add test to replicate #751

Author: umbynos

tools/download_test.go

@@ -16,16 +16,53 @@
 package tools
 
 import (
+	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"net/http"
 	"os"
 	"path"
 	"testing"
 
+	"github.com/arduino/go-paths-helper"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
+func TestDownloadCorrectPlatform(t *testing.T) {
+	testCases := []struct {
+		hostOS        string
+		hostArch      string
+		correctOSArch string
+	}{
+		{"linux", "amd64", "x86_64-linux-gnu"},
+		{"linux", "386", "i686-linux-gnu"},
+		{"darwin", "amd64", "x86_64-apple-darwin"},
+		{"darwin", "arm64", "arm64-apple-darwin"},
+		{"windows", "386", "i686-mingw32"},
+		{"windows", "amd64", "i686-mingw32"},
+		{"linux", "arm", "arm-linux-gnueabihf"},
+	}
+	testIndex := paths.New("testdata", "test_tool_index.json")
+	buf, err := testIndex.ReadFile()
+	require.NoError(t, err)
+
+	var data index
+	err = json.Unmarshal(buf, &data)
+	require.NoError(t, err)
+	for _, tc := range testCases {
+		OS = tc.hostOS     // override `runtime.OS` for testing purposes
+		Arch = tc.hostArch // override `runtime.ARCH` for testing purposes
+		// Find the tool by name
+		correctTool, correctSystem := findTool("arduino-test", "arduino-fwuploader", "2.2.2", data)
+		require.NotNil(t, correctTool)
+		require.NotNil(t, correctSystem)
+		require.Equal(t, correctTool.Name, "arduino-fwuploader")
+		require.Equal(t, correctTool.Version, "2.2.2")
+		require.Equal(t, correctSystem.Host, tc.correctOSArch)
+	}
+}
+
 func Test_findBaseDir(t *testing.T) {
 	cases := []struct {
 		dirList []string