Add miniscript_string fuzz test

sipa · sipa · commit 6f497145f804 · 2022-04-19T17:18:39.000-04:00
diff --git a/bitcoin/test/fuzz/miniscript_random.cpp b/bitcoin/test/fuzz/miniscript_random.cpp
@@ -872,3 +872,18 @@ FUZZ_TARGET_INIT(miniscript_random_smart, FuzzInitSmart)
         return ConsumeNodeSmart(provider, needed_type);
     }, PickValue(provider, BASE_TYPES), true), provider);
 }
+
+/* Fuzz tests that test parsing from a string, and roundtripping via string. */
+FUZZ_TARGET_INIT(miniscript_string, FuzzInit)
+{
+    FuzzedDataProvider provider(buffer.data(), buffer.size());
+    auto str = provider.ConsumeRemainingBytesAsString();
+    auto parsed = miniscript::FromString(str, PARSER_CTX);
+    if (!parsed) return;
+
+    std::string str2;
+    assert(parsed->ToString(PARSER_CTX, str2));
+    auto parsed2 = miniscript::FromString(str2, PARSER_CTX);
+    assert(parsed2);
+    assert(*parsed == *parsed2);
+}
