Added first test cases for init

.github/workflows/Build-test-spec.yml

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+name: Build TREE discovery spec
+on:
+  workflow_dispatch: {}
+  pull_request: {}
+  push:
+    branches: [master]
+jobs:
+  main:
+    name: Build, Validate and Deploy
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v3
+      - uses: w3c/spec-prod@v2
+        with:
+          TOOLCHAIN: bikeshed
+
+          # Modify as appropriate
+          GH_PAGES_BRANCH: gh-pages
+
+          # if your doc isn’t in the root folder,
+          # or Bikeshed otherwise can’t find it:
+          SOURCE: 04-tests.bs
+
+          # output filename defaults to your input
+          # with .html extension instead,
+          # but if you want to customize it:
+          DESTINATION: tests.html

04-tests.bs

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+<pre class='metadata'>
+Title: TREE client tests
+Shortname: tests
+Level: 1
+Status: w3c/CG-DRAFT
+Markup Shorthands: markdown yes
+URL: https://w3id.org/tree/specification/tests
+Repository: https://github.com/treecg/specification
+Mailing List: public-treecg@w3.org
+Mailing List Archives: https://lists.w3.org/Archives/Public/public-treecg/
+Editor: Pieter Colpaert, https://pietercolpaert.be
+Abstract:
+	A set of tests for testing compliance of clients to the TREE specification.
+</pre>
+
+# Tests # {#overview}
+
+## 01. Initialization ## {#01}
+
+This test is about a function `initialization(url)`. The function will return a the collection and the URL of the root node.
+
+We’ll test this with various URLs containing different contents.
+
+### 01.1 The URL to a rootnode without redirects ### {#01.1}
+
+File url `test01.1.ttl`
+
+```turtle
+@prefix tree: <https://w3id.org/tree#> .
+<Collection> tree:view <test01.1.ttl> .
+```
+
+Returns:
+ * Collection: <Collection>
+ * Root node: <test01.1.ttl>
+
+### 01.2 The URL to a collection without redirects ### {#01.2}
+
+File url `test01.2.ttl#collection`
+
+```turtle
+@prefix tree: <https://w3id.org/tree#> .
+<test01.2.ttl#collection> tree:view <test01.2.ttl> .
+```
+
+Returns:
+ * Collection: <test01.2.ttl#collection>
+ * Root node: <test01.2.ttl>
+
+### 01.3 The URL to a rootnode before redirects ### {#01.1}
+
+File url `test01.3` should redirect to `test01.3.ttl`
+
+```turtle
+@prefix tree: <https://w3id.org/tree#> .
+<Collection> tree:view <test01.3.ttl> .
+```
+
+Returns:
+ * Collection: <Collection>
+ * Root node: <test01.3.ttl>