fix(matcher): Support undefined values.

Author: cartant

fixtures/mocha/issues-spec.ts

@@ -0,0 +1,24 @@
+/**
+ * @license Use of this source code is governed by an MIT-style license that
+ * can be found in the LICENSE file at https://github.com/cartant/rxjs-marbles
+ */
+/*tslint:disable:object-literal-sort-keys*/
+
+import { expect } from "chai";
+import { of } from "rxjs/observable/of";
+import { cases, marbles } from "../../dist/mocha";
+
+describe("issues", () => {
+
+    describe("issue-22", () => {
+
+        it("should fail with a useful error message", marbles(m => {
+            expect(() => {
+                const actual = of([undefined]);
+                m.expect(actual).toBeObservable("--|");
+                m.autoFlush = false;
+                m.flush();
+            }).to.throw(/\{"frame":0,"notification":\{"kind":"N","value":"\[\s*undefined\s*\]","hasValue":true\}\}/);
+        }));
+    });
+});

package.json

@@ -9,6 +9,7 @@
   },
   "description": "An RxJS marble testing library for any test framework",
   "devDependencies": {
+    "@types/chai": "^4.1.2",
     "@types/jasmine": "^2.5.53",
     "@types/jest": "^22.0.0",
     "@types/mocha": "^2.2.41",
@@ -18,6 +19,7 @@
     "babel-preset-es2015-rollup": "^3.0.0",
     "babel-preset-es2016": "^6.24.0",
     "babel-preset-es2017": "^6.24.0",
+    "chai": "^4.1.2",
     "cpy-cli": "^1.0.1",
     "cross-env": "^5.0.5",
     "jasmine": "^2.6.0",

source/matcher.ts

@@ -18,6 +18,9 @@
 import isEqual from "lodash-es/isEqual";
 
 function stringify(x: any): string {
+  if (x === undefined) {
+    return 'undefined';
+  }
   return JSON.stringify(x, function (key: any, value: any): any {
     if (Array.isArray(value)) {
       return '[' + value

yarn.lock

@@ -61,6 +61,10 @@
     pretty-ms "^0.2.1"
     text-table "^0.2.0"
 
+"@types/chai@^4.1.2":
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.1.2.tgz#f1af664769cfb50af805431c407425ed619daa21"
+
 "@types/jasmine@^2.5.53":
   version "2.8.6"
   resolved "https://registry.yarnpkg.com/@types/jasmine/-/jasmine-2.8.6.tgz#14445b6a1613cf4e05dd61c3c3256d0e95c0421e"
@@ -257,6 +261,10 @@ assert-plus@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-0.2.0.tgz#d74e1b87e7affc0db8aadb7021f3fe48101ab234"
 
+assertion-error@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.1.0.tgz#e60b6b0e8f301bd97e5375215bda406c85118c0b"
+
 astral-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
@@ -1074,6 +1082,17 @@ center-align@^0.1.1:
     align-text "^0.1.3"
     lazy-cache "^1.0.3"
 
+chai@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/chai/-/chai-4.1.2.tgz#0f64584ba642f0f2ace2806279f4f06ca23ad73c"
+  dependencies:
+    assertion-error "^1.0.1"
+    check-error "^1.0.1"
+    deep-eql "^3.0.0"
+    get-func-name "^2.0.0"
+    pathval "^1.0.0"
+    type-detect "^4.0.0"
+
 chalk@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-0.4.0.tgz#5199a3ddcd0c1efe23bc08c1b027b06176e0c64f"
@@ -1100,6 +1119,10 @@ chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.0:
     escape-string-regexp "^1.0.5"
     supports-color "^4.0.0"
 
+check-error@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/check-error/-/check-error-1.0.2.tgz#574d312edd88bb5dd8912e9286dd6c0aed4aac82"
+
 chokidar@^1.4.2:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-1.7.0.tgz#798e689778151c8076b4b360e5edd28cda2bb468"
@@ -1393,6 +1416,12 @@ decamelize@^1.0.0, decamelize@^1.1.1, decamelize@^1.1.2:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
+deep-eql@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-3.0.1.tgz#dfc9404400ad1c8fe023e7da1df1c147c4b444df"
+  dependencies:
+    type-detect "^4.0.0"
+
 deep-equal@^1.0.0, deep-equal@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz#f5d260292b660e084eff4cdbc9f08ad3247448b5"
@@ -1805,6 +1834,10 @@ get-caller-file@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
 
+get-func-name@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/get-func-name/-/get-func-name-2.0.0.tgz#ead774abee72e20409433a066366023dd6887a41"
+
 get-port@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/get-port/-/get-port-3.2.0.tgz#dd7ce7de187c06c8bf353796ac71e099f0980ebc"
@@ -3379,6 +3412,10 @@ path-type@^2.0.0:
   dependencies:
     pify "^2.0.0"
 
+pathval@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/pathval/-/pathval-1.1.0.tgz#b942e6d4bde653005ef6b71361def8727d0645e0"
+
 performance-now@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-0.2.0.tgz#33ef30c5c77d4ea21c5a53869d91b56d8f2555e5"
@@ -4302,6 +4339,10 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
+type-detect@^4.0.0:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
+
 typescript@~2.7.1:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.1.tgz#bb3682c2c791ac90e7c6210b26478a8da085c359"