Fix API PHP unit tests

tests/phpunit/base/frm_factory.php

@@ -142,6 +142,21 @@ public function get_fields_from_form( $form_id ) {
 	 * @return mixed
 	 */
 	public function set_field_value( $field ) {
+		if ( in_array( $field->type, array( 'checkbox', 'select', 'radio' ), true ) ) {
+			if ( ! $field->options ) {
+				return '';
+			}
+
+			// If checkbox, dropdown or radio field, return a random choice from the options.
+			$random_option = $field->options[ array_rand( $field->options ) ];
+
+			if ( FrmField::is_option_true( $field, 'separate_value' ) ) {
+				return $random_option['value'];
+			}
+
+			return $random_option;
+		}
+
 		$value        = rand_str();
 		$field_values = array(
 			'email'    => 'admin@example.org',

tests/phpunit/base/testdata.xml

@@ -791,7 +791,7 @@
             <form_id>698</form_id>
             <required></required>
             <options><![CDATA[]]></options>
-            <field_options><![CDATA[{"size":"","max":"10","label":"","blank":"This field cannot be blank.","required_indicator":"*","invalid":"Date is invalid","separate_value":0,"clear_on_focus":0,"default_blank":0,"classes":"","custom_html":"<div id=\"frm_field_[id]_container\" class=\"frm_form_field form-field [required_class][error_class]\">\n    <label for=\"field_[key]\" class=\"frm_primary_label\">[field_name]\n        <span class=\"frm_required\">[required_label]<\/span>\n    <\/label>\n    [input]\n    [if description]<div class=\"frm_description\">[description]<\/div>[\/if description]\n    [if error]<div class=\"frm_error\">[error]<\/div>[\/if error]\n<\/div>","slide":0,"form_select":"","show_hide":"show","any_all":"any","align":"block","hide_field":[],"hide_field_cond":["=="],"hide_opt":[],"star":0,"ftypes":[],"data_type":"select","restrict":0,"start_year":"2000","end_year":"2020","read_only":0,"admin_only":"","locale":"","attach":false,"minnum":0,"maxnum":9999,"step":1,"clock":12,"start_time":"00:00","end_time":"23:59","unique":0,"use_calc":0,"calc":"","calc_dec":"","dyn_default_value":"","multiple":0,"unique_msg":"","autocom":0,"format":"","repeat":0,"add_label":"Add","remove_label":"Remove","conf_field":"","conf_input":"","conf_desc":"","conf_msg":"The entered values do not match","other":0}]]></field_options>
+            <field_options><![CDATA[{"size":"","max":"10","label":"","blank":"This field cannot be blank.","required_indicator":"*","invalid":"Date is invalid","separate_value":0,"clear_on_focus":0,"default_blank":0,"classes":"","custom_html":"<div id=\"frm_field_[id]_container\" class=\"frm_form_field form-field [required_class][error_class]\">\n    <label for=\"field_[key]\" class=\"frm_primary_label\">[field_name]\n        <span class=\"frm_required\">[required_label]<\/span>\n    <\/label>\n    [input]\n    [if description]<div class=\"frm_description\">[description]<\/div>[\/if description]\n    [if error]<div class=\"frm_error\">[error]<\/div>[\/if error]\n<\/div>","slide":0,"form_select":"","show_hide":"show","any_all":"any","align":"block","hide_field":[],"hide_field_cond":["=="],"hide_opt":[],"star":0,"ftypes":[],"data_type":"select","restrict":0,"start_year":"2000","end_year":"2050","read_only":0,"admin_only":"","locale":"","attach":false,"minnum":0,"maxnum":9999,"step":1,"clock":12,"start_time":"00:00","end_time":"23:59","unique":0,"use_calc":0,"calc":"","calc_dec":"","dyn_default_value":"","multiple":0,"unique_msg":"","autocom":0,"format":"","repeat":0,"add_label":"Add","remove_label":"Remove","conf_field":"","conf_input":"","conf_desc":"","conf_msg":"The entered values do not match","other":0}]]></field_options>
 		</field>
 		<field>
 		    <id>8117</id>