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// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Paul Buetow
package repl
import (
"strings"
"testing"
)
func TestGetHelpEmptyReturnsOverview(t *testing.T) {
output := GetHelp("")
if !strings.Contains(output, "gt") {
t.Error("General help should mention 'gt'")
}
if !strings.Contains(output, "help categories") {
t.Error("General help should mention 'help categories'")
}
if !strings.Contains(output, "Arithmetic") {
t.Error("General help should list Arithmetic section")
}
}
func TestGetHelpCategories(t *testing.T) {
output := GetHelp("categories")
if !strings.Contains(output, "REPL") {
t.Error("Categories should list REPL")
}
if !strings.Contains(output, "Arithmetic") {
t.Error("Categories should list Arithmetic")
}
if !strings.Contains(output, "Hyper") {
t.Error("Categories should list Hyper")
}
}
func TestGetHelpClearReturnsREPL(t *testing.T) {
// "clear" exists in both REPL (screen clear) and Variables (clear vars)
// helpByTopic should prefer the REPL entry
output := GetHelp("clear")
if !strings.Contains(output, "screen") && !strings.Contains(output, "terminal") {
t.Errorf("'help clear' should show REPL screen clear, got: %s", output[:80])
}
}
func TestGetHelpKnownOperator(t *testing.T) {
output := GetHelp("+")
if !strings.Contains(output, "Add") {
t.Errorf("'help +' should describe Add, got: %s", output[:80])
}
if !strings.Contains(output, "Examples:") {
t.Error("'help +' should have examples")
}
if !strings.Contains(output, "3 4 +") {
t.Error("'help +' should have example '3 4 +'")
}
}
func TestGetHelpOperatorWithAliases(t *testing.T) {
// Test by alias
output := GetHelp("gt")
if !strings.Contains(output, ">") {
t.Errorf("'help gt' should show > operator, got: %s", output[:80])
}
if !strings.Contains(output, "Aliases:") {
t.Error("'help gt' should show aliases")
}
}
func TestGetHelpHyperOperator(t *testing.T) {
output := GetHelp("[+]")
if !strings.Contains(output, "Add all stack values") {
t.Errorf("'help [+]' should describe hyper add, got: %s", output[:80])
}
if !strings.Contains(output, "Hyper") {
t.Error("'help [+]' should be in Hyper category")
}
}
func TestGetHelpVariableOperator(t *testing.T) {
output := GetHelp(":=")
if !strings.Contains(output, "Assign") {
t.Errorf("'help :=' should describe assignment, got: %s", output[:80])
}
if !strings.Contains(output, "Variables") {
t.Error("'help :=' should be in Variables category")
}
}
func TestGetHelpUnknownTopic(t *testing.T) {
output := GetHelp("nonexistent")
if !strings.Contains(output, "No help for") {
t.Errorf("'help nonexistent' should say no help, got: %s", output)
}
if !strings.Contains(output, "help categories") {
t.Error("'help nonexistent' should suggest 'help categories'")
}
}
func TestGetHelpCaseInsensitive(t *testing.T) {
output := GetHelp("lg")
outputUpper := GetHelp("LG")
if output != outputUpper {
t.Error("Help should handle case consistently for lg/LG")
}
}
func TestGetAllTopics(t *testing.T) {
topics := GetAllTopics()
if len(topics) == 0 {
t.Error("GetAllTopics() should return topics")
}
// Check known topics are present
expectedTopics := []string{"+", "-", "*", "/", "dup", "swap", "help", "rat", "[+]"}
for _, expected := range expectedTopics {
found := false
for _, t := range topics {
if t == expected {
found = true
break
}
}
if !found {
t.Errorf("GetAllTopics() missing topic %q", expected)
}
}
}
func TestGetCompletionTopicsIncludesAliases(t *testing.T) {
topics := GetCompletionTopics()
// Should include aliases
expectedAliases := []string{"exit", "calc", "gt", "lt", "categories"}
for _, expected := range expectedAliases {
found := false
for _, topic := range topics {
if topic == expected {
found = true
break
}
}
if !found {
t.Errorf("GetCompletionTopics() missing alias/topic %q", expected)
}
}
// "help" itself should NOT be in completion topics
for _, topic := range topics {
if topic == "help" {
t.Error("GetCompletionTopics() should not include 'help' itself")
}
}
}
func TestGetCompletionTopicsIsSorted(t *testing.T) {
topics := GetCompletionTopics()
for i := 1; i < len(topics); i++ {
if topics[i] < topics[i-1] {
t.Errorf("Topics not sorted: %q > %q at index %d", topics[i-1], topics[i], i)
}
}
}
func TestFormatTopic(t *testing.T) {
topic := helpByTopic["+"]
if topic == nil {
t.Fatal("helpByTopic[\"+\"] is nil")
}
output := formatTopic(topic)
if !strings.Contains(output, "Topic:") {
t.Error("formatTopic should contain 'Topic:'")
}
if !strings.Contains(output, "Usage:") {
t.Error("formatTopic should contain 'Usage:'")
}
if !strings.Contains(output, "Desc:") {
t.Error("formatTopic should contain 'Desc:'")
}
if !strings.Contains(output, "Examples:") {
t.Error("formatTopic should contain 'Examples:'")
}
}
func TestHelpTopicsNoDuplicates(t *testing.T) {
// Operators can appear in multiple categories (e.g. "clear" in REPL and Variables)
// Check for true duplicates: same operator within the same category
seen := make(map[string]map[string]bool) // category -> operators
for _, topic := range helpTopics {
if seen[topic.Category] == nil {
seen[topic.Category] = make(map[string]bool)
}
if seen[topic.Category][topic.Operator] {
t.Errorf("Duplicate topic operator %q in category %q", topic.Operator, topic.Category)
}
seen[topic.Category][topic.Operator] = true
}
}
func TestHelpByAliasResolution(t *testing.T) {
// Test that aliases resolve to the correct topic
output := GetHelp("exit")
if !strings.Contains(output, "Exit") {
t.Errorf("'help exit' should describe exit, got: %s", output[:80])
}
output = GetHelp("calc")
if !strings.Contains(output, "RPN") {
t.Errorf("'help calc' should describe RPN, got: %s", output[:80])
}
output = GetHelp("showstack")
if !strings.Contains(output, "stack") {
t.Errorf("'help showstack' should mention stack, got: %s", output[:80])
}
}
func TestHelpCompleterIntegration(t *testing.T) {
adapter := NewAutoCompleter()
if adapter == nil {
t.Fatal("NewAutoCompleter returned nil")
}
// "help " (with trailing space) should offer help topics, not "help help"
matches, _ := adapter.Do([]rune("help "), 5)
for _, m := range matches {
if string(m) == "help" {
t.Error("'help ' should not complete to 'help help'")
}
}
// Should include a known topic
foundPlus := false
for _, m := range matches {
if string(m) == "+" {
foundPlus = true
}
}
if !foundPlus {
t.Errorf("'help ' should suggest '+', got: %v", matches)
}
// Test help topic completion
matches, _ = adapter.Do([]rune("help +"), 6)
if len(matches) != 1 {
t.Errorf("'help +' should match +, got %d matches: %v", len(matches), matches)
}
// Test partial help topic completion
matches, _ = adapter.Do([]rune("help du"), 7)
if len(matches) != 1 {
t.Errorf("'help du' should match dup, got %d matches: %v", len(matches), matches)
}
}
func TestCmdHelpIntegration(t *testing.T) {
// cmdHelp should delegate to GetHelp
output := cmdHelp(nil)
if !strings.Contains(output, "gt") {
t.Error("cmdHelp(nil) should return general help")
}
output = cmdHelp([]string{"+"})
if !strings.Contains(output, "Add") {
t.Errorf("cmdHelp(['+']) should return + help, got: %s", output[:80])
}
output = cmdHelp([]string{"categories"})
if !strings.Contains(output, "REPL") {
t.Error("cmdHelp(['categories']) should list categories")
}
}
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