Unit tests for deps DS utility funcs

Signed-off-by: Adolfo García Veytia (Puerco) <puerco@stacklok.com>

internal/datasources/deps/handler_test.go

@@ -0,0 +1,68 @@
+// SPDX-FileCopyrightText: Copyright 2024 The Minder Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package deps implements a data source that extracts dependencies from
+// a filesystem or file.
+package deps
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestValidateArgs(t *testing.T) {
+	h := depsDataSourceHandler{}
+	t.Parallel()
+	for _, tc := range []struct {
+		name    string
+		args    any
+		mustErr bool
+	}{
+		{name: "no-args", args: nil, mustErr: false},
+		{name: "wrong-type", args: struct{}{}, mustErr: true},
+		{name: "no-path", args: map[string]any{"ecosystems": []string{"npm"}}, mustErr: false},
+		{name: "blank-path", args: map[string]any{"path": "", "ecosystems": []string{"npm"}}, mustErr: false},
+		{name: "path-set", args: map[string]any{"path": "directory/", "ecosystems": []string{"npm"}}, mustErr: false},
+		{name: "no-ecosystems", args: map[string]any{"path": "directory/"}, mustErr: false},
+		{name: "ecosystems-empty", args: map[string]any{"path": "directory/", "ecosystems": []string{}}, mustErr: false},
+		{name: "ecosystems-nil", args: map[string]any{"path": "directory/", "ecosystems": nil}, mustErr: false},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			res := h.ValidateArgs(tc.args)
+			if tc.mustErr {
+				require.Error(t, res)
+				return
+			}
+			require.NoError(t, res)
+		})
+	}
+}
+
+func TestValidateEcosystems(t *testing.T) {
+	t.Parallel()
+	for _, tc := range []struct {
+		name    string
+		list    any
+		mustErr bool
+	}{
+		{"empty-list", nil, false},
+		{"valid-list-0", []string{}, false},
+		{"valid-list-1", []string{"npm"}, false},
+		{"valid-list-1+", []string{"npm", "pypi", "cargo"}, false},
+		{"invalid-type", []string{"npm", "Hello!", "cargo"}, true},
+		{"other-something", []struct{}{}, true},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			errs := validateEcosystems(tc.list)
+			if tc.mustErr {
+				require.Error(t, errors.Join(errs...))
+				return
+			}
+			require.Len(t, errs, 0)
+		})
+	}
+}