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package editor
import (
"strings"
"testing"
"github.com/gdamore/tcell/v2"
"rickub.com/turbo-editors/turbo-core/buffer"
)
func TestArrowKeysMoveTheCursor(t *testing.T) {
view, _, _ := newTestView(t, "abc\ndef", 40, 6)
view.HandleKey(key(tcell.KeyRight, tcell.ModNone))
view.HandleKey(key(tcell.KeyDown, tcell.ModNone))
if got := view.Buffer().Cursor(); got != (buffer.Position{Line: 1, Col: 1}) {
t.Errorf("Cursor() = %+v, want {Line:1 Col:1}", got)
}
}
func TestCtrlArrowsMoveByWord(t *testing.T) {
view, _, _ := newTestView(t, "alpha beta gamma", 40, 6)
view.HandleKey(key(tcell.KeyRight, tcell.ModCtrl))
if got := view.Buffer().Cursor().Col; got != 6 {
t.Errorf("Cursor().Col = %d, want the start of the second word", got)
}
}
func TestHomeAndEnd(t *testing.T) {
view, _, _ := newTestView(t, "abc\ndefgh", 40, 6)
view.Buffer().SetCursor(buffer.Position{Line: 1, Col: 2})
view.HandleKey(key(tcell.KeyEnd, tcell.ModNone))
if got := view.Buffer().Cursor().Col; got != 5 {
t.Errorf("End left the cursor at column %d, want 5", got)
}
view.HandleKey(key(tcell.KeyHome, tcell.ModNone))
if got := view.Buffer().Cursor().Col; got != 0 {
t.Errorf("Home left the cursor at column %d, want 0", got)
}
view.HandleKey(key(tcell.KeyHome, tcell.ModCtrl))
if got := view.Buffer().Cursor(); got != (buffer.Position{}) {
t.Errorf("Ctrl-Home left the cursor at %+v, want the start of the buffer", got)
}
view.HandleKey(key(tcell.KeyEnd, tcell.ModCtrl))
if got := view.Buffer().Cursor(); got != (buffer.Position{Line: 1, Col: 5}) {
t.Errorf("Ctrl-End left the cursor at %+v, want the end of the buffer", got)
}
}
func TestPageKeysMoveByAScreenful(t *testing.T) {
view, _, _ := newTestView(t, strings.Repeat("line\n", 100), 40, 12)
page := view.VisibleLines()
view.HandleKey(key(tcell.KeyPgDn, tcell.ModNone))
if got := view.Buffer().Cursor().Line; got != page {
t.Errorf("Cursor().Line = %d, want %d", got, page)
}
view.HandleKey(key(tcell.KeyPgUp, tcell.ModNone))
if got := view.Buffer().Cursor().Line; got != 0 {
t.Errorf("Cursor().Line = %d, want 0", got)
}
}
func TestShiftArrowsExtendTheSelection(t *testing.T) {
view, _, _ := newTestView(t, "hello world", 40, 6)
for range 5 {
view.HandleKey(key(tcell.KeyRight, tcell.ModShift))
}
if got := view.SelectedText(); got != "hello" {
t.Errorf("SelectedText() = %q, want %q", got, "hello")
}
}
func TestAPlainArrowDropsTheSelection(t *testing.T) {
view, _, _ := newTestView(t, "hello world", 40, 6)
view.HandleKey(key(tcell.KeyRight, tcell.ModShift))
view.HandleKey(key(tcell.KeyRight, tcell.ModNone))
if got := view.SelectedText(); got != "" {
t.Errorf("SelectedText() = %q, want the selection dropped", got)
}
}
func TestTypingInsertsCharacters(t *testing.T) {
view, _, _ := newTestView(t, "", 40, 6)
changes := 0
view.OnChange = func() { changes++ }
for _, r := range "func" {
view.HandleKey(typed(r))
}
if got := view.Buffer().Text(); got != "func" {
t.Errorf("Text() = %q, want %q", got, "func")
}
if changes != 4 {
t.Errorf("OnChange was called %d times, want 4", changes)
}
}
func TestCtrlAndAltLettersAreNotTyped(t *testing.T) {
view, _, _ := newTestView(t, "", 40, 6)
view.HandleKey(tcell.NewEventKey(tcell.KeyRune, 'x', tcell.ModAlt))
if got := view.Buffer().Text(); got != "" {
t.Errorf("Text() = %q, want a modified key not to have been typed", got)
}
}
func TestEnterInsertsALineAndKeepsTheIndent(t *testing.T) {
view, _, _ := newTestView(t, "\tfoo()", 40, 6)
view.Buffer().MoveLineEnd()
view.HandleKey(key(tcell.KeyEnter, tcell.ModNone))
if got := view.Buffer().Line(1); got != "\t" {
t.Errorf("Line(1) = %q, want the indent carried over", got)
}
}
func TestBackspaceAndDelete(t *testing.T) {
view, _, _ := newTestView(t, "abcd", 40, 6)
view.Buffer().SetCursor(buffer.Position{Line: 0, Col: 2})
view.HandleKey(key(tcell.KeyBackspace2, tcell.ModNone))
view.HandleKey(key(tcell.KeyDelete, tcell.ModNone))
if got := view.Buffer().Text(); got != "ad" {
t.Errorf("Text() = %q, want %q", got, "ad")
}
}
func TestTabInsertsATabWhenNothingIsSelected(t *testing.T) {
view, _, _ := newTestView(t, "x", 40, 6)
view.HandleKey(key(tcell.KeyTab, tcell.ModNone))
if got := view.Buffer().Text(); got != "\tx" {
t.Errorf("Text() = %q, want a tab inserted", got)
}
}
func TestTabIndentsEveryLineOfTheSelection(t *testing.T) {
view, _, _ := newTestView(t, "one\ntwo\nthree", 40, 6)
view.Buffer().SetCursor(buffer.Position{Line: 0, Col: 1})
view.Buffer().StartSelection()
view.Buffer().SetCursorKeepingSelection(buffer.Position{Line: 1, Col: 1})
view.HandleKey(key(tcell.KeyTab, tcell.ModNone))
if got := view.Buffer().Text(); got != "\tone\n\ttwo\nthree" {
t.Errorf("Text() = %q, want the first two lines indented", got)
}
}
func TestShiftTabRemovesOneIndentLevel(t *testing.T) {
tests := []struct {
name string
give string
want string
}{
{"a tab", "\tx", "x"},
{"eight spaces", " x", "x"},
{"three spaces", " x", "x"},
{"nothing to remove", "x", "x"},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
view, _, _ := newTestView(t, tc.give, 40, 6)
view.HandleKey(key(tcell.KeyBacktab, tcell.ModNone))
if got := view.Buffer().Text(); got != tc.want {
t.Errorf("Text() = %q, want %q", got, tc.want)
}
})
}
}
func TestCutCopyAndPaste(t *testing.T) {
clipboard := &Clipboard{}
view, _, _ := newTestView(t, "hello world", 40, 6)
view.clipboard = clipboard
view.Buffer().SetCursor(buffer.Position{Line: 0, Col: 0})
view.Buffer().StartSelection()
view.Buffer().SetCursorKeepingSelection(buffer.Position{Line: 0, Col: 6})
view.HandleKey(key(tcell.KeyCtrlX, tcell.ModNone))
if got := view.Buffer().Text(); got != "world" {
t.Fatalf("Text() = %q after a cut, want %q", got, "world")
}
if got := clipboard.Text(); got != "hello " {
t.Errorf("the clipboard holds %q, want %q", got, "hello ")
}
view.Buffer().MoveBufferEnd()
view.HandleKey(key(tcell.KeyCtrlV, tcell.ModNone))
if got := view.Buffer().Text(); got != "worldhello " {
t.Errorf("Text() = %q after a paste, want %q", got, "worldhello ")
}
}
func TestTheTurboCClipboardKeysWorkToo(t *testing.T) {
clipboard := &Clipboard{}
view, _, _ := newTestView(t, "abc", 40, 6)
view.clipboard = clipboard
view.SelectAll()
view.HandleKey(key(tcell.KeyInsert, tcell.ModCtrl)) // Ctrl-Ins copies
if got := clipboard.Text(); got != "abc" {
t.Errorf("the clipboard holds %q, want %q", got, "abc")
}
view.Buffer().MoveBufferEnd()
view.HandleKey(key(tcell.KeyInsert, tcell.ModShift)) // Shift-Ins pastes
if got := view.Buffer().Text(); got != "abcabc" {
t.Errorf("Text() = %q, want %q", got, "abcabc")
}
view.SelectAll()
view.HandleKey(key(tcell.KeyDelete, tcell.ModShift)) // Shift-Del cuts
if got := view.Buffer().Text(); got != "" {
t.Errorf("Text() = %q, want it emptied by the cut", got)
}
}
func TestCopyingNothingDoesNotTouchTheClipboard(t *testing.T) {
clipboard := &Clipboard{}
clipboard.SetText("kept")
view, _, _ := newTestView(t, "abc", 40, 6)
view.clipboard = clipboard
if view.Copy() || view.Cut() {
t.Error("Copy or Cut reported success with nothing selected")
}
if got := clipboard.Text(); got != "kept" {
t.Errorf("the clipboard holds %q, want it untouched", got)
}
}
func TestPastingAnEmptyClipboardDoesNothing(t *testing.T) {
view, _, _ := newTestView(t, "abc", 40, 6)
if view.Paste() {
t.Error("Paste reported success with an empty clipboard")
}
if got := view.Buffer().Text(); got != "abc" {
t.Errorf("Text() = %q, want it unchanged", got)
}
}
func TestUndoAndRedoKeys(t *testing.T) {
view, _, _ := newTestView(t, "abc", 40, 6)
view.Buffer().MoveBufferEnd()
view.HandleKey(typed('d'))
view.HandleKey(key(tcell.KeyCtrlZ, tcell.ModNone))
if got := view.Buffer().Text(); got != "abc" {
t.Errorf("Text() = %q after undo, want %q", got, "abc")
}
// Ctrl-R, not Ctrl-Y: Ctrl-Y is Turbo C's delete-line, and that claim won.
view.HandleKey(key(tcell.KeyCtrlR, tcell.ModNone))
if got := view.Buffer().Text(); got != "abcd" {
t.Errorf("Text() = %q after redo, want %q", got, "abcd")
}
}
func TestCtrlYNoLongerRedoes(t *testing.T) {
// The half of the change that a user notices: the old key must not
// quietly keep working, or nobody learns the new one until it bites.
view, _, _ := newTestView(t, "abc", 40, 6)
view.Buffer().MoveBufferEnd()
view.HandleKey(typed('d'))
view.HandleKey(key(tcell.KeyCtrlZ, tcell.ModNone))
view.HandleKey(key(tcell.KeyCtrlY, tcell.ModNone))
if got := view.Buffer().Text(); got == "abcd" {
t.Error("Ctrl-Y redid the change; it deletes a line now")
}
}
func TestCtrlNInsertsALineAndCtrlYDeletesOne(t *testing.T) {
view, _, _ := newTestView(t, "one\ntwo\nthree\n", 40, 6)
view.Buffer().SetCursor(buffer.Position{Line: 1, Col: 1})
view.HandleKey(key(tcell.KeyCtrlN, tcell.ModNone))
if got := view.Buffer().Text(); got != "one\n\ntwo\nthree\n" {
t.Fatalf("after Ctrl-N Text() = %q", got)
}
view.HandleKey(key(tcell.KeyCtrlY, tcell.ModNone))
if got := view.Buffer().Text(); got != "one\n\nthree\n" {
t.Errorf("after Ctrl-Y Text() = %q, want the line the cursor was on gone", got)
}
}
func TestCtrlASelectsEverything(t *testing.T) {
view, _, _ := newTestView(t, "one\ntwo", 40, 6)
view.HandleKey(key(tcell.KeyCtrlA, tcell.ModNone))
if got := view.SelectedText(); got != "one\ntwo" {
t.Errorf("SelectedText() = %q, want the whole buffer", got)
}
}
func TestCtrlSpaceAsksForCompletion(t *testing.T) {
view, _, _ := newTestView(t, "fmt.", 40, 6)
asked := 0
view.OnCompletionRequest = func() { asked++ }
view.HandleKey(key(tcell.KeyCtrlSpace, tcell.ModNone))
if asked != 1 {
t.Errorf("completion was asked for %d times, want 1", asked)
}
}
func TestTypingADotAsksForCompletion(t *testing.T) {
view, _, _ := newTestView(t, "fmt", 40, 6)
view.Buffer().MoveBufferEnd()
asked := 0
view.OnCompletionRequest = func() { asked++ }
view.HandleKey(typed('.'))
view.HandleKey(typed('P'))
if asked != 1 {
t.Errorf("completion was asked for %d times, want 1 — only the dot triggers it", asked)
}
}
func TestAKeyTheViewHasNoUseForIsPassedOn(t *testing.T) {
view, _, _ := newTestView(t, "abc", 40, 6)
if view.HandleKey(key(tcell.KeyF9, tcell.ModNone)) {
t.Error("the view claimed a function key it does nothing with")
}
}
func TestWordBeforeCursor(t *testing.T) {
tests := []struct {
name string
text string
col int
want string
}{
{"mid-identifier", "fmt.Print", 9, "Print"},
{"just after a dot", "fmt.", 4, ""},
{"at the start of a line", "abc", 0, ""},
{"a whole word", "hello", 5, "hello"},
{"with digits and underscores", "a_1b", 4, "a_1b"},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
view, _, _ := newTestView(t, tc.text, 40, 6)
view.Buffer().SetCursor(buffer.Position{Line: 0, Col: tc.col})
if got := view.WordBeforeCursor(); got != tc.want {
t.Errorf("WordBeforeCursor() = %q, want %q", got, tc.want)
}
})
}
}
func TestReplaceWordBeforeCursorAcceptsACompletion(t *testing.T) {
view, _, _ := newTestView(t, "fmt.Prin", 40, 6)
view.Buffer().MoveBufferEnd()
view.ReplaceWordBeforeCursor("Println")
if got := view.Buffer().Text(); got != "fmt.Println" {
t.Errorf("Text() = %q, want %q", got, "fmt.Println")
}
}
func TestGoToLine(t *testing.T) {
view, _, _ := newTestView(t, strings.Repeat("x\n", 50), 40, 8)
view.GoToLine(30)
if got := view.Buffer().Cursor().Line; got != 29 {
t.Errorf("Cursor().Line = %d, want 29 — GoToLine counts from one", got)
}
if top := view.TopLine(); 29 < top || 29 >= top+view.VisibleLines() {
t.Error("the view did not scroll to the requested line")
}
}
func TestClickingPlacesTheCursor(t *testing.T) {
view, _, _ := newTestView(t, "package main\nfunc main() {}", 40, 8)
gutter := view.gutterWidth()
view.HandleMouse(tcell.NewEventMouse(gutter+4, 1, tcell.Button1, tcell.ModNone))
if got := view.Buffer().Cursor(); got != (buffer.Position{Line: 1, Col: 4}) {
t.Errorf("Cursor() = %+v, want {Line:1 Col:4}", got)
}
}
func TestDraggingSelects(t *testing.T) {
view, _, _ := newTestView(t, "hello world", 40, 8)
gutter := view.gutterWidth()
view.HandleMouse(tcell.NewEventMouse(gutter, 0, tcell.Button1, tcell.ModNone))
view.HandleMouse(tcell.NewEventMouse(gutter+5, 0, tcell.Button1, tcell.ModNone))
if got := view.SelectedText(); got != "hello" {
t.Errorf("SelectedText() = %q, want %q", got, "hello")
}
view.HandleMouse(tcell.NewEventMouse(gutter+5, 0, tcell.ButtonNone, tcell.ModNone))
if view.selecting {
t.Error("the drag did not end when the button came back up")
}
}
func TestTheWheelScrolls(t *testing.T) {
view, _, _ := newTestView(t, strings.Repeat("line\n", 100), 40, 10)
view.HandleMouse(tcell.NewEventMouse(5, 5, tcell.WheelDown, tcell.ModNone))
if got := view.TopLine(); got != wheelStep {
t.Errorf("TopLine() = %d, want %d", got, wheelStep)
}
view.HandleMouse(tcell.NewEventMouse(5, 5, tcell.WheelUp, tcell.ModNone))
if got := view.TopLine(); got != 0 {
t.Errorf("TopLine() = %d, want 0", got)
}
}
func TestAMouseEventTheViewHasNoUseForIsPassedOn(t *testing.T) {
view, _, _ := newTestView(t, "abc", 40, 6)
if view.HandleMouse(tcell.NewEventMouse(1, 1, tcell.Button3, tcell.ModNone)) {
t.Error("the view claimed a middle-button event it does nothing with")
}
}
func TestTheCursorIsReportedWhenItMoves(t *testing.T) {
view, _, _ := newTestView(t, "abc", 40, 6)
moves := 0
view.OnCursorMove = func() { moves++ }
view.HandleKey(key(tcell.KeyRight, tcell.ModNone))
view.HandleKey(typed('x')) // an edit moves the cursor too
if moves != 2 {
t.Errorf("OnCursorMove was called %d times, want 2", moves)
}
}
|