bump gotest.tools v2.3.0, google/go-cmp v0.2.0

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/google/go-cmp/cmp/path.go

@@ -79,6 +79,11 @@ type (
 		PathStep
 		Name() string
 		Func() reflect.Value
+
+		// Option returns the originally constructed Transformer option.
+		// The == operator can be used to detect the exact option used.
+		Option() Option
+
 		isTransform()
 	}
 )
@@ -94,10 +99,21 @@ func (pa *Path) pop() {
 // Last returns the last PathStep in the Path.
 // If the path is empty, this returns a non-nil PathStep that reports a nil Type.
 func (pa Path) Last() PathStep {
-	if len(pa) > 0 {
-		return pa[len(pa)-1]
+	return pa.Index(-1)
+}
+
+// Index returns the ith step in the Path and supports negative indexing.
+// A negative index starts counting from the tail of the Path such that -1
+// refers to the last step, -2 refers to the second-to-last step, and so on.
+// If index is invalid, this returns a non-nil PathStep that reports a nil Type.
+func (pa Path) Index(i int) PathStep {
+	if i < 0 {
+		i = len(pa) + i
 	}
-	return pathStep{}
+	if i < 0 || i >= len(pa) {
+		return pathStep{}
+	}
+	return pa[i]
 }
 
 // String returns the simplified path to a node.
@@ -150,13 +166,12 @@ func (pa Path) GoString() string {
 			ssPost = append(ssPost, ")")
 			continue
 		case *typeAssertion:
-			// Elide type assertions immediately following a transform to
-			// prevent overly verbose path printouts.
-			// Some transforms return interface{} because of Go's lack of
-			// generics, but typically take in and return the exact same
-			// concrete type. Other times, the transform creates an anonymous
-			// struct, which will be very verbose to print.
-			if _, ok := nextStep.(*transform); ok {
+			// As a special-case, elide type assertions on anonymous types
+			// since they are typically generated dynamically and can be very
+			// verbose. For example, some transforms return interface{} because
+			// of Go's lack of generics, but typically take in and return the
+			// exact same concrete type.
+			if s.Type().PkgPath() == "" {
 				continue
 			}
 		}
@@ -250,6 +265,7 @@ func (sf structField) Name() string         { return sf.name }
 func (sf structField) Index() int           { return sf.idx }
 func (tf transform) Name() string           { return tf.trans.name }
 func (tf transform) Func() reflect.Value    { return tf.trans.fnc }
+func (tf transform) Option() Option         { return tf.trans }
 
 func (pathStep) isPathStep()           {}
 func (sliceIndex) isSliceIndex()       {}