minecraft - maps/decode_test.go

     1  package maps
     2  
     3  import (
     4  	"compress/gzip"
     5  	"fmt"
     6  	"image"
     7  	"image/png"
     8  	"io"
     9  	"os"
    10  	"testing"
    11  )
    12  
    13  func TestDecode(t *testing.T) {
    14  	f, err := os.Open("map_0.dat")
    15  	if err != nil {
    16  		t.Errorf("unexpected error: %s", err)
    17  		return
    18  	}
    19  	r, err := gzip.NewReader(f)
    20  	if err != nil {
    21  		t.Errorf("unexpected error: %s", err)
    22  		return
    23  	}
    24  	i, n, err := image.Decode(r)
    25  	r.Close()
    26  	f.Close()
    27  	if err != nil {
    28  		t.Errorf("unexpected error: %s", err)
    29  		return
    30  	} else if n != "minecraftmap" {
    31  		t.Errorf("expecting image type %q, got %q", "minecraftmap", n)
    32  		return
    33  	}
    34  	g, err := os.Create("t.png")
    35  	if err != nil {
    36  		t.Errorf("unexpected error: %s", err)
    37  		return
    38  	}
    39  	png.Encode(g, i)
    40  	g.Close()
    41  }
    42  
    43  func TestEncode(t *testing.T) {
    44  	f, err := os.Open("go.png")
    45  	if err != nil {
    46  		t.Errorf("unexpected error: %s", err)
    47  		return
    48  	}
    49  	im, _, err := image.Decode(f)
    50  	if err != nil {
    51  		t.Errorf("unexpected error: %s", err)
    52  		return
    53  	}
    54  	f.Close()
    55  	pr, pw := io.Pipe()
    56  	go Encode(pw, im)
    57  	im, _, err = image.Decode(pr)
    58  	if err != nil {
    59  		t.Errorf("unexpected error: %s", err)
    60  		return
    61  	}
    62  	g, err := os.Create("got.png")
    63  	if err != nil {
    64  		t.Errorf("unexpected error: %s", err)
    65  		return
    66  	}
    67  	png.Encode(g, im)
    68  	g.Close()
    69  }
    70  
    71  func TestConfig(t *testing.T) {
    72  	f, err := os.Open("map_0.dat")
    73  	if err != nil {
    74  		t.Errorf("unexpected error: %s", err)
    75  		return
    76  	}
    77  	r, err := gzip.NewReader(f)
    78  	if err != nil {
    79  		t.Errorf("unexpected error: %s", err)
    80  		return
    81  	}
    82  	c, n, err := image.DecodeConfig(r)
    83  	r.Close()
    84  	f.Close()
    85  	if err != nil {
    86  		t.Errorf("unexpected error: %s", err)
    87  		return
    88  	} else if n != "minecraftmap" {
    89  		t.Errorf("expecting image type %q, got %q", "minecraftmap", n)
    90  		return
    91  	}
    92  	fmt.Println(c)
    93  }
    94