apacheGH-43175: [C++] Skip not Emscripten ready tests in CSV tests (a…

…pache#43724)

### Rationale for this change

We can't use thread nor `%z` on Emacripten. Some CSV tests use them.

### What changes are included in this PR?

Skip CSV tests that use thread or `%z`.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* GitHub Issue: apache#43175

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>

ci/scripts/cpp_test.sh

@@ -80,7 +80,7 @@ case "$(uname)" in
     ;;
 esac
 
-if [ "${ARROW_EMSCRIPTEN:-OFF}" = "ON" ]; then  
+if [ "${ARROW_EMSCRIPTEN:-OFF}" = "ON" ]; then
   n_jobs=1 # avoid spurious fails on emscripten due to loading too many big executables
 fi
 

cpp/src/arrow/csv/column_decoder_test.cc

@@ -175,6 +175,9 @@ class NullColumnDecoderTest : public ColumnDecoderTest {
   }
 
   void TestThreaded() {
+#ifndef ARROW_ENABLE_THREADING
+    GTEST_SKIP() << "Test requires threading support";
+#endif
     constexpr int NITERS = 10;
     auto type = int32();
     MakeDecoder(type);
@@ -257,6 +260,10 @@ class TypedColumnDecoderTest : public ColumnDecoderTest {
   }
 
   void TestThreaded() {
+#ifndef ARROW_ENABLE_THREADING
+    GTEST_SKIP() << "Test requires threading support";
+#endif
+
     constexpr int NITERS = 10;
     auto type = uint32();
     MakeDecoder(type, default_options);
@@ -305,6 +312,10 @@ class InferringColumnDecoderTest : public ColumnDecoderTest {
   }
 
   void TestThreaded() {
+#ifndef ARROW_ENABLE_THREADING
+    GTEST_SKIP() << "Test requires threading support";
+#endif
+
     constexpr int NITERS = 10;
     auto type = float64();
     MakeDecoder(default_options);

cpp/src/arrow/csv/converter_test.cc

@@ -625,6 +625,11 @@ TEST(TimestampConversion, UserDefinedParsers) {
 }
 
 TEST(TimestampConversion, UserDefinedParsersWithZone) {
+#ifdef __EMSCRIPTEN__
+  GTEST_SKIP() << "Test temporarily disabled due to emscripten bug "
+                  "https://github.com/emscripten-core/emscripten/issues/20467";
+#endif
+
   auto options = ConvertOptions::Defaults();
   auto type = timestamp(TimeUnit::SECOND, "America/Phoenix");