Day 20: Part 1 and 2

Signed-off-by: James Griffin <james@unsupervised.ca>

twenty/day_twenty_test.go

@@ -0,0 +1,75 @@
+package twenty
+
+import "testing"
+
+func Test_tile_load(t *testing.T) {
+	m := message{}
+	m.load("sample.txt")
+
+	if len(m.tiles) != 9 {
+		t.Logf("Expected 9 tiles to be loaded, got %d", len(m.tiles))
+		t.FailNow()
+	}
+
+	if len(m.grid) != 3 && len(m.grid[0]) != 3 {
+		t.Logf("Expected a 3x3 grid, got %dx%d", len(m.grid), len(m.grid[0]))
+		t.FailNow()
+	}
+}
+
+func Test_arrange_tile(t *testing.T) {
+	m := message{}
+	m.load("sample.txt")
+
+	result := m.cornerProduct()
+	if result != 20899048083289 {
+		t.Logf("Expected a result of 20899048083289, got %d", result)
+		t.FailNow()
+	}
+}
+
+func Test_arrange_input(t *testing.T) {
+	m := message{}
+	m.load("input.txt")
+
+	result := m.cornerProduct()
+	if result == -1 {
+		t.Logf("Expected a result other than -1, got %d", result)
+		t.FailNow()
+	}
+}
+
+func Test_count_monsters(t *testing.T) {
+	m := message{}
+	m.load("sample.txt")
+
+	grid := m.layout()
+	if !grid {
+		t.Log("Expected a grid")
+		t.FailNow()
+	}
+
+	m.combineTiles()
+	m.alignMonsters()
+
+	result := m.seaMonsters()
+	if result != 2 {
+		t.Logf("Expected 2 monsters, found %d", result)
+		t.FailNow()
+	}
+}
+
+func Test_count_roughness(t *testing.T) {
+	m := message{}
+	m.load("sample.txt")
+
+	m.layout()
+	m.combineTiles()
+	m.alignMonsters()
+
+	result := m.countRoughness()
+	if result != 273 {
+		t.Logf("Expected 273 # not part of a monster, found %d", result)
+		t.FailNow()
+	}
+}