added new maze (15x15) for testing purposes

io/reader/image_test.go

@@ -78,6 +78,30 @@ func TestImageReader(t *testing.T) {
 				{0b_00000100, 0b000_00000},
 			},
 		},
+		{
+			"Normal2",
+			15, 15,
+			20, 20,
+			white, black,
+			"../../assets/normal2.png",
+			[][]byte{
+				{0b00000001, 0b0000000_0},
+				{0b01110111, 0b1111010_0},
+				{0b00010100, 0b0001010_0},
+				{0b01110111, 0b1101110_0},
+				{0b01000000, 0b0000010_0},
+				{0b01111101, 0b1111010_0},
+				{0b00010101, 0b0000010_0},
+				{0b01110111, 0b0111010_0},
+				{0b01000100, 0b0101010_0},
+				{0b01011101, 0b1101110_0},
+				{0b01000101, 0b0000000_0},
+				{0b01110101, 0b0111110_0},
+				{0b01010001, 0b0001010_0},
+				{0b01011111, 0b1111010_0},
+				{0b00000001, 0b0000000_0},
+			},
+		},
 	}
 
 	for _, test := range tests {

io/writer/image_test.go

@@ -0,0 +1,75 @@
+package writer
+
+import (
+	"image/color"
+	"maze-solver/maze"
+	"testing"
+
+	"github.com/mazznoer/colorgrad"
+)
+
+func TestImageWriter(t *testing.T) {
+	pathGradient, err := colorgrad.NewGradient().Colors(color.White).Build()
+	if err != nil {
+		panic(err)
+	}
+
+	tests := []struct {
+		name                  string
+		filename              string
+		m                     *maze.SolvedMaze
+		CellWidth, cellHeight int
+		pathColor, wallColor  color.Color
+		gradient              colorgrad.Gradient
+	}{
+		{
+			"Trivial",
+			"../../out/trivial_sol.png",
+			trivial(),
+			40, 40,
+			color.White, color.Black,
+			colorgrad.Warm(),
+		},
+		{
+			"Bigger",
+			"../../out/bigger_sol.png",
+			bigger(),
+			40, 40,
+			color.White, color.Black,
+			colorgrad.Warm(),
+		},
+		{
+			"Bigger Staggered",
+			"../../out/bigger_staggered_sol.png",
+			bigger_staggered(),
+			40, 40,
+			color.White, color.Black,
+			pathGradient,
+		},
+		{
+			"Normal",
+			"../../out/normal_sol.png",
+			normal(),
+			40, 40,
+			color.White, color.Black,
+			colorgrad.Warm(),
+		},
+	}
+
+	for _, test := range tests {
+		writer := ImageWriter{
+			Filename:         test.filename,
+			Maze:             test.m,
+			CellWidth:        test.CellWidth,
+			CellHeight:       test.cellHeight,
+			WallColor:        test.wallColor,
+			PathColor:        test.pathColor,
+			SolutionGradient: test.gradient,
+		}
+
+		err := writer.Write()
+		if err != nil {
+			t.Fatalf("%s: couldn't write solution, got following error\n%v", test.name, err)
+		}
+	}
+}