fix(#100): supported file type logic should be case-insensitive

Author: waynezhang

internal/images/image.go

@@ -120,7 +120,7 @@ func GetEXIFValues(path string) (map[string]string, error) {
 }
 
 func extToFormat(ext string) imagemeta.ImageFormat {
-	switch ext {
+	switch strings.ToLower(ext) {
 	case ".jpg", ".jpeg":
 		return imagemeta.JPEG
 	case ".webp":

internal/images/image_test.go

@@ -135,6 +135,9 @@ func TestGetImageEXIF(t *testing.T) {
 	assert.Equal(t, testdata.ExpectedExposureTime, exif["ExposureTime"])
 	assert.Equal(t, testdata.ExpectedISO, exif["ISO"])
 	assert.Equal(t, testdata.ExpectedApertureValue, exif["ApertureValue"])
+
+	exif, err = GetEXIFValues(testdata.MetadataTestFileUpperCase)
+	assert.Nil(t, err)
 }
 
 func TestGetEmptyImageDescription(t *testing.T) {

internal/testdata/testdata.go

@@ -144,13 +144,14 @@ var (
 )
 
 var (
-	MetadataTestFile         = "../../testdata/exif/test.jpg"
-	ExpectedImageDescription = "A brand new description"
-	ExpectedMake             = "FUJIFILM"
-	ExpectedModel            = "GFX 50R"
-	ExpectedExposureTime     = "1/340"
-	ExpectedISO              = "100"
-	ExpectedApertureValue    = "8"
+	MetadataTestFile          = "../../testdata/exif/test.jpg"
+	MetadataTestFileUpperCase = "../../testdata/exif/test.JPG"
+	ExpectedImageDescription  = "A brand new description"
+	ExpectedMake              = "FUJIFILM"
+	ExpectedModel             = "GFX 50R"
+	ExpectedExposureTime      = "1/340"
+	ExpectedISO               = "100"
+	ExpectedApertureValue     = "8"
 
 	PngMetadataTestFile         = "../../testdata/exif/test.png"
 	PngExpectedImageDescription = "A png new description"