Generate unit tests

io.moderne.diffblue.GenerateUnitTests

Use the Diffblue Cover tool to generate unit tests for Java classes.

Recipe source

This recipe is only available to users of Moderne.

This recipe is available under the Moderne Proprietary License.

Options

Type	Name	Description	Example
String	license	The content of the ~/.diffblue/license.key file to use for Diffblue Cover.	YOUR-LICENSE-KEY
Integer	iterations	Optional. The number of iterations to run when generating tests.	1000
Boolean	skipVerification	Optional. Skip verification of generated tests.	false
List	arguments	Optional. Additional arguments to pass to Diffblue Cover. See the available arguments in the Cover CLI documentation.

Usage

This recipe has required configuration parameters and can only be run by users of Moderne. To run this recipe, you will need to provide the Moderne CLI run command with the required options. Or, if you'd like to create a declarative recipe, please see the below example of a rewrite.yml file:

rewrite.yml

---
type: specs.openrewrite.org/v1beta/recipe
name: com.yourorg.GenerateUnitTestsExample
displayName: Generate unit tests example
recipeList:
  - io.moderne.diffblue.GenerateUnitTests: 
      license: YOUR-LICENSE-KEY
      iterations: 1000
      skipVerification: false

Moderne CLI

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell

mod run . --recipe GenerateUnitTests --recipe-option "license=YOUR-LICENSE-KEY" --recipe-option "iterations=1000" --recipe-option "skipVerification=false"

If the recipe is not available locally, then you can install it using:

mod config recipes jar install org.openrewrite.recipe:rewrite-diffblue:{{VERSION_ORG_OPENREWRITE_RECIPE_REWRITE_DIFFBLUE}}

See how this recipe works across multiple open-source repositories

Run this recipe on OSS repos at scale with the Moderne SaaS.

Run this recipe here

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Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.

Data Tables

DiffblueErrors

Diffblue errors

io.moderne.diffblue.table.DiffblueErrors

The errors generated by Diffblue Cover during its attempt to generate unit tests.

Column Name	Description
Error code	The error code returned by Diffblue Cover.
Error text	The error text returned by Diffblue Cover.

SourcesFileResults

Source files that had results

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column Name	Description
Source path before the run	The source path of the file before the run. null when a source file was created during the run.
Source path after the run	A recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changes	In a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changes	The specific recipe that made a change.
Estimated time saving	An estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
Cycle	The recipe cycle in which the change was made.

SourcesFileErrors

Source files that errored on a recipe

org.openrewrite.table.SourcesFileErrors

The details of all errors produced by a recipe run.

Column Name	Description
Source path	The file that failed to parse.
Recipe that made changes	The specific recipe that made a change.
Stack trace	The stack trace of the failure.

RecipeRunStats

Recipe performance

org.openrewrite.table.RecipeRunStats

Statistics used in analyzing the performance of recipes.

Column Name	Description
The recipe	The recipe whose stats are being measured both individually and cumulatively.
Source file count	The number of source files the recipe ran over.
Source file changed count	The number of source files which were changed in the recipe run. Includes files created, deleted, and edited.
Cumulative scanning time (ns)	The total time spent across the scanning phase of this recipe.
99th percentile scanning time (ns)	99 out of 100 scans completed in this amount of time.
Max scanning time (ns)	The max time scanning any one source file.
Cumulative edit time (ns)	The total time spent across the editing phase of this recipe.
99th percentile edit time (ns)	99 out of 100 edits completed in this amount of time.
Max edit time (ns)	The max time editing any one source file.