1 files changed, 61 insertions, 0 deletions
diff --git a/devtools/client/shared/sourceeditor/test/browser_editor_movelines.js b/devtools/client/shared/sourceeditor/test/browser_editor_movelines.js
new file mode 100644
index 0000000000..b95139b5a9
--- /dev/null
+++ b/devtools/client/shared/sourceeditor/test/browser_editor_movelines.js
@@ -0,0 +1,61 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function test() {
+  waitForExplicitFinish();
+  const { ed, win } = await setup();
+  const simpleProg =
+    "function foo() {\n  let i = 1;\n  let j = 2;\n  " + "return bar;\n}";
+  ed.setText(simpleProg);
+
+  // Move first line up
+  ed.setCursor({ line: 0, ch: 0 });
+  ed.moveLineUp();
+  is(ed.getText(0), "function foo() {", "getText(num)");
+  ch(ed.getCursor(), { line: 0, ch: 0 }, "getCursor");
+
+  // Move last line down
+  ed.setCursor({ line: 4, ch: 0 });
+  ed.moveLineDown();
+  is(ed.getText(4), "}", "getText(num)");
+  ch(ed.getCursor(), { line: 4, ch: 0 }, "getCursor");
+
+  // Move line 2 up
+  ed.setCursor({ line: 1, ch: 5 });
+  ed.moveLineUp();
+  is(ed.getText(0), "  let i = 1;", "getText(num)");
+  is(ed.getText(1), "function foo() {", "getText(num)");
+  ch(ed.getCursor(), { line: 0, ch: 5 }, "getCursor");
+
+  // Undo previous move by moving line 1 down
+  ed.moveLineDown();
+  is(ed.getText(0), "function foo() {", "getText(num)");
+  is(ed.getText(1), "  let i = 1;", "getText(num)");
+  ch(ed.getCursor(), { line: 1, ch: 5 }, "getCursor");
+
+  // Move line 2 and 3 up
+  ed.setSelection({ line: 1, ch: 0 }, { line: 2, ch: 0 });
+  ed.moveLineUp();
+  is(ed.getText(0), "  let i = 1;", "getText(num)");
+  is(ed.getText(1), "  let j = 2;", "getText(num)");
+  is(ed.getText(2), "function foo() {", "getText(num)");
+  ch(ed.getCursor("start"), { line: 0, ch: 0 }, "getCursor(string)");
+  ch(ed.getCursor("end"), { line: 1, ch: 0 }, "getCursor(string)");
+
+  // Move line 1 to 3 down twice
+  ed.dropSelection();
+  ed.setSelection({ line: 0, ch: 7 }, { line: 2, ch: 5 });
+  ed.moveLineDown();
+  ed.moveLineDown();
+  is(ed.getText(0), "  return bar;", "getText(num)");
+  is(ed.getText(1), "}", "getText(num)");
+  is(ed.getText(2), "  let i = 1;", "getText(num)");
+  is(ed.getText(3), "  let j = 2;", "getText(num)");
+  is(ed.getText(4), "function foo() {", "getText(num)");
+  ch(ed.getCursor("start"), { line: 2, ch: 7 }, "getCursor(string)");
+  ch(ed.getCursor("end"), { line: 4, ch: 5 }, "getCursor(string)");
+
+  teardown(ed, win);
+}