JarCastingmunit-snapshot
Snapshot testing for MUnit. This project is a basic implementation of the snapshot tests.
Getting started
After adding the munit-snapshot dependency:
libraryDependencies += "com.github.lolgab" %% "munit-snapshot" % "0.0.4" % Test
You can create a basic test in a file called ExampleSnapshotTest.scala:
package example
import munit.snapshot._
import upickle.default._
class ExampleSnapshotTest extends SnapshotSuite {
snapshotTest("one plus one") {
1 + 1
}
}
Running the tests the first time will generate a file called ExampleSnapshotTest.json with the following content:
{
"one plus one": 2
}
where "one plus one" is the test name (it should be unique in the file) and 2 is the result of the test evaluation.
The subsequent runs will evaluate the expression again, and fail when they do not match the saved json file.
If a test is removed, running the tests will remove the key from the json file.
Here you can see what happens if I change the json file to:
{
"one plus one": 3
}
Running the test again will output:
6:class ExampleSnapshotTest extends SnapshotSuite {
7: snapshotTest("one plus one") {
8: 1 + 1
values are not the same
=> Obtained
2
=> Diff (- obtained, + expected)
-2
+3