From 4098a882ca0dfa1f785ecf5800cb1efcbcfe44a4 Mon Sep 17 00:00:00 2001
From: Paul Buetow <pbuetow@mimecast.com>
Date: Mon, 24 Aug 2020 14:17:34 +0100
Subject: elementary priority queue

---
 queue/pq_test.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 queue/pq_test.go

(limited to 'queue/pq_test.go')

diff --git a/queue/pq_test.go b/queue/pq_test.go
new file mode 100644
index 0000000..35e12fd
--- /dev/null
+++ b/queue/pq_test.go
@@ -0,0 +1,42 @@
+package queue
+
+import (
+	"algorithms/ds"
+	"fmt"
+	"testing"
+)
+
+const minLength int = 1
+const maxLength int = 1000
+const factor int = 10
+
+func TestElementaryPQ(t *testing.T) {
+	q := NewElementaryPQ(1)
+	for i := minLength; i <= maxLength; i *= factor {
+		test(q, i, t)
+	}
+}
+
+func test(q PQ, l int, t *testing.T) {
+	cb := func(t *testing.T) {
+		t.Parallel()
+		for _, a := range ds.NewRandomArrayList(l, -1) {
+			q.Insert(a)
+		}
+		prev, started := 0, false
+		for !q.Empty() {
+			next := q.DeleteMax()
+			if started {
+				if next < prev {
+					t.Errorf("Expected element '%v' to be lower than previous '%v': %v",
+						next, prev, q)
+				}
+				prev = next
+				continue
+			}
+			started = true
+			prev = next
+		}
+	}
+	t.Run(fmt.Sprintf("%d", l), cb)
+}
-- 
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