Test exemplar value type

sdk/metric/internal/exemplar/value.go

@@ -3,9 +3,7 @@
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
-import (
-	"math"
-)
+import "math"
 
 // ValueType identifies the type of value used in exemplar data.
 type ValueType uint8
@@ -30,21 +28,13 @@ type Value struct {
 func NewValue[N int64 | float64](value N) Value {
 	switch v := any(value).(type) {
 	case int64:
-		return newInt64Value(v)
+		return Value{t: Int64ValueType, val: uint64(v)}
 	case float64:
-		return newFloat64Value(v)
+		return Value{t: Float64ValueType, val: math.Float64bits(v)}
 	}
 	return Value{}
 }
 
-func newInt64Value(val int64) Value {
-	return Value{t: Int64ValueType, val: uint64(val)}
-}
-
-func newFloat64Value(val float64) Value {
-	return Value{t: Float64ValueType, val: math.Float64bits(val)}
-}
-
 // Type returns the [ValueType] of data held by v.
 func (v Value) Type() ValueType { return v.t }
 

sdk/metric/internal/exemplar/value_test.go

@@ -0,0 +1,27 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package exemplar
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValue(t *testing.T) {
+	const iVal, fVal = int64(43), float64(0.3)
+	i, f, bad := NewValue[int64](iVal), NewValue[float64](fVal), Value{}
+
+	assert.Equal(t, Int64ValueType, i.Type())
+	assert.Equal(t, iVal, i.Int64())
+	assert.Equal(t, float64(0), i.Float64())
+
+	assert.Equal(t, Float64ValueType, f.Type())
+	assert.Equal(t, fVal, f.Float64())
+	assert.Equal(t, int64(0), f.Int64())
+
+	assert.Equal(t, UnknownValueType, bad.Type())
+	assert.Equal(t, float64(0), bad.Float64())
+	assert.Equal(t, int64(0), bad.Int64())
+}