ui: [BUGFIX] De-duplicate Tag rendering

.changelog/10186.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+ui: De-duplicate tags in rendered tag listings
+```

ui/packages/consul-ui/app/components/tag-list/README.mdx

@@ -0,0 +1,75 @@
+# TagList
+
+Template only component for rendering a list of tags. You can pass either/or/and `@tags=tags` and/or `@item=item` (`item` must have a `Tags` property) for ease. If you pass both they are merged and de-duped.
+
+Tags are de-duplicated when rendered.
+
+```hbs preview-template
+<TagList
+  @item={{hash
+    Tags=(array 'tag' 'tag' 'another-tag')
+  }}
+/>
+
+<hr />
+
+<TagList
+  @tags={{array 'another-tag' 'tag' 'tag'}}
+/>
+```
+
+`TagList` is also a recursive component, which can currently be used for when you need to wrap the `TagList` component in more DOM, but you only want that DOM to appear if your array of tags is non-empty.
+
+
+```hbs preview-template
+<figure>
+  <figcaption>
+    This list has tags therefore the red border div will also be rendered.
+  </figcaption>
+
+  <TagList
+    @item={{hash
+      Tags=(array 'tag' 'tag' 'another-tag')
+    }}
+  as |Tags|>
+    <div style="border: 1px solid red;">
+      <Tags />
+    </div>
+  </TagList>
+
+</figure>
+
+<hr />
+
+<figure>
+  <figcaption>
+    This list has no tags therefore the tags _and_ red border div will **not** be rendered.
+  </figcaption>
+
+  <TagList
+    @item={{hash
+      Tags=(array)
+    }}
+  as |Tags|>
+    <div style="border: 1px solid red;">
+      <Tags />
+    </div>
+  </TagList>
+
+</figure>
+```
+
+## Arguments
+
+| Argument | Type | Default | Description |
+| --- | --- | --- | --- |
+| `item` | `Object` |  | Object with a `Tags` property equalling an array of string tags |
+| `tags` | `Array` |  | An array of string tags |
+
+## Yields
+
+When used as a block level component the `TagList` yields itself, see above example for usage.
+
+| Property | Type | Description |
+| --- | --- | --- |
+| `Tags` | `Array` | The resulting collection of data after searching/sorting/filtering |

ui/packages/consul-ui/app/components/tag-list/index.hbs

@@ -1,20 +1,29 @@
-{{#if (gt item.Tags.length 0)}}
-  {{#if (has-block)}}
-    {{yield
-      (component 'tag-list' item=item)
+{{#let (union (or @item.Tags (array)) (or @tags (array))) as |tags|}}
+  {{#if (gt tags.length 0)}}
+    {{#if (has-block)}}
+      {{yield
+        (component 'tag-list' item=@item)
+      }}
+    {{else}}
+<dl
+  class="tag-list"
+  ...attributes
+>
+  <dt
+    {{tooltip}}
+  >
+    {{t "components.tag-list.title"
+      default=(array
+        "common.consul.tags"
+      )
     }}
-  {{else}}
-    <dl class="tag-list">
-      <dt>
-        <Tooltip>
-          Tags
-        </Tooltip>
-      </dt>
-      <dd data-test-tags>
-        {{#each item.Tags as |item|}}
-          <span>{{item}}</span>
-        {{/each}}
-      </dd>
-    </dl>
+  </dt>
+  <dd data-test-tags>
+    {{#each tags as |item|}}
+      <span>{{item}}</span>
+    {{/each}}
+  </dd>
+</dl>
+    {{/if}}
   {{/if}}
-{{/if}}
+{{/let}}

ui/packages/consul-ui/tests/acceptance/dc/services/show/tags.feature

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+@setupApplicationTest
+Feature: dc / services / show / tags
+  Background:
+    Given 1 datacenter model with the value "dc1"
+    And 1 node models
+  Scenario: A service with multiple tags
+    Given 1 service model from yaml
+    ---
+    - Service:
+        Name: service
+        Kind: ~
+        Tags:
+          - tag
+          - tag1
+          - tag2
+    ---
+    When I visit the service page for yaml
+    ---
+      dc: dc1
+      service: service
+    ---
+    And I see tags on the tabs
+    When I click tags on the tabs
+    And I see tagsIsSelected on the tabs
+    And I see 3 tag models on the tabs.tagsTab component
+  Scenario: A service with multiple duplicated tags
+    Given 1 service model from yaml
+    ---
+    - Service:
+        Name: service
+        Kind: ~
+        Tags:
+          - tag1
+          - tag2
+          - tag
+          - tag
+          - tag1
+          - tag2
+    ---
+    When I visit the service page for yaml
+    ---
+      dc: dc1
+      service: service
+    ---
+    And I see tags on the tabs
+    When I click tags on the tabs
+    And I see tagsIsSelected on the tabs
+    And I see 3 tag models on the tabs.tagsTab component

ui/packages/consul-ui/tests/acceptance/steps/dc/services/show/tags-steps.js

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+import steps from '../../../steps';
+
+// step definitions that are shared between features should be moved to the
+// tests/acceptance/steps/steps.js file
+
+export default function(assert) {
+  return steps(assert).then('I should find a file', function() {
+    assert.ok(true, this.step);
+  });
+}

ui/packages/consul-ui/tests/pages/dc/services/show.js

@@ -36,5 +36,10 @@ export default function(visitable, clickable, attribute, collection, text, inten
       name: text('[data-test-service-name]'),
     }),
   };
+  page.tabs.tagsTab = {
+    tags: collection('.tag-list dd > span', {
+      name: text(),
+    }),
+  };
   return page;
 }