test: improve coverage for readline.Interface

Add tests in parallel/test-readline-interface to increase coverage
PR-URL: #20704
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: Masashi Hirano

test/parallel/test-readline-interface.js

@@ -613,6 +613,43 @@ function isWarned(emitter) {
 rli.close();
 }
 
+{
+// Back and Forward one character
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+fi.emit('data','the quick brown fox');
+letcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,19);
+
+// Back one character
+fi.emit('keypress','.',{ctrl: true,name: 'b'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,18);
+// Back one character
+fi.emit('keypress','.',{ctrl: true,name: 'b'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,17);
+// Forward one character
+fi.emit('keypress','.',{ctrl: true,name: 'f'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,18);
+// Forward one character
+fi.emit('keypress','.',{ctrl: true,name: 'f'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,19);
+rli.close();
+}
+
 {
 // `wordLeft` and `wordRight`
 constfi=newFakeInput();
@@ -728,6 +765,117 @@ function isWarned(emitter) {
 });
 }
 
+// deleteLeft
+{
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+fi.emit('data','the quick brown fox');
+letcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,19);
+
+// Delete left character
+fi.emit('keypress','.',{ctrl: true,name: 'h'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,18);
+rli.on('line',common.mustCall((line)=>{
+assert.strictEqual(line,'the quick brown fo');
+}));
+fi.emit('data','\n');
+rli.close();
+}
+
+// deleteRight
+{
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+fi.emit('data','the quick brown fox');
+
+// Go to the start of the line
+fi.emit('keypress','.',{ctrl: true,name: 'a'});
+letcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,0);
+
+// Delete right character
+fi.emit('keypress','.',{ctrl: true,name: 'd'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,0);
+rli.on('line',common.mustCall((line)=>{
+assert.strictEqual(line,'he quick brown fox');
+}));
+fi.emit('data','\n');
+rli.close();
+}
+
+
+// deleteLineLeft
+{
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+fi.emit('data','the quick brown fox');
+letcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,19);
+
+// Delete from current to start of line
+fi.emit('keypress','.',{ctrl: true,shift: true,name: 'backspace'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,0);
+rli.on('line',common.mustCall((line)=>{
+assert.strictEqual(line,'');
+}));
+fi.emit('data','\n');
+rli.close();
+}
+
+// deleteLineRight
+{
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+fi.emit('data','the quick brown fox');
+
+// Go to the start of the line
+fi.emit('keypress','.',{ctrl: true,name: 'a'});
+letcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,0);
+
+// Delete from current to end of line
+fi.emit('keypress','.',{ctrl: true,shift: true,name: 'delete'});
+cursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,0);
+rli.on('line',common.mustCall((line)=>{
+assert.strictEqual(line,'');
+}));
+fi.emit('data','\n');
+rli.close();
+}
+
 // multi-line cursor position
 {
 constfi=newFakeInput();
@@ -742,6 +890,29 @@ function isWarned(emitter) {
 constcursorPos=rli._getCursorPos();
 assert.strictEqual(cursorPos.rows,1);
 assert.strictEqual(cursorPos.cols,5);
+rli.close();
+}
+
+// Clear the whole screen
+{
+constfi=newFakeInput();
+constrli=newreadline.Interface({
+input: fi,
+output: fi,
+prompt: '',
+terminal: terminal
+});
+constlines=['line 1','line 2','line 3'];
+fi.emit('data',lines.join('\n'));
+fi.emit('keypress','.',{ctrl: true,name: 'l'});
+constcursorPos=rli._getCursorPos();
+assert.strictEqual(cursorPos.rows,0);
+assert.strictEqual(cursorPos.cols,6);
+rli.on('line',common.mustCall((line)=>{
+assert.strictEqual(line,'line 3');
+}));
+fi.emit('data','\n');
+rli.close();
 }
 }