CRE SDK: Add std test for time interpretation (#1835)

Author: nolag

pkg/workflows/wasm/host/standard_test.go

@@ -502,6 +502,27 @@ func TestStandardSecretsFailInNodeMode(t *testing.T) {
 	require.Contains(t, errStr, "cannot use Runtime inside RunInNodeMode")
 }
 
+func TestStandardTimeInterpretation(t *testing.T) {
+	t.Parallel()
+	mockExecutionHelper := NewMockExecutionHelper(t)
+	mockExecutionHelper.EXPECT().GetWorkflowExecutionID().Return("id")
+	// Inject fixed timestamp: 1577934245000 milliseconds = 2020-01-02T03:04:05Z
+	fixedTime := time.UnixMilli(1577934245000)
+	mockExecutionHelper.EXPECT().GetDONTime().RunAndReturn(func() (time.Time, error) {
+		return fixedTime, nil
+	}).Maybe()
+	mockExecutionHelper.EXPECT().GetNodeTime().RunAndReturn(func() time.Time {
+		return time.Now()
+	}).Maybe()
+
+	m := makeTestModule(t)
+	request := triggerExecuteRequest(t, 0, &basictrigger.Outputs{CoolOutput: anyTestTriggerValue})
+	result := executeWithResult[string](t, m, request, mockExecutionHelper)
+
+	// Assert exact ISO 8601 UTC string
+	require.Equal(t, "2020-01-02T03:04:05Z", result)
+}
+
 func triggerExecuteRequest(t *testing.T, id uint64, trigger proto.Message) *sdk.ExecuteRequest {
 	wrappedTrigger, err := anypb.New(trigger)
 	require.NoError(t, err)

pkg/workflows/wasm/host/standard_tests/time_interpretation/main_wasip1.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"github.com/smartcontractkit/chainlink-common/pkg/workflows/wasm/host/internal/rawsdk"
+	"github.com/smartcontractkit/chainlink-protos/cre/go/sdk"
+)
+
+func main() {
+	rawsdk.SwitchModes(int32(sdk.Mode_MODE_DON))
+
+	t := rawsdk.Now()
+
+	isoString := t.UTC().Format("2006-01-02T15:04:05Z07:00")
+
+	rawsdk.SendResponse(isoString)
+}