Improved error messages

Author: jared

testsuites/lbt-prelude/lbt-prelude-typescript/src/Json-test.ts

@@ -51,20 +51,26 @@ export async function fromToGoldenTest<A>(
   for (const [filepath, index] of foundGoldens) {
     const contents = await Fs.readFile(filepath, { encoding: "utf8" });
 
-    const fromToJson = PreludeJson.stringify(
-      jsonDict.toJson(
-        jsonDict.fromJson(
-          PreludeJson.parseJson(contents),
+    try {
+      const fromToJson = PreludeJson.stringify(
+        jsonDict.toJson(
+          jsonDict.fromJson(
+            PreludeJson.parseJson(contents),
+          ),
         ),
-      ),
-    );
+      );
 
-    // TODO(jaredponn). This fails on the _first_ test instead of
-    // accumulating all of them.. Perhaps we want to accumulate all of
-    // them by e.g. wrapping this with `it`.
-    if (contents !== fromToJson) {
+      // TODO(jaredponn). This fails on the _first_ test instead of
+      // accumulating all of them.. Perhaps we want to accumulate all of
+      // them by e.g. wrapping this with `it`.
+      if (contents !== fromToJson) {
+        assert.fail(
+          `Golden test failed for ${index}. Expected:\n\`${contents}\`\nbut got\n\`${fromToJson}\``,
+        );
+      }
+    } catch (err) {
       assert.fail(
-        `Golden test failed for ${index}. Expected:\n\`${contents}\`\nbut got\n\`${fromToJson}\``,
+        `Golden test failed for ${index} since an error was thrown: \`${err}\`.`,
       );
     }
   }