Fix: min/max on dates

backends/javascript/ergo-runtime.js

@@ -582,18 +582,20 @@ const minDateTime = moment("0001-01-01 00:00:00");
 const maxDateTime = moment("3268-01-21 23:59:59");
 
 function dateTimeMax(v) {
-    if (v.length === 0) {
+    var v1 = mustBeDateArray(v);
+    if (v1.length === 0) {
         return minDateTime;
     } else {
-        return moment.max(v);
+        return moment.max(v1);
     }
 }
 
 function dateTimeMin(v) {
-    if (v.length === 0) {
+    var v1 = mustBeDateArray(v);
+    if (v1.length === 0) {
         return maxDateTime;
     } else {
-        return moment.min(v);
+        return moment.min(v1);
     }
 }
 
@@ -698,6 +700,14 @@ function mustBeDate(date) {
     }
 }
 
+function mustBeDateArray(dateArray) {
+    var newDateArray = [];
+    for (var i=0; i<dateArray.length; i++) {
+        newDateArray.push(mustBeDate(dateArray[i]));
+    }
+    return newDateArray;
+}
+
 function mustBeDuration(d) {
     if (typeof d == "string") {
         return moment.duration(d);

examples/smoke/duration1.ergo

@@ -6,16 +6,21 @@ define concept A{ a : Integer }
 define concept C{ contract : String }
 define concept R{ output1: DateTime, output2: DateTime, output3: Duration, test: Boolean }
 
+define transaction MyRequest {
+}
+define concept TemplateModel {
+}
+
 contract Duration over TemplateModel {
   clause test(request : MyRequest) : R {
-		let d1 = parse("2018-01-30");
-		let d2 = parse("17 May 2018 13:53:33 EST");
+		let d1 = dateTime("2018-01-30");
+		let d2 = dateTime("17 May 2018 13:53:33 EST");
     return R{
       output1: d1,
       output2: d2,
-			output3: diffWithUnit(d1, d2, "weeks"),
-			test: isSame(add(parse("2018-01-02"), Duration{amount:1, unit: "days"}),
-   				         add(parse("2018-01-01"), Duration{amount:2, unit: "days"}))
+			output3: diffDurationAs(d1, d2, "weeks"),
+			test: isSame(addDuration(dateTime("2018-01-02"), Duration{amount:1, unit: "days"}),
+   				         addDuration(dateTime("2018-01-01"), Duration{amount:2, unit: "days"}))
     }
   }
 }