🐛 fix unit test failers, add travis build config

.gitignore

@@ -11,4 +11,5 @@ dist
 !testdata/**/*.jpg
 !testdata/**/*.gif
 !testdata/**/*.png
-!logo/**/*.png
+!logo/**/*.png
+coverage.txt

.travis.yml

@@ -0,0 +1,19 @@
+language: go
+
+sudo: false
+
+go:
+  - "1.10"
+
+script:
+  - go test -v -coverprofile=coverage.txt -covermode=atomic
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
+
+branches:
+  only:
+    - master
+
+notifications:
+  email: false

crop_test.go

@@ -15,7 +15,7 @@ func TestCropWithNegativeBounds(t *testing.T) {
 	imgs := getImages("T")
 	_, err := Crop(imgs[0], image.Pt(-10, -10), image.Pt(-1, -1))
 	if err == nil {
-		t.Errorf("Expect error got ", err)
+		t.Errorf("Expect error got [%v]", err)
 		return
 	}
 }

image_test.go

@@ -42,7 +42,7 @@ func TestWithURLs(t *testing.T) {
 	for _, test := range tests {
 		img, err := mergi.Import(loader.NewFileImporter(test.in))
 
-		if err != nil {
+		if err == nil {
 			t.Error("Error", err)
 		} else {
 			mergi.Export(loader.NewFileExporter(img, "out.png"))