Pangram

typescript/pangram/pangram.test.ts

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+import { isPangram } from "./pangram";
+
+describe("Pangram()", () => {
+  it("empty sentence", () => {
+    expect(isPangram("")).toBe(false);
+  });
+
+  it("perfect lower case", () => {
+    expect(isPangram("abcdefghijklmnopqrstuvwxyz")).toBe(true);
+  });
+
+  it("only lower case", () => {
+    expect(isPangram("the quick brown fox jumps over the lazy dog")).toBe(true);
+  });
+
+  it("missing the letter 'x'", () => {
+    expect(
+      isPangram("a quick movement of the enemy will jeopardize five gunboats")
+    ).toBe(false);
+  });
+
+  it("missing the letter 'h'", () => {
+    expect(isPangram("five boxing wizards jump quickly at it")).toBe(false);
+  });
+
+  it("with underscores", () => {
+    expect(isPangram("the_quick_brown_fox_jumps_over_the_lazy_dog")).toBe(true);
+  });
+
+  it("with numbers", () => {
+    expect(isPangram("the 1 quick brown fox jumps over the 2 lazy dogs")).toBe(
+      true
+    );
+  });
+
+  it("missing letters replaced by numbers", () => {
+    expect(isPangram("7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog")).toBe(
+      false
+    );
+  });
+
+  it("mixed case and punctuation", () => {
+    expect(isPangram('"Five quacking Zephyrs jolt my wax bed."')).toBe(true);
+  });
+
+  it("case insensitive", () => {
+    expect(isPangram("the quick brown fox jumps over with lazy FX")).toBe(
+      false
+    );
+  });
+});