Improve chai support (with detailed output, to match jest exceptions)

packages/jest-jasmine2/src/jasmine/Env.ts

@@ -663,7 +663,10 @@ export default function(j$: Jasmine) {
         let checkIsError;
         let message;
 
-        if (error instanceof AssertionError) {
+        if (
+          error instanceof AssertionError ||
+          error.name === AssertionError.name
+        ) {
           checkIsError = false;
           // @ts-ignore TODO Possible error: j$.Spec does not have expand property
           message = assertionErrorMessage(error, {expand: j$.Spec.expand});

packages/jest-jasmine2/src/jasmine/Spec.ts

@@ -236,10 +236,9 @@ export default class Spec {
         passed: false,
         expected: '',
         actual: '',
-        error:
-          error instanceof AssertionError
-            ? assertionErrorMessage(error, {expand: this.expand})
-            : error,
+        error: this.isAssertionError(error)
+          ? assertionErrorMessage(error, {expand: this.expand})
+          : error,
       },
       true,
     );
@@ -292,6 +291,12 @@ export default class Spec {
   getFullName() {
     return this.getSpecName(this);
   }
+
+  isAssertionError(error: Error) {
+    return (
+      error instanceof AssertionError || error.name === AssertionError.name
+    );
+  }
 }
 
 Spec.pendingSpecExceptionMessage = '=> marked Pending';