Merge #18181: test: Remove incorrect assumptions in validation_flush_tests

faca8ef test: Remove incorrect assumptions in validation_flush_tests (MarcoFalke)
fa31eeb test: Tabs to spaces in all tests (MarcoFalke)

Pull request description:

  The tests assume standard library internals that may not hold on all supported archs or when the code is instrumented for sanitizer or debug use cases

  Fixes #18111

ACKs for top commit:
  jamesob:
    ACK bitcoin/bitcoin@faca8ef pending passing tests
  fjahr:
    ACK faca8ef

Tree-SHA512: 60a5ae824bdffb0762f82f67957b31b185385900be5e676fcb12c23d53f5eea734601680c2e3f0bdb8052ce90e7ca1911b1342affb67e43d91a506b111406f41

Author: MarcoFalke

src/test/bswap_tests.cpp

@@ -11,16 +11,16 @@ BOOST_FIXTURE_TEST_SUITE(bswap_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(bswap_tests)
 {
-	// Sibling in bitcoin/src/qt/test/compattests.cpp
-	uint16_t u1 = 0x1234;
-	uint32_t u2 = 0x56789abc;
-	uint64_t u3 = 0xdef0123456789abc;
-	uint16_t e1 = 0x3412;
-	uint32_t e2 = 0xbc9a7856;
-	uint64_t e3 = 0xbc9a78563412f0de;
-	BOOST_CHECK(bswap_16(u1) == e1);
-	BOOST_CHECK(bswap_32(u2) == e2);
-	BOOST_CHECK(bswap_64(u3) == e3);
+    // Sibling in bitcoin/src/qt/test/compattests.cpp
+    uint16_t u1 = 0x1234;
+    uint32_t u2 = 0x56789abc;
+    uint64_t u3 = 0xdef0123456789abc;
+    uint16_t e1 = 0x3412;
+    uint32_t e2 = 0xbc9a7856;
+    uint64_t e3 = 0xbc9a78563412f0de;
+    BOOST_CHECK(bswap_16(u1) == e1);
+    BOOST_CHECK(bswap_32(u2) == e2);
+    BOOST_CHECK(bswap_64(u3) == e3);
 }
 
 BOOST_AUTO_TEST_SUITE_END()

src/test/transaction_tests.cpp

@@ -122,10 +122,9 @@ BOOST_AUTO_TEST_CASE(tx_valid)
             std::map<COutPoint, int64_t> mapprevOutValues;
             UniValue inputs = test[0].get_array();
             bool fValid = true;
-	    for (unsigned int inpIdx = 0; inpIdx < inputs.size(); inpIdx++) {
-	        const UniValue& input = inputs[inpIdx];
-                if (!input.isArray())
-                {
+            for (unsigned int inpIdx = 0; inpIdx < inputs.size(); inpIdx++) {
+                const UniValue& input = inputs[inpIdx];
+                if (!input.isArray()) {
                     fValid = false;
                     break;
                 }
@@ -209,10 +208,9 @@ BOOST_AUTO_TEST_CASE(tx_invalid)
             std::map<COutPoint, int64_t> mapprevOutValues;
             UniValue inputs = test[0].get_array();
             bool fValid = true;
-	    for (unsigned int inpIdx = 0; inpIdx < inputs.size(); inpIdx++) {
-	        const UniValue& input = inputs[inpIdx];
-                if (!input.isArray())
-                {
+            for (unsigned int inpIdx = 0; inpIdx < inputs.size(); inpIdx++) {
+                const UniValue& input = inputs[inpIdx];
+                if (!input.isArray()) {
                     fValid = false;
                     break;
                 }

src/test/validation_flush_tests.cpp

@@ -2,10 +2,10 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
-#include <txmempool.h>
-#include <validation.h>
 #include <sync.h>
 #include <test/util/setup_common.h>
+#include <txmempool.h>
+#include <validation.h>
 
 #include <boost/test/unit_test.hpp>
 
@@ -85,12 +85,7 @@ BOOST_AUTO_TEST_CASE(getcoinscachesizestate)
     // This is contingent not only on the dynamic memory usage of the Coins
     // that we're adding (COIN_SIZE bytes per), but also on how much memory the
     // cacheCoins (unordered_map) preallocates.
-    //
-    // I came up with the count by examining the printed memory usage of the
-    // CCoinsCacheView, so it's sort of arbitrary - but it shouldn't change
-    // unless we somehow change the way the cacheCoins map allocates memory.
-    //
-    constexpr int COINS_UNTIL_CRITICAL = is_64_bit ? 4 : 5;
+    constexpr int COINS_UNTIL_CRITICAL{3};
 
     for (int i{0}; i < COINS_UNTIL_CRITICAL; ++i) {
         COutPoint res = add_coin(view);
@@ -101,17 +96,14 @@ BOOST_AUTO_TEST_CASE(getcoinscachesizestate)
             CoinsCacheSizeState::OK);
     }
 
-    // Adding an additional coin will push us over the edge to CRITICAL.
-    add_coin(view);
-    print_view_mem_usage(view);
-
-    auto size_state = chainstate.GetCoinsCacheSizeState(
-        tx_pool, MAX_COINS_CACHE_BYTES, /*max_mempool_size_bytes*/ 0);
-
-    if (!is_64_bit && size_state == CoinsCacheSizeState::LARGE) {
-        // On 32 bit hosts, we may hit LARGE before CRITICAL.
+    // Adding some additional coins will push us over the edge to CRITICAL.
+    for (int i{0}; i < 4; ++i) {
         add_coin(view);
         print_view_mem_usage(view);
+        if (chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES, /*max_mempool_size_bytes*/ 0) ==
+            CoinsCacheSizeState::CRITICAL) {
+            break;
+        }
     }
 
     BOOST_CHECK_EQUAL(