add test for compatibiity

Signed-off-by: Jose I. Paris <jiparis@chainloop.dev>

Author: jiparis

pkg/policies/engine/rego/boilerplate_test.go

@@ -71,6 +71,11 @@ func TestInjectBoilerplate(t *testing.T) {
 			inputFile:  "testfiles/boilerplate/source-commit-simplified.rego",
 			outputName: "source-commit-simplified-output.rego",
 		},
+		{
+			name:       "backwards compatibility, policy keeps untouched",
+			inputFile:  "testfiles/result_format.rego",
+			outputName: "result_format-output.rego",
+		},
 	}
 
 	for _, tc := range testCases {

pkg/policies/engine/rego/testfiles/boilerplate/output/result_format-output.rego

@@ -0,0 +1,37 @@
+package main
+
+import rego.v1
+
+result := {
+	"skipped": skipped,
+	"violations": violations,
+	"skip_reason": skip_reason,
+	"ignore": ignore,
+}
+
+default skip_reason := ""
+
+skip_reason := m if {
+	not valid_input
+	m := "invalid input"
+}
+
+default skipped := true
+
+default ignore := false
+
+skipped := false if valid_input
+
+ignore := true if {
+    input.specVersion == "1.0"
+}
+
+violations contains msg if {
+	valid_input
+	input.specVersion != "1.5"
+	msg := sprintf("wrong CycloneDX version. Expected 1.5, but it was %s", [input.specVersion])
+}
+
+valid_input if {
+	input.specVersion
+}