2017-day19: simple following a 2D path

2017/day19/main_test.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/alexchao26/advent-of-code-go/util"
+)
+
+// easier to look at this input in the format, but need to remove leading/trailing newlines
+var example = strings.Trim(`
+    |         
+    |  +--+   
+    A  |  C   
+F---|----E|--+
+    |  |  |  D
+    +B-+  +--+
+`, "\n")
+
+func Test_movePacket(t *testing.T) {
+	tests := []struct {
+		name             string
+		input            string
+		wantVisitedChars string
+		wantSteps        int
+	}{
+		{"example", example, "ABCDEF", 38},
+		{"actual", util.ReadFile("input.txt"), "EPYDUXANIT", 17544},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotVisitedChars, gotSteps := movePacket(tt.input)
+			if gotVisitedChars != tt.wantVisitedChars {
+				t.Errorf("movePacket() gotVisitedChars = %v, want %v", gotVisitedChars, tt.wantVisitedChars)
+			}
+			if gotSteps != tt.wantSteps {
+				t.Errorf("movePacket() gotSteps = %v, want %v", gotSteps, tt.wantSteps)
+			}
+		})
+	}
+}