From 9773977496467289ff46622b8a32e5e2f5f4fc2f Mon Sep 17 00:00:00 2001
From: Christophe Robillard <christophe.robillard@beta.gouv.fr>
Date: Fri, 12 Aug 2022 17:37:30 +0200
Subject: [PATCH] know if a zone exist at a specific date

---
 app/models/zone.rb       |  4 ++++
 spec/models/zone_spec.rb | 31 +++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/app/models/zone.rb b/app/models/zone.rb
index ccb1205a9..73af1eb74 100644
--- a/app/models/zone.rb
+++ b/app/models/zone.rb
@@ -23,4 +23,8 @@ class Zone < ApplicationRecord
       date >= designated_on
     end.at(1)
   end
+
+  def available_at?(date)
+    label_at(date) != 'NA'
+  end
 end
diff --git a/spec/models/zone_spec.rb b/spec/models/zone_spec.rb
index 8cc0becf0..75dbb7e7e 100644
--- a/spec/models/zone_spec.rb
+++ b/spec/models/zone_spec.rb
@@ -34,5 +34,36 @@ describe Zone do
       expect(zone.label_at(start_previous_government - 1.week)).to eq "Ministère de l'Économie, des Finances et de la Relance"
     end
   end
+
+  describe "#available_at?" do
+    let(:start_previous_government) { Date.parse('2020-07-06') }
+    let(:start_last_government) { Date.parse('2022-05-20') }
+    let(:start_futur_government) { Date.parse('2027-05-20') }
+    let(:zone) do
+      create(:zone, labels: [
+        {
+          designated_on: start_previous_government,
+          name: "Ministère des Outre-mer"
+        },
+        {
+          designated_on: start_last_government,
+          name: "NA"
+        },
+        {
+          designated_on: start_futur_government,
+          name: "Ministère des Territoires d'Outre-mer"
+        }
+      ])
+    end
+
+    it "returns false if the zone does'nt exist at a specific date" do
+      expect(zone.available_at?(start_last_government + 1.week)).to be_falsy
+    end
+
+    it "returns true if the zone exist at a specific date" do
+      expect(zone.available_at?(start_futur_government + 1.week)).to be_truthy
+      expect(zone.available_at?(start_previous_government + 1.week)).to be_truthy
+    end
+  end
 end