Add SelectionModel tests

src/SelectionModel.test.ts

@@ -0,0 +1,133 @@
+/**
+ * @license MIT
+ */
+import { assert } from 'chai';
+import { ITerminal } from './Interfaces';
+import { SelectionModel } from './SelectionModel';
+
+class TestSelectionModel extends SelectionModel {
+  constructor(
+    terminal: ITerminal
+  ) {
+    super(terminal);
+  }
+
+  public areSelectionValuesReversed(): boolean { return this._areSelectionValuesReversed(); }
+}
+
+describe('SelectionManager', () => {
+  let window: Window;
+  let document: Document;
+
+  let terminal: ITerminal;
+  let model: TestSelectionModel;
+
+  beforeEach(() => {
+    terminal = <any>{ cols: 80, rows: 2, ybase: 0 };
+    model = new TestSelectionModel(terminal);
+  });
+
+  describe('clearSelection', () => {
+    it('should clear the final selection', () => {
+      model.selectionStart = [0, 0];
+      model.selectionEnd = [10, 2];
+      assert.deepEqual(model.finalSelectionStart, [0, 0]);
+      assert.deepEqual(model.finalSelectionEnd, [10, 2]);
+      model.clearSelection();
+      assert.deepEqual(model.finalSelectionStart, null);
+      assert.deepEqual(model.finalSelectionEnd, null);
+    });
+  });
+
+  describe('_areSelectionValuesReversed', () => {
+    it('should return true when the selection end is before selection start', () => {
+      model.selectionStart = [1, 0];
+      model.selectionEnd = [0, 0];
+      assert.equal(model.areSelectionValuesReversed(), true);
+      model.selectionStart = [10, 2];
+      model.selectionEnd = [0, 0];
+      assert.equal(model.areSelectionValuesReversed(), true);
+    });
+    it('should return false when the selection end is after selection start', () => {
+      model.selectionStart = [0, 0];
+      model.selectionEnd = [1, 0];
+      assert.equal(model.areSelectionValuesReversed(), false);
+      model.selectionStart = [0, 0];
+      model.selectionEnd = [10, 2];
+      assert.equal(model.areSelectionValuesReversed(), false);
+    });
+  });
+
+  describe('onTrim', () => {
+    it('should trim a portion of the selection when a part of it is trimmed', () => {
+      model.selectionStart = [0, 0];
+      model.selectionEnd = [10, 2];
+      model.onTrim(1);
+      assert.deepEqual(model.finalSelectionStart, [0, 0]);
+      assert.deepEqual(model.finalSelectionEnd, [10, 1]);
+      model.onTrim(1);
+      assert.deepEqual(model.finalSelectionStart, [0, 0]);
+      assert.deepEqual(model.finalSelectionEnd, [10, 0]);
+    });
+    it('should clear selection when it is trimmed in its entirety', () => {
+      model.selectionStart = [0, 0];
+      model.selectionEnd = [10, 0];
+      model.onTrim(1);
+      assert.deepEqual(model.finalSelectionStart, null);
+      assert.deepEqual(model.finalSelectionEnd, null);
+    });
+  });
+
+  describe('finalSelectionStart', () => {
+    it('should return the start of the buffer if select all is active', () => {
+      model.isSelectAllActive = true;
+      assert.deepEqual(model.finalSelectionStart, [0, 0]);
+    });
+    it('should return selection start if there is no selection end', () => {
+      model.selectionStart = [2, 2];
+      assert.deepEqual(model.finalSelectionStart, [2, 2]);
+    });
+    it('should return selection end if values are reversed', () => {
+      model.selectionStart = [2, 2];
+      model.selectionEnd = [3, 2];
+      assert.deepEqual(model.finalSelectionStart, [2, 2]);
+      model.selectionEnd = [1, 2];
+      assert.deepEqual(model.finalSelectionStart, [1, 2]);
+    });
+  });
+
+  describe('finalSelectionEnd', () => {
+    it('should return the end of the buffer if select all is active', () => {
+      model.isSelectAllActive = true;
+      assert.deepEqual(model.finalSelectionEnd, [79, 1]);
+    });
+    it('should return null if there is no selection start', () => {
+      assert.equal(model.finalSelectionEnd, null);
+      model.selectionEnd = [1, 2];
+      assert.equal(model.finalSelectionEnd, null);
+    });
+    it('should return selection start + length if there is no selection end', () => {
+      model.selectionStart = [2, 2];
+      model.selectionStartLength = 2;
+      assert.deepEqual(model.finalSelectionEnd, [4, 2]);
+    });
+    it('should return selection start + length if values are reversed', () => {
+      model.selectionStart = [2, 2];
+      model.selectionStartLength = 2;
+      model.selectionEnd = [2, 1];
+      assert.deepEqual(model.finalSelectionEnd, [4, 2]);
+    });
+    it('should return selection start + length if selection end is inside the start selection', () => {
+      model.selectionStart = [2, 2];
+      model.selectionStartLength = 2;
+      model.selectionEnd = [3, 2];
+      assert.deepEqual(model.finalSelectionEnd, [4, 2]);
+    });
+    it('should return selection end if selection end is after selection start + length', () => {
+      model.selectionStart = [2, 2];
+      model.selectionStartLength = 2;
+      model.selectionEnd = [5, 2];
+      assert.deepEqual(model.finalSelectionEnd, [5, 2]);
+    });
+  });
+});