Verify.Sample/runsheet.md

Assumed knowledge

• unit testing
• asserts

At any time ask questions

Snapshot Flow

First run

No existing .verified. file.

graph LR
run(Run test and<br/>create Received file)
failTest(Fail Test<br/>and show Diff)
closeDiff(Close Diff)
run-->failTest
shouldAccept{Accept ?}
failTest-->shouldAccept
accept(Move Received<br/>to Verified)
shouldAccept-- Yes -->accept
discard(Discard<br/>Received)
shouldAccept-- No -->discard
accept-->closeDiff
discard-->closeDiff

Subsequent run

Existing .verified. file.

graph LR
run(Run test and<br/>create Received file)
closeDiff(Close Diff)
failTest(Fail Test<br/>and show Diff)
run-->isSame
shouldAccept{Accept ?}
failTest-->shouldAccept
accept(Move Received<br/>to Verified)
shouldAccept-- Yes -->accept
discard(Discard<br/>Received)
shouldAccept-- No -->discard

isSame{Compare<br/>Verified +<br/>Received}
passTest(Pass Test and<br/>discard Received)
isSame-- Same --> passTest
isSame-- Different --> failTest
accept-->closeDiff
discard-->closeDiff

Snapshot management

• Choose a DiffTool.

• DiffEngineTray (Windows only), or Rider/R# extension, or via Clipboard

• Demo WinFormsAppTests from scratch

• Nested files in IDE

• Add *.received.* to .gitignore

Snapshot is Serialization

Snapshot testing leverages serialization. Converting a UI to an image is a form of serialization. The same serialization approach can be applied to any data.

• Demo: Convert PersonBuilderTests.cs to snapshot testing
• Scrubbers:
• Demo: Sql Schema.

Global Scrubbers

• Demo Blazor

Converters

Above samples WinForms and Sql were implemented as converters, but only output one file.

Converters can output multiple files. See BrowserTest.cs

Parameterized Testing

• file naming
• Demo: ParamTests

Recording

• Demo Sql recording
• Demo Http recording

Comparers

• WinForms
• Xaml
• Web

Demo: