init

internal/composeedit/composeedit_test.go

@@ -0,0 +1,31 @@
+package composeedit
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestPatchPreservesUnknownAndComments(t *testing.T) {
+	src := "# top\nservices:\n  app:\n    image: nginx:old # keep\n    x-future:\n      magic: true\n    deploy:\n      replicas: 2\n"
+	out, e := Apply(src, Patch{Path: []string{"services", "app", "image"}, Value: "nginx:new"})
+	if e != nil {
+		t.Fatal(e)
+	}
+	if !strings.Contains(out, "x-future:") || !strings.Contains(out, "magic: true") || !strings.Contains(out, "replicas: 2") || !strings.Contains(out, "# top") {
+		t.Fatalf("preservation failed:\n%s", out)
+	}
+	r, e := Parse(out)
+	if e != nil || r.Value == nil {
+		t.Fatalf("parse %v", e)
+	}
+}
+func TestArrayPatch(t *testing.T) {
+	src := "services:\n  app:\n    ports:\n      - 8080:80\n"
+	out, e := Apply(src, Patch{Path: []string{"services", "app", "ports", "0"}, Value: "9090:80"})
+	if e != nil {
+		t.Fatal(e)
+	}
+	if !strings.Contains(out, "9090:80") {
+		t.Fatal(out)
+	}
+}