Added set tests

src/set/Ordered_test.go

@@ -0,0 +1,27 @@
+package set_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/set"
+	"git.urbach.dev/go/assert"
+)
+
+func TestOrdered(t *testing.T) {
+	s := set.Ordered[int]{}
+	assert.Equal(t, s.Count(), 0)
+	s.Add(1)
+	assert.Equal(t, s.Count(), 1)
+	s.Add(2)
+	assert.Equal(t, s.Count(), 2)
+	s.Add(3)
+	assert.Equal(t, s.Count(), 3)
+	s.Add(1)
+	assert.Equal(t, s.Count(), 3)
+
+	for element := range s.All() {
+		if element == 2 {
+			break
+		}
+	}
+}