Implemented phase 0 for the POC prototype in the Website service.

Services/Website/Tests/Library/Cases/Internal/Components/SiteFooterTests.swift

@@ -0,0 +1,40 @@
+import Elementary
+import Testing
+
+@testable import WebsiteLibrary
+
+@Suite(
+    "SiteFooter component",
+    .tags(.component)
+)
+struct SiteFooterTests {
+
+    // MARK: Functional tests
+
+    @Test
+    func `renders its link columns`() {
+        let html = SiteFooter().render()
+
+        for title in ["Browse", "Sell", "Account", "Language"] {
+            #expect(html.contains(">\(title)</h2>"))
+        }
+
+        for path in [String.Route.series, .Route.openShop, .Route.gradingGuide, .Route.signIn, .Route.recover, .Route.terms] {
+            #expect(html.contains(#"href="\#(path)""#))
+        }
+    }
+
+    @Test
+    func `escapes the ampersands in its labels`() {
+        #expect(SiteFooter().render().contains("Want list &amp; alerts"))
+    }
+
+    @Test
+    func `presses the one language the prototype serves`() {
+        let html = SiteFooter().render()
+
+        #expect(html.components(separatedBy: #"aria-pressed="true""#).count - 1 == 1)
+        #expect(html.contains(#"aria-pressed="true">EN<"#))
+    }
+
+}