1 files changed, 63 insertions, 0 deletions
diff --git a/test/js/node/crypto/crypto.test.ts b/test/js/node/crypto/crypto.test.ts
index b5b8e9286..3efd4c317 100644
--- a/test/js/node/crypto/crypto.test.ts
+++ b/test/js/node/crypto/crypto.test.ts
@@ -46,6 +46,69 @@ describe("CryptoHasher", () => {
     );
     expect(hasher.algorithm).toBe("sha512");
   });
+
+  it("CryptoHasher sha256", () => {
+    var hasher = new CryptoHasher("sha256");
+    hasher.update("hello world");
+    expect(hasher.digest("hex")).toBe(
+      "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9",
+    );
+    expect(hasher.algorithm).toBe("sha256");
+  });
+
+  it("CryptoHasher sha256 multi-part", () => {
+    var hasher = new CryptoHasher("sha256");
+    hasher.update("hello ");
+    hasher.update("world");
+    expect(hasher.digest("hex")).toBe(
+      "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9",
+    );
+    expect(hasher.algorithm).toBe("sha256");
+  });
+
+  it("CryptoHasher resets when digest is called", () => {
+    var hasher = new CryptoHasher("sha256");
+    hasher.update("hello");
+    expect(hasher.digest("hex")).toBe(
+      "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
+    );
+    hasher.update("world");
+    expect(hasher.digest("hex")).toBe(
+      "486ea46224d1bb4fb680f34f7c9ad96a8f24ec88be73ea8e5a6c65260e9cb8a7",
+    );
+  });
+
+  for (let alg of CryptoHasher.algorithms) {
+    it(`CryptoHasher ${alg} copy is the same`, () => {
+      const orig = new CryptoHasher(alg);
+      orig.update("hello");
+      const copy = orig.copy();
+
+      expect(copy.digest("hex")).toBe(orig.digest("hex"));
+      expect(copy.algorithm).toBe(orig.algorithm);
+    });
+
+
+    it(`CryptoHasher ${alg} copy is not linked`, () => {
+      const orig = new CryptoHasher(alg);
+      orig.update("hello");
+      const copy = orig.copy();
+
+      orig.update("world");
+      expect(copy.digest("hex")).not.toBe(orig.digest("hex"));
+    });
+
+
+    it(`CryptoHasher ${alg} copy updates the same`, () => {
+      const orig = new CryptoHasher(alg);
+      orig.update("hello");
+      const copy = orig.copy();
+
+      orig.update("world");
+      copy.update("world");
+      expect(copy.digest("hex")).toBe(orig.digest("hex"));
+    });
+  }
 });
 
 describe("crypto", () => {