add unit-test

pkg/buildcontext/git_test.go

@@ -0,0 +1,42 @@
+package buildcontext
+
+import (
+	"github.com/GoogleContainerTools/kaniko/testutil"
+	"os"
+	"testing"
+)
+
+func TestGetGitPullMethod(t *testing.T) {
+	tests := []struct {
+		setEnv        func()
+		expectedValue string
+	}{
+		{
+			setEnv:        func() {},
+			expectedValue: "https",
+		},
+		{
+			setEnv: func() {
+				_ = os.Setenv(gitPullMethodEnvKey, "http")
+			},
+			expectedValue: "http",
+		},
+		{
+			setEnv: func() {
+				_ = os.Setenv(gitPullMethodEnvKey, "https")
+			},
+			expectedValue: "https",
+		},
+		{
+			setEnv: func() {
+				_ = os.Setenv(gitPullMethodEnvKey, "unknown")
+			},
+			expectedValue: "https",
+		},
+	}
+
+	for _, tt := range tests {
+		tt.setEnv()
+		testutil.CheckDeepEqual(t, getGitPullMethod(), tt.expectedValue)
+	}
+}