2 files changed, 81 insertions, 7 deletions
diff --git a/test/unit/data/composite/compositeFrom.js b/test/unit/data/composite/compositeFrom.js
index 6ae1e7bc..06a66e61 100644
--- a/test/unit/data/composite/compositeFrom.js
+++ b/test/unit/data/composite/compositeFrom.js
@@ -1,14 +1,8 @@
 import t from 'tap';
 
+import {compositeFrom, continuationSymbol, input} from '#composite';
 import {isString} from '#validators';
 
-import {
-  compositeFrom,
-  continuationSymbol,
-  debugComposite,
-  input,
-} from '#composite';
-
 t.test(`compositeFrom: basic behavior`, t => {
   t.plan(2);
 
diff --git a/test/unit/data/composite/exposeDependency.js b/test/unit/data/composite/exposeDependency.js
new file mode 100644
index 00000000..7487e44c
--- /dev/null
+++ b/test/unit/data/composite/exposeDependency.js
@@ -0,0 +1,80 @@
+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);
+
+  let caughtError;
+
+  try {
+    caughtError = null;
+    exposeDependency({});
+  } catch (error) {
+    caughtError = error;
+  }
+
+  t.match(caughtError, {
+    errors: [/Required these inputs: dependency/],
+  });
+
+  try {
+    caughtError = null;
+    exposeDependency({
+      dependency: input.value('some static value'),
+    });
+  } catch (error) {
+    caughtError = error;
+  }
+
+  t.match(caughtError, {
+    errors: [/Expected static dependencies: dependency/],
+  });
+});