From b07af2798dc6c4204d9f1d9f5cd842f8eca79393 Mon Sep 17 00:00:00 2001
From: Marcus Fihlon <marcus@fihlon.swiss>
Date: Mon, 25 Mar 2024 12:55:29 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=9A=A7=20generate=20better=20sample=20dat?=
 =?UTF-8?q?a?=
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Signed-off-by: Marcus Fihlon <marcus@fihlon.swiss>
---
 .../apus/service/ConferenceService.java       | 55 +++++++++++--------
 .../apus/service/ConferenceServiceTest.java   | 10 ++--
 2 files changed, 36 insertions(+), 29 deletions(-)

diff --git a/src/main/java/swiss/fihlon/apus/service/ConferenceService.java b/src/main/java/swiss/fihlon/apus/service/ConferenceService.java
index b7b8712..a50d587 100644
--- a/src/main/java/swiss/fihlon/apus/service/ConferenceService.java
+++ b/src/main/java/swiss/fihlon/apus/service/ConferenceService.java
@@ -36,29 +36,7 @@ public final class ConferenceService {
     private final List<Session> sessions;
 
     public ConferenceService() {
-        sessions = new ArrayList<>(100);
-
-        int lastMinute = -1;
-        String room = "";
-        for (int counter = 0; counter < 100; counter++) {
-            final String id = UUID.randomUUID().toString();
-            final LocalDateTime startDate = LocalDateTime.now()
-                    .plusMinutes(Math.round(counter / 3f + 0.5f)) // 3 sessions start each minute
-                    .truncatedTo(ChronoUnit.SECONDS)
-                    .withSecond(0);
-            final LocalDateTime endDate = startDate.plusMinutes(1);
-
-            final int minute = startDate.getMinute();
-            if (minute == lastMinute) {
-                room = String.valueOf((char) (room.charAt(0) + 1));
-            } else {
-                lastMinute = minute;
-                room = "A";
-            }
-            final String title = "Test Session #" + counter;
-            final String speaker = "Speaker #" + counter;
-            sessions.add(new Session(id, startDate, endDate, room, title, speaker));
-        }
+        sessions = generateSampleData();
     }
 
     public List<Session> getRunningSessions() {
@@ -90,4 +68,35 @@ public List<Session> getNextSessions() {
         return nextSessions;
     }
 
+    private List<Session> generateSampleData() {
+        final int sampleDataSize = 100;
+        final int sampleSessionParallel = 5;
+        final int sampleDuration = 5;
+
+        final List<Session> sampleData = new ArrayList<>(sampleDataSize);
+
+        LocalDateTime startDate = LocalDateTime.now()
+                .truncatedTo(ChronoUnit.SECONDS)
+                .withSecond(0)
+                .minusMinutes(5);
+        while (startDate.getMinute() % 5 != 0) {
+            startDate = startDate.minusMinutes(1);
+        }
+
+        while (sampleData.size() < sampleDataSize) {
+            for (int counter = 0; counter < sampleSessionParallel; counter++) {
+                final int index = sampleData.size();
+                final String id = UUID.randomUUID().toString();
+                final LocalDateTime endDate = startDate.plusMinutes(sampleDuration);
+                final String room = String.valueOf((char) ('A' + counter));
+                final String title = "Test Session #" + index;
+                final String speaker = "Speaker #" + (counter + 1);
+                sampleData.add(new Session(id, startDate, endDate, room, title, speaker));
+            }
+            startDate = startDate.plusMinutes(sampleDuration);
+        }
+
+        return sampleData;
+    }
+
 }
diff --git a/src/test/java/swiss/fihlon/apus/service/ConferenceServiceTest.java b/src/test/java/swiss/fihlon/apus/service/ConferenceServiceTest.java
index 3cbd1e0..d783537 100644
--- a/src/test/java/swiss/fihlon/apus/service/ConferenceServiceTest.java
+++ b/src/test/java/swiss/fihlon/apus/service/ConferenceServiceTest.java
@@ -18,18 +18,16 @@
 package swiss.fihlon.apus.service;
 
 import org.junit.jupiter.api.Test;
-import swiss.fihlon.apus.conference.Session;
-
-import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class ConferenceServiceTest {
 
     @Test
-    void getSessions() {
+    void displaySampleData() {
         final ConferenceService conferenceService = new ConferenceService();
-        final List<Session> sessions = conferenceService.getNextSessions();
-        assertEquals(3, sessions.size());
+        assertEquals(5, conferenceService.getRunningSessions().size());
+        assertEquals(5, conferenceService.getNextSessions().size());
+        assertEquals(90, conferenceService.getFutureSessions().size());
     }
 }