Top down evaluation custom promise type test

Signed-off-by: Victor Moene <victor.moene@northern.tech>

Author: victormlg

tests/acceptance/30_custom_promise_types/25_top_down_evaluation_custom_promise_types.cf

@@ -0,0 +1,52 @@
+body common control
+{
+  inputs => { "../default.cf.sub" };
+  bundlesequence => { "test", "cleanup" };
+  evaluation_order => "top_down";
+}
+
+promise agent dummy
+{
+  path => "$(this.promise_dirname)/dummy_promise_type.py";
+  interpreter => "/usr/bin/python3";
+}
+
+bundle agent test
+{
+
+  dummy:
+    "/tmp/dummyfile"
+      smth => "hello";
+
+  vars:
+    "content"
+      string => readfile("/tmp/dummyfile");
+
+  files:
+    "/tmp/dummyfile"
+      content => "ok";
+
+  vars:
+    "content"
+      string => readfile("/tmp/dummyfile");
+
+  classes:
+    "ok"
+      expression => strcmp("$(content)", "ok");
+
+  reports:
+    ok::
+      "$(this.promise_filename) Pass";
+    !ok::
+      "$(this.promise_filename) FAIL";
+
+    DEBUG::
+      "$(content)";
+}
+
+bundle agent cleanup
+{
+  files:
+    "/tmp/dummyfile"
+      delete => tidy;
+}

tests/acceptance/30_custom_promise_types/dummy_promise_type.py

@@ -0,0 +1,26 @@
+from cfengine import (
+    PromiseModule,
+    Result,
+)
+
+
+class DummyPromiseType(PromiseModule):
+
+    def __init__(self, **kwargs):
+        super(DummyPromiseType, self).__init__(
+            name="dummy_promise_module", version="0.0.0", **kwargs
+        )
+
+    def validate_promise(self, promiser, attributes, meta):
+        pass
+
+    def evaluate_promise(self, promiser, attributes, metadata):
+
+        with open(promiser, "a") as f:
+            f.write("test")
+
+        return Result.KEPT
+
+
+if __name__ == "__main__":
+    DummyPromiseType().start()