it "increases count by 1" do
  attributes = attributes_for(:district)
  expect { post admin_districts_path, params: { district: attributes} }.to change { District.count }.by(1)
end

it "increases count by 1" do
  attributes = attributes_for(:district)
  block = { post admin_districts_path, params: { district: attributes} }
  expect(block).to change { District.count }.by(1)
end

syntax error, unexpected '}', expecting keyword_end

it "increases count by 1" do
  attributes = attributes_for(:district)
  expect do
    post admin_districts_path, params: { district: attributes}
  end.to change { District.count }.by(1)
end

block = -> { post admin_districts_path, params: { district: attributes} }
expect(block).to change { District.count }.by(1)

describe "create /district" do
    def create_district_request
      @district = build(:district)
      params = {district: {name: @district.name etc.}}
      post district_path, params: params
    end

    it "creates a district" do
      expect {create_district_request}.to change{District.count}.by(1)
    end
end