Support static tests (#141)

* Support static tests

* Update CHANGELOG

test/packages/good/data_stream/skipped_tests/_dev/test/static/test-default-config.yml

@@ -0,0 +1,3 @@
+skip:
+  reason: Test was skipped to test skipped test feature in spec.
+  link: https://github.com/elastic/integrations/issues/0

versions/1/changelog.yml

@@ -79,4 +79,6 @@
   - description: Deprecate JSON-formatted pipeline test configs in favor of YAML-formatted ones
     type: enhancement
     link: https://github.com/elastic/package-spec/pull/139
-
+  - description: Support static tests
+    type: enhancement
+    link: https://github.com/elastic/package-spec/pull/141

versions/1/data_stream/_dev/test/spec.yml

@@ -6,6 +6,11 @@ spec:
       name: pipeline
       required: false
       $ref: "./pipeline/spec.yml"
+    - description: Folder containing tests of static resources
+      type: folder
+      name: static
+      required: false
+      $ref: "./static/spec.yml"
     - description: Folder containing system tests
       type: folder
       name: system

versions/1/data_stream/_dev/test/static/config.spec.yml

@@ -0,0 +1,10 @@
+##
+## Describes the specification for a system test configuration file
+##
+spec:
+  # Everything under here follows JSON schema (https://json-schema.org/), written as YAML for readability
+  type: object
+  additionalProperties: true
+  properties:
+    skip:
+      $ref: "./../skip.spec.yml#/definitions/skip"

versions/1/data_stream/_dev/test/static/spec.yml

@@ -0,0 +1,10 @@
+spec:
+  additionalContents: false
+  contents:
+    - description: Configuration of test case in yaml format.
+      type: file
+      pattern: '^test-[a-z0-9_.-]+-config.yml$'
+      contentMediaType: "application/x-yaml"
+      required: false
+      $ref: "./config.spec.yml"
+