1 files changed, 74 insertions, 0 deletions
diff --git a/test/unit/data/composite/common-utilities/exposeDependency.js b/test/unit/data/composite/common-utilities/exposeDependency.js
new file mode 100644
index 00000000..78801343
--- /dev/null
+++ b/test/unit/data/composite/common-utilities/exposeDependency.js
@@ -0,0 +1,74 @@
+import t from 'tap';
+
+import {
+  compositeFrom,
+  continuationSymbol,
+  exposeDependency,
+  input,
+} from '#composite';
+
+t.test(`exposeDependency: basic behavior`, t => {
+  t.plan(4);
+
+  const composite1 = compositeFrom({
+    compose: false,
+
+    steps: [
+      exposeDependency({dependency: 'foo'}),
+    ],
+  });
+
+  t.match(composite1, {
+    expose: {
+      dependencies: ['foo'],
+    },
+  });
+
+  t.equal(composite1.expose.compute({foo: 'bar'}), 'bar');
+
+  const composite2 = compositeFrom({
+    compose: false,
+
+    steps: [
+      {
+        dependencies: ['foo'],
+        compute: (continuation, {foo}) =>
+          continuation({'#bar': foo.toUpperCase()}),
+      },
+
+      exposeDependency({dependency: '#bar'}),
+    ],
+  });
+
+  t.match(composite2, {
+    expose: {
+      dependencies: ['foo'],
+    },
+  });
+
+  t.equal(composite2.expose.compute({foo: 'bar'}), 'BAR');
+});
+
+t.test(`exposeDependency: validate inputs`, t => {
+  t.plan(2);
+
+  t.throws(
+    () => exposeDependency({}),
+    {
+      message: `Errors in input options passed to exposeDependency`,
+      errors: [
+        {message: `Required these inputs: dependency`},
+      ],
+    });
+
+  t.throws(
+    () => exposeDependency({
+      dependency: input.value('some static value'),
+    }),
+    {
+      message: `Errors in input options passed to exposeDependency`,
+      errors: [
+        {message: `dependency: Expected dependency name, got input.value() call`},
+      ],
+    });
+});