Merge pull request #3975 from MetaMask/i3947-composableStore

Add ComposableObservableStore for subscription management

1 files changed, 35 insertions, 0 deletions

diff --git a/test/unit/ComposableObservableStore.js b/test/unit/ComposableObservableStore.js
new file mode 100644
index 000000000..3fba200c1
--- /dev/null
+++ b/test/unit/ComposableObservableStore.js
@@ -0,0 +1,35 @@
+const assert = require('assert')
+const ComposableObservableStore = require('../../app/scripts/lib/ComposableObservableStore')
+const ObservableStore = require('obs-store')
+
+describe('ComposableObservableStore', () => {
+  it('should register initial state', () => {
+    const store = new ComposableObservableStore('state')
+    assert.strictEqual(store.getState(), 'state')
+  })
+
+  it('should register initial structure', () => {
+    const testStore = new ObservableStore()
+    const store = new ComposableObservableStore(null, { TestStore: testStore })
+    testStore.putState('state')
+    assert.deepEqual(store.getState(), { TestStore: 'state' })
+  })
+
+  it('should update structure', () => {
+    const testStore = new ObservableStore()
+    const store = new ComposableObservableStore()
+    store.updateStructure({ TestStore: testStore })
+    testStore.putState('state')
+    assert.deepEqual(store.getState(), { TestStore: 'state' })
+  })
+
+  it('should return flattened state', () => {
+    const fooStore = new ObservableStore({ foo: 'foo' })
+    const barStore = new ObservableStore({ bar: 'bar' })
+    const store = new ComposableObservableStore(null, {
+      FooStore: fooStore,
+      BarStore: barStore,
+    })
+    assert.deepEqual(store.getFlatState(), { foo: 'foo', bar: 'bar' })
+  })
+})