Add local selection update

frontend/obsidian-plugin/src/views/cursors/update-selection.test.ts

@@ -0,0 +1,111 @@
+import { updateSelection } from "./update-selection";
+
+describe("Selection update", () => {
+	it("should handle span fully before - insert", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 0,
+			toA: 0,
+			fromB: 0,
+			toB: 2,
+			spans
+		});
+		expect(spans).toEqual([{ start: 5, end: 7 }]);
+	});
+
+	it("should handle span fully before - delete", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 0,
+			toA: 2,
+			fromB: 0,
+			toB: 0,
+			spans
+		});
+		expect(spans).toEqual([{ start: 1, end: 3 }]);
+	});
+
+	it("should handle span fully after - insert", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 6,
+			toA: 6,
+			fromB: 6,
+			toB: 10,
+			spans
+		});
+		expect(spans).toEqual([{ start: 3, end: 5 }]);
+	});
+
+	it("should handle span fully after - delete", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 6,
+			toA: 10,
+			fromB: 6,
+			toB: 6,
+			spans
+		});
+		expect(spans).toEqual([{ start: 3, end: 5 }]);
+	});
+
+	it("should handle span fully within - insert", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 4,
+			toA: 4,
+			fromB: 4,
+			toB: 6,
+			spans
+		});
+		expect(spans).toEqual([{ start: 3, end: 7 }]);
+	});
+
+	it("should handle span fully within - delete", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 4,
+			toA: 5,
+			fromB: 4,
+			toB: 4,
+			spans
+		});
+		expect(spans).toEqual([{ start: 3, end: 4 }]);
+	});
+
+	it("should handle span overlapping with start", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 2,
+			toA: 4,
+			fromB: 2,
+			toB: 2,
+			spans
+		});
+		expect(spans).toEqual([{ start: 2, end: 4 }]);
+	});
+
+	it("should handle span overlapping with end", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 4,
+			toA: 6,
+			fromB: 4,
+			toB: 4,
+			spans
+		});
+		expect(spans).toEqual([{ start: 3, end: 4 }]);
+	});
+
+	it("delete entire selection", () => {
+		const spans = [{ start: 3, end: 5 }];
+		updateSelection({
+			fromA: 0,
+			toA: 10,
+			fromB: 0,
+			toB: 0,
+			spans
+		});
+		expect(spans).toEqual([{ start: 0, end: 0 }]);
+	});
+});