text: Add text_test.go

.travis.yml

@@ -38,10 +38,7 @@ before_script:
 script:
   - test -z $(gofmt -s -l $GOPATH/src/github.com/hajimehoshi/ebiten)
   - go build -tags example -v github.com/hajimehoshi/ebiten/examples/...
-  - go test -v github.com/hajimehoshi/ebiten
-  - go test -v github.com/hajimehoshi/ebiten/audio/internal/convert
-  - go test -v github.com/hajimehoshi/ebiten/internal/math
-  - go test -v github.com/hajimehoshi/ebiten/internal/restorable
+  - go test -v github.com/hajimehoshi/ebiten/...
   - gopherjs build --tags example -v github.com/hajimehoshi/ebiten/examples/blocks
 
 # Looks like testing GL on node is hard.

text/text_test.go

@@ -0,0 +1,66 @@
+// Copyright 2018 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package text_test
+
+import (
+	"errors"
+	"image/color"
+	"os"
+	"testing"
+
+	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/go-mplusbitmap"
+
+	. "github.com/hajimehoshi/ebiten/text"
+)
+
+func TestMain(m *testing.M) {
+	code := 0
+	// Run an Ebiten process so that (*Image).At is available.
+	regularTermination := errors.New("regular termination")
+	f := func(screen *ebiten.Image) error {
+		code = m.Run()
+		return regularTermination
+	}
+	if err := ebiten.Run(f, 320, 240, 1, "Test"); err != nil && err != regularTermination {
+		panic(err)
+	}
+	os.Exit(code)
+}
+
+func TestTextColor(t *testing.T) {
+	clr := color.RGBA{0x80, 0x80, 0x80, 0x80}
+	img, _ := ebiten.NewImage(30, 30, ebiten.FilterNearest)
+	Draw(img, "Hello", mplusbitmap.Gothic12r, 12, 12, clr)
+
+	w, h := img.Size()
+	allTransparent := true
+	for j := 0; j < h; j++ {
+		for i := 0; i < w; i++ {
+			got := img.At(i, j)
+			want1 := color.RGBA{0x80, 0x80, 0x80, 0x80}
+			want2 := color.RGBA{}
+			if got != want1 && got != want2 {
+				t.Errorf("img At(%d, %d): got %v; want %v or %v", i, j, got, want1, want2)
+			}
+			if got == want1 {
+				allTransparent = false
+			}
+		}
+	}
+	if allTransparent {
+		t.Fail()
+	}
+}