GODRIVER-300 add Time(time.Time) to ValueConstructor

Change-Id: I986962c2c67510b4c68e87bf52712ee41a90dd58

Author: Isabella Siu

bson/constructor.go

@@ -634,6 +634,11 @@ func (ValueConstructor) DateTime(dt int64) *Value {
 	return EC.DateTime("", dt).value
 }
 
+// Time creates a datetime value from the argument.
+func (ValueConstructor) Time(t time.Time) *Value {
+	return EC.Time("", t).value
+}
+
 // Null creates a null value from the argument.
 func (ValueConstructor) Null() *Value {
 	return EC.Null("").value

bson/constructor_test.go

@@ -731,6 +731,26 @@ func TestConstructor(t *testing.T) {
 			requireValuesEqual(t, expected, actual)
 		})
 
+		t.Run("time", func(t *testing.T) {
+			buf := []byte{
+				// type
+				0x9,
+				// key
+				0x0,
+				// value
+				0xC9, 0x6C, 0x3C, 0xAF, 0x60, 0x1, 0x0, 0x0,
+			}
+
+			expected := &Value{start: 0, offset: 2, data: buf, d: nil}
+
+			date := time.Date(2018, 1, 1, 1, 1, 1, int(1*time.Millisecond), time.UTC)
+			actualTime := VC.Time(date)
+			actualDateTime := VC.DateTime(date.UnixNano() / 1e6)
+
+			requireValuesEqual(t, expected, actualTime)
+			requireValuesEqual(t, expected, actualDateTime)
+		})
+
 		t.Run("Null", func(t *testing.T) {
 			buf := []byte{
 				// type