2016-day8: rotating rows & cols of a 2D grid

2016/day08/main_test.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/alexchao26/advent-of-code-go/util"
+)
+
+var example = `rect 3x2
+rotate column x=1 by 1
+rotate row y=0 by 4
+rotate column x=1 by 1`
+
+func Test_twoFA(t *testing.T) {
+	type args struct {
+		instructions  string
+		height, width int
+	}
+	tests := []struct {
+		name             string
+		args             args
+		wantCount        int
+		wantOutputString string
+	}{
+		{"example", args{example, 3, 7}, 6, " #  # #\n# #    \n #     \n"},
+		{"actual", args{util.ReadFile("input.txt"), 6, 50}, 115, `#### #### #### #   ##  # #### ###  ####  ###   ## 
+#    #    #    #   ## #  #    #  # #      #     # 
+###  ###  ###   # # ##   ###  #  # ###    #     # 
+#    #    #      #  # #  #    ###  #      #     # 
+#    #    #      #  # #  #    # #  #      #  #  # 
+#### #    ####   #  #  # #    #  # #     ###  ##  
+`},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotCount, gotString := twoFA(tt.args.instructions, tt.args.height, tt.args.width)
+			if gotCount != tt.wantCount {
+				t.Errorf("twoFA().count = %v, want %v", gotCount, tt.wantCount)
+			}
+			if gotString != tt.wantOutputString {
+				t.Errorf("twoFA().outputString = \n%q, want \n%q", gotString, tt.wantOutputString)
+			}
+		})
+	}
+}