Add institution management and account editing controls (#868)

* Add institution management

* Allow user to select institution on create or edit

* Improve redirect behavior

* Final cleanup

* i18n normalization

test/controllers/institutions_controller_test.rb

@@ -0,0 +1,55 @@
+require "test_helper"
+
+class InstitutionsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in users(:family_admin)
+    @institution = institutions(:chase)
+  end
+
+  test "should get new" do
+    get new_institution_url
+    assert_response :success
+  end
+
+  test "can create institution" do
+    assert_difference("Institution.count", 1) do
+      post institutions_url, params: {
+        institution: {
+          name: "New institution"
+        }
+      }
+    end
+
+    assert_redirected_to accounts_url
+    assert_equal "Institution created", flash[:notice]
+  end
+
+  test "should get edit" do
+    get edit_institution_url(@institution)
+
+    assert_response :success
+  end
+
+  test "should update institution" do
+    patch institution_url(@institution), params: {
+      institution: {
+        name: "New Institution Name",
+        logo: file_fixture_upload("square-placeholder.png", "image/png", :binary)
+      }
+    }
+
+    assert_redirected_to accounts_url
+    assert_equal "Institution updated", flash[:notice]
+  end
+
+  test "can destroy institution without destroying accounts" do
+    assert @institution.accounts.count > 0
+
+    assert_difference -> { Institution.count } => -1, -> { Account.count } => 0 do
+      delete institution_url(@institution)
+    end
+
+    assert_redirected_to accounts_url
+    assert_equal "Institution deleted", flash[:notice]
+  end
+end