Solve day 5

day5/main_test.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_compactedRanges(t *testing.T) {
+	tests := []struct {
+		name   string // description of this test case
+		ranges []idsRange
+		want   []idsRange
+	}{
+		{
+			name: "single",
+			ranges: []idsRange{
+				{0, 10},
+			},
+			want: []idsRange{
+				{0, 10},
+			},
+		},
+		{
+			name: "identical",
+			ranges: []idsRange{
+				{0, 10},
+				{0, 10},
+				{0, 10},
+				{20, 30},
+				{20, 30},
+			},
+			want: []idsRange{
+				{0, 10},
+				{20, 30},
+			},
+		},
+		{
+			name: "simple",
+			ranges: []idsRange{
+				{0, 10},
+				{2, 11},
+				{20, 30},
+			},
+			want: []idsRange{
+				{0, 11},
+				{20, 30},
+			},
+		},
+		{
+			name: "swallows",
+			ranges: []idsRange{
+				{0, 10},
+				{2, 8},
+				{20, 30},
+			},
+			want: []idsRange{
+				{0, 10},
+				{20, 30},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, compactedRanges(tt.ranges))
+		})
+	}
+}