smarter checking of git version

pkg/app/app_test.go

@@ -0,0 +1,44 @@
+package app
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsGitVersionValid(t *testing.T) {
+	type scenario struct {
+		versionStr     string
+		expectedResult bool
+	}
+
+	scenarios := []scenario{
+		{
+			"",
+			false,
+		},
+		{
+			"git version 1.9.0",
+			false,
+		},
+		{
+			"git version 1.9.0 (Apple Git-128)",
+			false,
+		},
+		{
+			"git version 2.4.0",
+			true,
+		},
+		{
+			"git version 2.24.3 (Apple Git-128)",
+			true,
+		},
+	}
+
+	for _, s := range scenarios {
+		t.Run(s.versionStr, func(t *testing.T) {
+			result := isGitVersionValid(s.versionStr)
+			assert.Equal(t, result, s.expectedResult)
+		})
+	}
+}