test(*): add unit tests

internal/cache/cache_test.go

@@ -0,0 +1,70 @@
+package cache_test
+
+import (
+	"testing"
+
+	"github.com/Nightapes/go-semantic-release/internal/cache"
+	"github.com/stretchr/testify/assert"
+	"io/ioutil"
+	"os"
+	"path"
+)
+
+func TestReadCacheNotFound(t *testing.T) {
+
+	_, err := cache.Read("notfound/dir")
+	assert.Errorf(t, err, "Read non exsiting file")
+
+}
+
+func TestReadCacheInvalidContent(t *testing.T) {
+
+	dir, err := ioutil.TempDir("", "prefix")
+	assert.NoError(t, err)
+	defer os.RemoveAll(dir)
+
+	completePath := path.Join(path.Dir(dir), ".version")
+	brokenContent := []byte("hello broken\ngo: lang\n")
+	ioutil.WriteFile(completePath, brokenContent, 0644)
+
+	_, readError := cache.Read(dir)
+	assert.Errorf(t, readError, "Should give error, when broken content")
+
+}
+
+func TestWriteAndReadCache(t *testing.T) {
+
+	dir, err := ioutil.TempDir("", "prefix")
+
+	assert.NoError(t, err)
+
+	content := cache.ReleaseVersion{
+		Last: cache.ReleaseVersionEntry{
+			Commit:  "12345",
+			Version: "1.0.0",
+		},
+		Next: cache.ReleaseVersionEntry{
+			Commit:  "12346",
+			Version: "1.1.0",
+		},
+		Branch: "master",
+		Draft:  true,
+	}
+
+	defer os.RemoveAll(dir)
+
+	writeError := cache.Write(dir, content)
+	assert.NoErrorf(t, writeError, "Should write file")
+	result, readError := cache.Read(dir)
+	assert.NoErrorf(t, readError, "Should read file")
+
+	assert.Equal(t, &content, result)
+
+}
+
+func TestWriteNotFound(t *testing.T) {
+
+	err := cache.Write("notfound/dir", cache.ReleaseVersion{})
+	assert.Errorf(t, err, "Write non exsiting file")
+
+}