Adding upstream version 0.31.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

error_test.go

@@ -0,0 +1,49 @@
+package meilisearch
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestError_VersionErrorHintMessage(t *testing.T) {
+	type args struct {
+		request     *internalRequest
+		mockedError error
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{
+			name: "VersionErrorHintMessageGetDocument",
+			args: args{
+				request: &internalRequest{
+					functionName: "GetDocuments",
+				},
+				mockedError: &Error{
+					Endpoint:         "endpointForGetDocuments",
+					Method:           http.MethodPost,
+					Function:         "GetDocuments",
+					RequestToString:  "empty request",
+					ResponseToString: "empty response",
+					MeilisearchApiError: meilisearchApiError{
+						Message: "empty Meilisearch message",
+					},
+					StatusCode: 1,
+					rawMessage: "empty message",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := VersionErrorHintMessage(tt.args.mockedError, tt.args.request)
+			require.Error(t, err)
+			fmt.Println(err)
+			require.Equal(t, tt.args.mockedError.Error()+". Hint: It might not be working because you're not up to date with the Meilisearch version that "+tt.args.request.functionName+" call requires", err.Error())
+		})
+	}
+}