progtest: Display reader errors in browser

progtest/bin/runner.js

@@ -32,4 +32,8 @@ const runner = require( '../src/env' ).console(
     program, process.stdout
 );
 
-runner( case_yaml );
+// XXX: work around issue with consts not being initialized ahead of time
+program.rater( {} );
+
+runner( case_yaml )
+    .catch( e => console.error( e ) );

progtest/src/TestRunner.js

@@ -97,7 +97,7 @@ module.exports = Class( 'TestRunner',
     {
         const total = dfns.length;
 
-        return new Promise( resolve =>
+        return new Promise( ( resolve, reject ) =>
         {
             const results = [];
 

progtest/src/env.js

@@ -52,8 +52,18 @@ module.exports = {
             .use( ConstResolver( program ) )
             ( yaml_reader, TestCase );
 
-        return yaml => runner.runTests(
-            reader.loadCases( yaml )
-        );
+        return yaml => new Promise( ( resolve, reject ) =>
+        {
+            try
+            {
+                const cases = reader.loadCases( yaml );
+
+                resolve( runner.runTests( cases ) );
+            }
+            catch ( e )
+            {
+                reject( e );
+            }
+        } );
     },
 };

src/current/scripts/entry-form.js

@@ -1591,7 +1591,8 @@ var client = ( function()
             {
                 const yaml = ev.target.result;
 
-                runner( yaml );
+                runner( yaml )
+                    .catch( e => alert( e.message ) );
 
                 // run for remaining files
                 runYamlTestCases( files, runner );