event: add Equal methods for Label and Value
Useful for testing.
Change-Id: I77b8109b5df387273170786208af80da62ab64c2
Reviewed-on: https://go-review.googlesource.com/c/exp/+/315529
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
diff --git a/event/label.go b/event/label.go
index 8011a2f..a6819da 100644
--- a/event/label.go
+++ b/event/label.go
@@ -25,6 +25,11 @@
Value Value
}
+// Equal reports whether two labels are equal.
+func (l1 Label) Equal(l2 Label) bool {
+ return l1.Name == l2.Name && l1.Value.Equal(l2.Value)
+}
+
// stringptr is used in untyped when the Value is a string
type stringptr unsafe.Pointer
@@ -53,6 +58,30 @@
// HasValue returns true if the value is set to any type.
func (v *Value) HasValue() bool { return v.untyped != nil }
+// Equal reports whether two values are equal.
+func (v1 *Value) Equal(v2 Value) bool {
+ if !v1.HasValue() {
+ return !v2.HasValue()
+ }
+ if !v2.HasValue() {
+ return false
+ }
+ switch {
+ case v1.IsString():
+ return v2.IsString() && v1.String() == v2.String()
+ case v1.IsInt64():
+ return v2.IsInt64() && v1.packed == v2.packed
+ case v1.IsUint64():
+ return v2.IsUint64() && v1.packed == v2.packed
+ case v1.IsFloat64():
+ return v2.IsFloat64() && v1.Float64() == v2.Float64()
+ case v1.IsBool():
+ return v2.IsBool() && v1.packed == v2.packed
+ default:
+ return v1.untyped == v2.untyped
+ }
+}
+
// ValueOf returns a Value for the supplied value.
func ValueOf(value interface{}) Value {
return Value{untyped: value}
diff --git a/event/label_test.go b/event/label_test.go
index 3a5c549..6617f61 100644
--- a/event/label_test.go
+++ b/event/label_test.go
@@ -46,6 +46,32 @@
}
}
+func TestEqual(t *testing.T) {
+ var x, y int
+ vals := []event.Value{
+ {},
+ event.Int64Of(1),
+ event.Int64Of(2),
+ event.Uint64Of(3),
+ event.Uint64Of(4),
+ event.Float64Of(3.5),
+ event.Float64Of(3.7),
+ event.BoolOf(true),
+ event.BoolOf(false),
+ event.ValueOf(&x),
+ event.ValueOf(&y),
+ }
+ for i, v1 := range vals {
+ for j, v2 := range vals {
+ got := v1.Equal(v2)
+ want := i == j
+ if got != want {
+ t.Errorf("%v.Equal(%v): got %t, want %t", v1, v2, got, want)
+ }
+ }
+ }
+}
+
func panics(f func()) (b bool) {
defer func() {
if x := recover(); x != nil {
