tests: Add tests for SHA256

tests/CMakeLists.txt

@@ -20,6 +20,7 @@ luna_test(libluna/TestFormat.cpp TestFormat)
 luna_test(libluna/TestHashTable.cpp TestHashTable)
 luna_test(libluna/TestCPath.cpp TestCPath)
 luna_test(libluna/TestSharedPtr.cpp TestSharedPtr)
+luna_test(libluna/TestSHA.cpp TestSHA)
 luna_test(libc/TestScanf.cpp TestScanf)
 luna_test(libc/TestString.cpp TestString)
 luna_test(libc/TestEnv.cpp TestEnv)

tests/libluna/TestSHA.cpp

@@ -0,0 +1,38 @@
+#include <luna/SHA.h>
+#include <string.h>
+#include <test.h>
+
+TestResult test_empty_string_hash()
+{
+    SHA256 sha;
+    auto digest = TRY(sha.digest());
+    auto string = TRY(digest.to_string());
+
+    validate(string.view() == "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
+
+    test_success;
+}
+
+TestResult test_known_string_hash()
+{
+    const char* text = "Hello, world!";
+
+    SHA256 sha;
+    TRY(sha.append((const u8*)text, strlen(text)));
+    auto digest = TRY(sha.digest());
+    auto string = TRY(digest.to_string());
+
+    validate(string.view() == "315f5bdb76d078c43b8ac0064e4a0164612b1fce77c869345bfc94c75894edd3");
+
+    test_success;
+}
+
+Result<void> test_main()
+{
+    test_prelude;
+
+    run_test(test_empty_string_hash);
+    run_test(test_known_string_hash);
+
+    return {};
+}