our main function,…so that build error has now disappeared…from our NCrunch Tests window.…It's not a thing we're actually testing at the moment,…but we might as well tidy that up now.…So let's now go ahead and write some real tests.…Remember, we're working on the parser,…and I'm going to be slightly naughty and skip ahead…to the happy path.…Normally, when I'm writing unit tests,…I try and write a bunch of tests for failing paths…
Author
Kit Eason
Released
12/20/2016- Defining values and calling functions in F#
- Defining and identifying discriminated unions
- Working with if-else expressions
- Writing unit test
- Using type providers to access data
- Analyzing data with collection functions
- Plotting data using the R type provider
- Using railway-oriented programming to handle errors
- Integrating with Twitter
- Deploying an F# application to Azure
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome59s
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Exercise files41s
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1. Get Started with F#
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Record type and arrays2m 35s
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Forward piping3m 39s
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Array mapping and iteration6m 22s
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If-else expressions2m 9s
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Exception handling2m 40s
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Option types5m 9s
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The bot and type signatures4m 19s
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2. Build a Simple Parser with Unit Testing
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Install NUnit4m 23s
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Write a real test4m 31s
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Write a parser5m 8s
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Refactor tests5m 18s
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Test unhappy paths4m 1s
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Challenge35s
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Solution3m 38s
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3. Use F# CSV Type Provider to Get Data
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Recap and code tidy-up1m 51s
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Introducing Quandl1m 52s
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Challenge1m 14s
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Solution9m 34s
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4. Analyze Data with F# Collection Functions
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5. Use RStats Provider and ggplot2 to Plot Data
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RStats and ggplot21m 38s
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Develop the chart generator5m 45s
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Challenge38s
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Solution2m 21s
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6. Use BoxKite with Twitter
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Create a Twitter application5m 24s
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React to directed tweets4m 47s
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7. Deploy a Working Bot
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Call the reply function1m 17s
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Try the bot running locally1m 53s
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Understanding ROP2m 37s
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Conclusion
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Next steps1m 46s
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Video: Write a real test