tests(all): improve tests, refactor(api): saving books

utils/utils_test.go

@@ -1,12 +1,26 @@
 package utils
 
-import "testing"
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
 
 func TestCalculatePartialMD5(t *testing.T) {
-	partialMD5, err := CalculatePartialMD5("../_test_files/alice.epub")
+	assert := assert.New(t)
 
-	want := "386d1cb51fe4a72e5c9fdad5e059bad9"
-	if partialMD5 != want {
-		t.Fatalf(`Expected: %v, Got: %v, Error: %v`, want, partialMD5, err)
-	}
+	desiredPartialMD5 := "386d1cb51fe4a72e5c9fdad5e059bad9"
+	calculatedPartialMD5, err := CalculatePartialMD5("../_test_files/alice.epub")
+
+	assert.Nil(err, "error should be nil")
+	assert.Equal(desiredPartialMD5, *calculatedPartialMD5, "should be equal")
+}
+
+func TestCalculateMD5(t *testing.T) {
+	assert := assert.New(t)
+
+	desiredMD5 := "0f36c66155de34b281c4791654d0b1ce"
+	calculatedMD5, err := CalculateMD5("../_test_files/alice.epub")
+
+	assert.Nil(err, "error should be nil")
+	assert.Equal(desiredMD5, *calculatedMD5, "should be equal")
 }