chore: add output path mapping e2e test

e2e/kpt-krm-fn-tests.bats

@@ -78,6 +78,18 @@ teardown() {
 	grep -q cainjector ./output-remote.yaml
 }
 
+@test "kpt imperative fn should map output" {
+	cd example/kpt/output-mapping
+	rm -f output-default.yaml output-filtered.yaml
+	make fn
+
+	[ -f ./output-default.yaml ]
+	[ -f ./output-filtered.yaml ]
+	grep -q cainjector ./output-default.yaml
+	grep -Eq '^kind: ConfigMap$' ./output-filtered.yaml
+	! grep -Eq '^kind: ConfigMap$' ./output-default.yaml
+}
+
 @test "kpt declarative fn should render built-in chart" {
 	cd example/kpt/declarative
 	rm -rf generated

example/kpt/output-mapping/Makefile

@@ -0,0 +1,4 @@
+IMAGE ?= mgoltzsche/khelm:latest
+
+fn:
+	kpt fn eval --network --image="$(IMAGE)" --fn-config=./fn-config.yaml . --truncate-output=false

example/kpt/output-mapping/fn-config.yaml

@@ -0,0 +1,17 @@
+apiVersion: khelm.mgoltzsche.github.com/v2
+kind: ChartRenderer
+metadata:
+  name: remote-chart
+  annotations:
+    config.kubernetes.io/local-config: "true"
+repository: https://charts.jetstack.io
+chart: cert-manager
+version: 1.10.2
+name: myrelease
+debug: true
+outputPath: output-default.yaml
+outputPathMapping:
+- outputPath: output-filtered.yaml
+  selectors:
+  - kind: ConfigMap
+    name: myrelease-cert-manager-webhook