add a unit test for rounding numbers in matrix entry pre-filled cells

see #1133

Author: christianp

tests/numbas-runtime.js

@@ -32886,6 +32886,13 @@ MatrixEntryPart.prototype = /** @lends Numbas.parts.MatrixEntryPart.prototype */
             ['minColumns','maxColumns','minRows','maxRows'].map(eval_setting);
         }
 
+        settings.tolerance = Math.max(settings.tolerance,0.00000000001);
+        if(settings.precisionType != 'none') {
+            settings.allowFractions = false;
+        }
+
+        this.getCorrectAnswer(scope);
+
         var prefilled_fractions = settings.allowFractions && settings.correctAnswerFractions;
         if(settings.prefilledCellsString) {
             var prefilledCells = jme.castToType(scope.evaluate(jme.subvars(settings.prefilledCellsString+'',scope)), 'list');
@@ -32916,7 +32923,7 @@ MatrixEntryPart.prototype = /** @lends Numbas.parts.MatrixEntryPart.prototype */
                                 return frac.toString();
                             } else {
                                 cell = jme.castToType(cell,'number');
-                                return math.niceRealNumber(cell.value,scope);
+                                return math.niceRealNumber(cell.value, {precisionType: settings.precisionType, precision: settings.precision, style: settings.correctAnswerStyle});
                             }
                         }
                         p.error('part.matrix.invalid type in prefilled',{type: cell.type});
@@ -32925,10 +32932,6 @@ MatrixEntryPart.prototype = /** @lends Numbas.parts.MatrixEntryPart.prototype */
             }
         }
 
-        settings.tolerance = Math.max(settings.tolerance,0.00000000001);
-        if(settings.precisionType!='none') {
-            settings.allowFractions = false;
-        }
         this.studentAnswer = [];
         for(var i=0;i<this.settings.numRows;i++) {
             var row = [];
@@ -32937,7 +32940,6 @@ MatrixEntryPart.prototype = /** @lends Numbas.parts.MatrixEntryPart.prototype */
             }
             this.studentAnswer.push(row);
         }
-        this.getCorrectAnswer(scope);
         if(!settings.allowResize && (settings.correctAnswer.rows!=settings.numRows || settings.correctAnswer.columns != settings.numColumns)) {
             var correctSize = settings.correctAnswer.rows+'×'+settings.correctAnswer.columns;
             var answerSize = settings.numRows+'×'+settings.numColumns;

tests/parts/part-tests.mjs

@@ -572,6 +572,10 @@ Numbas.queueScript('part_tests',['qunit','json','jme','localisation','parts/numb
         assert.ok(contains_note(res,{note:jme.normaliseName('all_same_precision'),message: R('part.matrix.not all cells same precision')}),'not all cells same precision warning');
     });
 
+    QUnit.test('Pre-filled cells', async function(assert) {
+        var p = createPartFromJSON({type:'matrix',correctAnswer:'matrix([1.222,1.227],[3,4])', prefilledCells: '[[1+2/9,1.227], ["3", "???"]]', precisionType: 'dp', precision: 2});
+        assert.deepEqual(p.settings.prefilledCells, [['1.22', '1.23'], ['3', '???']], 'numbers are rounded using the precision restriction; any string is valid for a pre-filled cell');
+    });
 
     question_test(
         'Note name used both for question variable and marking note',