can skip test ops

Author: cppforlife

patch/diff.go

@@ -9,12 +9,24 @@ import (
 )
 
 type Diff struct {
-	Left  interface{}
-	Right interface{}
+	Left      interface{}
+	Right     interface{}
+	Unchecked bool
 }
 
 func (d Diff) Calculate() Ops {
-	return d.calculate(d.Left, d.Right, []Token{RootToken{}})
+	ops := d.calculate(d.Left, d.Right, []Token{RootToken{}})
+	if !d.Unchecked {
+		return ops
+	}
+
+	newOps := []Op{}
+	for _, op := range ops {
+		if _, ok := op.(TestOp); !ok {
+			newOps = append(newOps, op)
+		}
+	}
+	return newOps
 }
 
 func (d Diff) calculate(left, right interface{}, tokens []Token) []Op {

patch/diff_test.go

@@ -38,11 +38,21 @@ var _ = Describe("Diff.Calculate", func() {
 		)
 	})
 
-	It("can replace doc root", func() {
-		testDiff(nil, "a", []Op{
-			TestOp{Path: MustNewPointerFromString(""), Value: nil},
+	It("can skip test operations", func() {
+		expectedOps := []Op{
 			ReplaceOp{Path: MustNewPointerFromString(""), Value: "a"},
-		})
+		}
+
+		var left interface{}
+		right := "a"
+
+		diffOps := Diff{Left: left, Right: right, Unchecked: true}.Calculate()
+		Expect(diffOps).To(Equal(Ops(expectedOps)))
+
+		result, err := Ops(diffOps).Apply(left)
+		Expect(err).ToNot(HaveOccurred())
+
+		Expect(result).To(Equal(right))
 	})
 
 	It("can replace doc root with nil", func() {
@@ -52,6 +62,13 @@ var _ = Describe("Diff.Calculate", func() {
 		})
 	})
 
+	It("can replace doc root", func() {
+		testDiff(nil, "a", []Op{
+			TestOp{Path: MustNewPointerFromString(""), Value: nil},
+			ReplaceOp{Path: MustNewPointerFromString(""), Value: "a"},
+		})
+	})
+
 	It("can diff maps", func() {
 		testDiff(
 			map[interface{}]interface{}{"a": 123},