1 files changed, 39 insertions, 0 deletions
diff --git a/packages/excalidraw/tests/clients.test.ts b/packages/excalidraw/tests/clients.test.ts
new file mode 100644
index 0000000..e78cf18
--- /dev/null
+++ b/packages/excalidraw/tests/clients.test.ts
@@ -0,0 +1,39 @@
+import { getNameInitial } from "../clients";
+
+describe("getClientInitials", () => {
+  it("returns substring if one name provided", () => {
+    expect(getNameInitial("Alan")).toBe("A");
+  });
+
+  it("returns initials", () => {
+    expect(getNameInitial("John Doe")).toBe("J");
+  });
+
+  it("returns correct initials if many names provided", () => {
+    expect(getNameInitial("John Alan Doe")).toBe("J");
+  });
+
+  it("returns single initial if 1 letter provided", () => {
+    expect(getNameInitial("z")).toBe("Z");
+  });
+
+  it("trims trailing whitespace", () => {
+    expect(getNameInitial("  q    ")).toBe("Q");
+  });
+
+  it('returns "?" if falsey value provided', () => {
+    expect(getNameInitial("")).toBe("?");
+    expect(getNameInitial(undefined)).toBe("?");
+    expect(getNameInitial(null)).toBe("?");
+  });
+
+  it('returns "?" when value is blank', () => {
+    expect(getNameInitial(" ")).toBe("?");
+  });
+
+  it("works with multibyte strings", () => {
+    expect(getNameInitial("😀")).toBe("😀");
+    // but doesn't work with emoji ZWJ sequences
+    expect(getNameInitial("👨‍👩‍👦")).toBe("👨");
+  });
+});