Fixes time_now failing (#5928)

* fixes time_now

Signed-off-by: Vishal Choudhary <contactvishaltech@gmail.com>

* testing

Signed-off-by: Vishal Choudhary <contactvishaltech@gmail.com>

* simplified

Signed-off-by: Vishal Choudhary <contactvishaltech@gmail.com>

Signed-off-by: Vishal Choudhary <contactvishaltech@gmail.com>

pkg/engine/jmespath/functions.go

@@ -380,10 +380,7 @@ func GetFunctions() []*FunctionEntry {
 		},
 		{
 			Entry: &gojmespath.FunctionEntry{
-				Name: timeNow,
-				Arguments: []ArgSpec{
-					{Types: []JpType{JpString}},
-				},
+				Name:    timeNow,
 				Handler: jpTimeNow,
 			},
 			ReturnType: []JpType{JpString},
@@ -877,26 +874,9 @@ func jpTimeSince(arguments []interface{}) (interface{}, error) {
 }
 
 func jpTimeNow(arguments []interface{}) (interface{}, error) {
-	var err error
-	layout, err := validateArg("", arguments, 0, reflect.String)
-	if err != nil {
-		return nil, err
-	}
-
-	var t time.Time
-
-	t = time.Now()
-	if layout.String() != "" {
-		t, err = time.Parse(layout.String(), t.String())
-	} else {
-		t, err = time.Parse(time.RFC3339, t.String())
-	}
-
-	if err != nil {
-		return nil, err
-	}
-
-	return t.String(), nil
+	var ts time.Time = time.Now()
+	var t string = ts.Format(time.RFC3339)
+	return t, nil
 }
 
 func jpPathCanonicalize(arguments []interface{}) (interface{}, error) {

pkg/engine/jmespath/functions_test.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"runtime"
 	"testing"
+	"time"
 
 	"gotest.tools/assert"
 )
@@ -1639,3 +1640,28 @@ func Test_TimeParse(t *testing.T) {
 		})
 	}
 }
+
+func Test_TimeNow(t *testing.T) {
+	testCases := []struct {
+		test   string
+		layout string
+	}{
+		{
+			test: "time_now()",
+		},
+	}
+	for i, tc := range testCases {
+		t.Run(fmt.Sprintf("case %d", i), func(t *testing.T) {
+			query, err := New(tc.test)
+			assert.NilError(t, err)
+
+			res, err := query.Search("")
+			assert.NilError(t, err)
+
+			result, ok := res.(string)
+			assert.Assert(t, ok)
+
+			assert.Equal(t, result, time.Now().Format(time.RFC3339))
+		})
+	}
+}