tests: integration tests for third-party packages (#112)

Closes #103

tests/thirdparty/config_test.go

@@ -0,0 +1,51 @@
+package thirdparty
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestPackageName(t *testing.T) {
+	p := Package{ImportPath: "github.com/username/repo"}
+	if p.Name() != "repo" {
+		t.Fail()
+	}
+}
+
+func TestPackageCloneURL(t *testing.T) {
+	p := Package{ImportPath: "github.com/username/repo"}
+	if p.CloneURL() != "https://github.com/username/repo.git" {
+		t.Fail()
+	}
+}
+
+func TestLoadPackages(t *testing.T) {
+	r := strings.NewReader(`[{"unknown_field": "value"}]`)
+	_, err := LoadPackages(r)
+	if err == nil {
+		t.Fatal("expected non-nil error")
+	}
+}
+
+func TestLoadPackagesFile(t *testing.T) {
+	pkgs, err := LoadPackagesFile("packages.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, pkg := range pkgs {
+		t.Log(pkg.ImportPath)
+	}
+	if len(pkgs) == 0 {
+		t.Fatal("no packages loaded")
+	}
+}
+
+func TestLoadPackagesFileNotExist(t *testing.T) {
+	pkgs, err := LoadPackagesFile("does_not_exist")
+	if pkgs != nil {
+		t.Fatal("expected nil return")
+	}
+	if err == nil {
+		t.Fatal("expected non-nil error")
+	}
+}