From f93685308adf78c0e43736483945d489d33545e5 Mon Sep 17 00:00:00 2001
From: yu-lia <adaskina@gmail.com>
Date: Mon, 5 Dec 2022 11:49:08 +0000
Subject: [PATCH] Add content for marble diagram (#3028)

* Update 102-marble-diagrams.md

* Update content/roadmaps/104-angular/content/101-rxjs-basics/102-marble-diagrams.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>
---
 .../content/101-rxjs-basics/102-marble-diagrams.md       | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/content/roadmaps/104-angular/content/101-rxjs-basics/102-marble-diagrams.md b/content/roadmaps/104-angular/content/101-rxjs-basics/102-marble-diagrams.md
index 34e624ddc..5b8ece304 100644
--- a/content/roadmaps/104-angular/content/101-rxjs-basics/102-marble-diagrams.md
+++ b/content/roadmaps/104-angular/content/101-rxjs-basics/102-marble-diagrams.md
@@ -1 +1,8 @@
-# Marble diagrams
\ No newline at end of file
+# Marble Diagrams
+
+Marble testing allows you to test asynchronous RxJS code synchronously and step-by-step with the help of RxJS TestScheduler test utility and using virtual time steps.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.altamira.ai/blog/angular-marble-testing-a-brief-introduction/'>Angular Marble Testing: A Brief Introduction</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://medium.com/@jshvarts/read-marble-diagrams-like-a-pro-3d72934d3ef5'>IUnderstanding Marble Diagrams for Reactive Streams</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://rxmarbles.com/#from'>Interactive Diagrams</BadgeLink>