data steps: basic custom mocking function support

I checked out a few libraries but none really behaved
the way I needed, and coding it myself means much lower-
level access, which makes certain options a lot easier
(e.g. excluding one argument of a mocked function from
assertion while matching the rest against a pattern).

1 files changed, 31 insertions, 0 deletions

diff --git a/test/unit/content/dependencies/linkArtist.js b/test/unit/content/dependencies/linkArtist.js
new file mode 100644
index 00000000..6d9e637d
--- /dev/null
+++ b/test/unit/content/dependencies/linkArtist.js
@@ -0,0 +1,31 @@
+import t from 'tap';
+import {testContentFunctions} from '../../../lib/content-function.js';
+
+testContentFunctions(t, 'linkArtist', async (t, evaluate) => {
+  const artistObject = {};
+  const linkTemplate = {};
+
+  await evaluate.load({
+    mock: evaluate.mock(mock => ({
+      linkThing: {
+        relations: mock.function('linkThing.relations', () => ({}))
+          .args([undefined, 'localized.artist', artistObject])
+          .once(),
+
+        data: mock.function('linkThing.data', () => ({}))
+          .args(['localized.artist', artistObject])
+          .once(),
+
+        generate: mock.function('linkThing.data', () => linkTemplate)
+          .once(),
+      }
+    })),
+  });
+
+  const result = evaluate({
+    name: 'linkArtist',
+    args: [artistObject],
+  });
+
+  t.equal(result, linkTemplate);
+});