Manifests based syntax¶

This is the simplest and less verbose supported syntax.

You provide bare Kubernetes resource manifests and Chainsaw will use those manifests to create, update, or assert expectations against a cluster.

While this syntax is simple, it doesn't support deletion operations and doesn't allow specifying additional configuration per test or step.

It also relies a lot on file naming conventions and makes it hard to reuse files across multiple tests.

File naming convention¶

Manifest files must follow the naming convention <step index>-<name|assert|errors>.yaml.

As an example 00-configmap.yaml, 01-assert.yaml and 02-errors.yaml can all be considered valid file names.

It's also perfectly valid to have multiple files for the same step. Let's imagine we have the following files 00-resources.yaml, 00-more-resources.yaml, 00-assert.yaml and 00-errors.yaml:

• 00-resources.yaml and 00-more-resources.yaml contain resources that will be applied in step 00
• 00-assert.yaml contains assert statements in step 00
• 00-errors.yaml contains error statements in step 00

With the four files above, Chainsaw will assemble a test step made of the combination of all those files.

Manifests loading process¶

The logic to determine the content of a step is always:

• The step index is obtained from the beginning of the file name, it must be composed of two numbers between 0 and 9 (from 00 to 99)
• The next character acts as a separator and is expected to be -
• The rest of the file name (without extension) is then evaluated
  • If it is equal to assert, the content is considered assertion statements
  • If it is equal to error, the content is considered error statements
  • Else the content is considered resources to be applied
• The extension must be .yaml or .yml

Example¶

01-configmap.yaml¶

The manifest below contains a config map in a file called 01-configmap.yaml. Chainsaw will associate this manifest with an apply operation in step 01.

apiVersion: v1
kind: ConfigMap
metadata:
  name: chainsaw-quick-start
data:
  foo: bar

02-assert.yaml¶

The manifest below contains an assertion statement in a file called 02-assert.yaml. Chainsaw will associate this manifest with an assert operation in step 02.

apiVersion: v1
kind: ConfigMap
metadata:
  name: chainsaw-quick-start
data:
  foo: bar

03-errors.yaml¶

The manifest below contains an error statement in a file called 03-errors.yaml. Chainsaw will associate this manifest with an error operation in step 03.

apiVersion: v1
kind: ConfigMap
metadata:
  name: chainsaw-quick-start
data:
  lorem: ipsum

Conclusion¶

This test will first create a config map, then assert the content of the config map contains the foo: bar data, and then verify that the configmap does not contain the lorem: ipsum data.

Assert and error statements are very similar to standard resource definitions, they share the same structure but can be partial. Chainsaw will process only the elements present in the statements against the actual resource definition.