PC-15140 Add at least second time resolution for firstEventStart fiel…

…d validation

manifest/v1alpha/budgetadjustment/validation.go

@@ -41,7 +41,8 @@ var specValidation = govy.New[Spec](
 		Rules(validationV1Alpha.StringDescription()),
 	govy.For(func(s Spec) time.Time { return s.FirstEventStart }).
 		WithName("firstEventStart").
-		Required(),
+		Required().
+		Rules(atLeastSecondTimeResolution),
 	govy.Transform(func(s Spec) string { return s.Duration }, time.ParseDuration).
 		WithName("duration").
 		Required().
@@ -98,3 +99,11 @@ var atLeastHourlyFreq = govy.NewRule(func(rule *rrule.RRule) error {
 
 	return nil
 })
+
+var atLeastSecondTimeResolution = govy.NewRule(func(t time.Time) error {
+	if t.Nanosecond() != 0 {
+		return errors.New("time must be defined with second resolution")
+	}
+
+	return nil
+})

manifest/v1alpha/budgetadjustment/validation_test.go

@@ -542,3 +542,43 @@ func TestAtLeastHourlyFreq(t *testing.T) {
 		})
 	}
 }
+
+func TestAtLeastSecondTimeResolution(t *testing.T) {
+	tests := []struct {
+		name          string
+		time          time.Time
+		expectedError string
+	}{
+		{
+			name:          "time with nanosecond returns error",
+			time:          time.Date(2023, time.January, 1, 0, 0, 0, 1, time.UTC),
+			expectedError: "time must be defined with second resolution",
+		},
+		{
+			name:          "time with second resolution returns no error",
+			time:          time.Date(2023, time.January, 1, 0, 0, 0, 0, time.UTC),
+			expectedError: "",
+		},
+		{
+			name:          "time with millisecond resolution returns error",
+			time:          time.Date(2023, time.January, 1, 0, 0, 0, 1000000, time.UTC),
+			expectedError: "time must be defined with second resolution",
+		},
+		{
+			name:          "time with microsecond resolution returns error",
+			time:          time.Date(2023, time.January, 1, 0, 0, 0, 526, time.UTC),
+			expectedError: "time must be defined with second resolution",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := atLeastSecondTimeResolution.Validate(tt.time)
+			if tt.expectedError == "" {
+				assert.NoError(t, err)
+			} else {
+				assert.EqualError(t, err, tt.expectedError)
+			}
+		})
+	}
+}