src/utils_test.cc - platform/art - Git at Google

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "object.h"
 #include "common_test.h"
 #include "utils.h"

 namespace art {

 class UtilsTest : public CommonTest {
 };

 #define EXPECT_DESCRIPTOR(pretty_descriptor, descriptor) \
   do { \
     SirtRef<String> s(String::AllocFromModifiedUtf8(descriptor)); \
     std::string result(PrettyDescriptor(s.get())); \
     EXPECT_EQ(pretty_descriptor, result); \
   } while (false)

 TEST_F(UtilsTest, PrettyDescriptor_ArrayReferences) {
   EXPECT_DESCRIPTOR("java.lang.Class[]", "[Ljava/lang/Class;");
   EXPECT_DESCRIPTOR("java.lang.Class[][]", "[[Ljava/lang/Class;");
 }

 TEST_F(UtilsTest, PrettyDescriptor_ScalarReferences) {
   EXPECT_DESCRIPTOR("java.lang.String", "Ljava.lang.String;");
   EXPECT_DESCRIPTOR("java.lang.String", "Ljava/lang/String;");
 }

 TEST_F(UtilsTest, PrettyDescriptor_PrimitiveArrays) {
   EXPECT_DESCRIPTOR("boolean[]", "[Z");
   EXPECT_DESCRIPTOR("boolean[][]", "[[Z");
   EXPECT_DESCRIPTOR("byte[]", "[B");
   EXPECT_DESCRIPTOR("byte[][]", "[[B");
   EXPECT_DESCRIPTOR("char[]", "[C");
   EXPECT_DESCRIPTOR("char[][]", "[[C");
   EXPECT_DESCRIPTOR("double[]", "[D");
   EXPECT_DESCRIPTOR("double[][]", "[[D");
   EXPECT_DESCRIPTOR("float[]", "[F");
   EXPECT_DESCRIPTOR("float[][]", "[[F");
   EXPECT_DESCRIPTOR("int[]", "[I");
   EXPECT_DESCRIPTOR("int[][]", "[[I");
   EXPECT_DESCRIPTOR("long[]", "[J");
   EXPECT_DESCRIPTOR("long[][]", "[[J");
   EXPECT_DESCRIPTOR("short[]", "[S");
   EXPECT_DESCRIPTOR("short[][]", "[[S");
 }

 TEST_F(UtilsTest, PrettyDescriptor_PrimitiveScalars) {
   EXPECT_DESCRIPTOR("boolean", "Z");
   EXPECT_DESCRIPTOR("byte", "B");
   EXPECT_DESCRIPTOR("char", "C");
   EXPECT_DESCRIPTOR("double", "D");
   EXPECT_DESCRIPTOR("float", "F");
   EXPECT_DESCRIPTOR("int", "I");
   EXPECT_DESCRIPTOR("long", "J");
   EXPECT_DESCRIPTOR("short", "S");
 }

 TEST_F(UtilsTest, PrettyTypeOf) {
   EXPECT_EQ("null", PrettyTypeOf(NULL));

   SirtRef<String> s(String::AllocFromModifiedUtf8(""));
   EXPECT_EQ("java.lang.String", PrettyTypeOf(s.get()));

   SirtRef<ShortArray> a(ShortArray::Alloc(2));
   EXPECT_EQ("short[]", PrettyTypeOf(a.get()));

   Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
   ASSERT_TRUE(c != NULL);
   Object* o = ObjectArray<String>::Alloc(c, 0);
   EXPECT_EQ("java.lang.String[]", PrettyTypeOf(o));
   EXPECT_EQ("java.lang.Class<java.lang.String[]>", PrettyTypeOf(o->GetClass()));
 }

 TEST_F(UtilsTest, PrettyClass) {
   EXPECT_EQ("null", PrettyClass(NULL));
   Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
   ASSERT_TRUE(c != NULL);
   Object* o = ObjectArray<String>::Alloc(c, 0);
   EXPECT_EQ("java.lang.Class<java.lang.String[]>", PrettyClass(o->GetClass()));
 }

 TEST_F(UtilsTest, PrettyClassAndClassLoader) {
   EXPECT_EQ("null", PrettyClassAndClassLoader(NULL));
   Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
   ASSERT_TRUE(c != NULL);
   Object* o = ObjectArray<String>::Alloc(c, 0);
   EXPECT_EQ("java.lang.Class<java.lang.String[],null>", PrettyClassAndClassLoader(o->GetClass()));
 }

 TEST_F(UtilsTest, PrettyField) {
   EXPECT_EQ("null", PrettyField(NULL));

   Class* java_lang_String = class_linker_->FindSystemClass("Ljava/lang/String;");

   Field* f;
   f = java_lang_String->FindDeclaredInstanceField("count", "I");
   EXPECT_EQ("int java.lang.String.count", PrettyField(f));
   EXPECT_EQ("java.lang.String.count", PrettyField(f, false));
   f = java_lang_String->FindDeclaredInstanceField("value", "[C");
   EXPECT_EQ("char[] java.lang.String.value", PrettyField(f));
   EXPECT_EQ("java.lang.String.value", PrettyField(f, false));
 }

 TEST_F(UtilsTest, PrettySize) {
   EXPECT_EQ("1GB", PrettySize(1 * GB));
   EXPECT_EQ("2GB", PrettySize(2 * GB));
   if (sizeof(size_t) > sizeof(uint32_t)) {
     EXPECT_EQ("100GB", PrettySize(100 * GB));
   }
   EXPECT_EQ("1MB", PrettySize(1 * MB));
   EXPECT_EQ("10MB", PrettySize(10 * MB));
   EXPECT_EQ("100MB", PrettySize(100 * MB));
   EXPECT_EQ("1KiB", PrettySize(1 * KB));
   EXPECT_EQ("10KiB", PrettySize(10 * KB));
   EXPECT_EQ("100KiB", PrettySize(100 * KB));
   EXPECT_EQ("1B", PrettySize(1));
   EXPECT_EQ("10B", PrettySize(10));
   EXPECT_EQ("100B", PrettySize(100));
 }

 TEST_F(UtilsTest, PrettyDuration) {
   const uint64_t one_sec = 1000000000;
   const uint64_t one_ms  = 1000000;
   const uint64_t one_us  = 1000;

   EXPECT_EQ("1s", PrettyDuration(1 * one_sec));
   EXPECT_EQ("10s", PrettyDuration(10 * one_sec));
   EXPECT_EQ("100s", PrettyDuration(100 * one_sec));
   EXPECT_EQ("1.001s", PrettyDuration(1 * one_sec + one_ms));
   EXPECT_EQ("1.000001s", PrettyDuration(1 * one_sec + one_us));
   EXPECT_EQ("1.000000001s", PrettyDuration(1 * one_sec + 1));

   EXPECT_EQ("1ms", PrettyDuration(1 * one_ms));
   EXPECT_EQ("10ms", PrettyDuration(10 * one_ms));
   EXPECT_EQ("100ms", PrettyDuration(100 * one_ms));
   EXPECT_EQ("1.001ms", PrettyDuration(1 * one_ms + one_us));
   EXPECT_EQ("1.000001ms", PrettyDuration(1 * one_ms + 1));

   EXPECT_EQ("1us", PrettyDuration(1 * one_us));
   EXPECT_EQ("10us", PrettyDuration(10 * one_us));
   EXPECT_EQ("100us", PrettyDuration(100 * one_us));
   EXPECT_EQ("1.001us", PrettyDuration(1 * one_us + 1));

   EXPECT_EQ("1ns", PrettyDuration(1));
   EXPECT_EQ("10ns", PrettyDuration(10));
   EXPECT_EQ("100ns", PrettyDuration(100));
 }

 TEST_F(UtilsTest, MangleForJni) {
   EXPECT_EQ("hello_00024world", MangleForJni("hello$world"));
   EXPECT_EQ("hello_000a9world", MangleForJni("hello\xc2\xa9world"));
   EXPECT_EQ("hello_1world", MangleForJni("hello_world"));
   EXPECT_EQ("Ljava_lang_String_2", MangleForJni("Ljava/lang/String;"));
   EXPECT_EQ("_3C", MangleForJni("[C"));
 }

 TEST_F(UtilsTest, JniShortName_JniLongName) {
   Class* c = class_linker_->FindSystemClass("Ljava/lang/String;");
   ASSERT_TRUE(c != NULL);
   Method* m;

   m = c->FindVirtualMethod("charAt", "(I)C");
   ASSERT_TRUE(m != NULL);
   EXPECT_EQ("Java_java_lang_String_charAt", JniShortName(m));
   EXPECT_EQ("Java_java_lang_String_charAt__I", JniLongName(m));

   m = c->FindVirtualMethod("indexOf", "(Ljava/lang/String;I)I");
   ASSERT_TRUE(m != NULL);
   EXPECT_EQ("Java_java_lang_String_indexOf", JniShortName(m));
   EXPECT_EQ("Java_java_lang_String_indexOf__Ljava_lang_String_2I", JniLongName(m));

   m = c->FindDirectMethod("copyValueOf", "([CII)Ljava/lang/String;");
   ASSERT_TRUE(m != NULL);
   EXPECT_EQ("Java_java_lang_String_copyValueOf", JniShortName(m));
   EXPECT_EQ("Java_java_lang_String_copyValueOf___3CII", JniLongName(m));
 }

 TEST_F(UtilsTest, Split) {
   std::vector<std::string> actual;
   std::vector<std::string> expected;

   expected.clear();

   actual.clear();
   Split("", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":", ':', actual);
   EXPECT_EQ(expected, actual);

   expected.clear();
   expected.push_back("foo");

   actual.clear();
   Split(":foo", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split("foo:", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":foo:", ':', actual);
   EXPECT_EQ(expected, actual);

   expected.push_back("bar");

   actual.clear();
   Split("foo:bar", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":foo:bar", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split("foo:bar:", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":foo:bar:", ':', actual);
   EXPECT_EQ(expected, actual);

   expected.push_back("baz");

   actual.clear();
   Split("foo:bar:baz", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":foo:bar:baz", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split("foo:bar:baz:", ':', actual);
   EXPECT_EQ(expected, actual);

   actual.clear();
   Split(":foo:bar:baz:", ':', actual);
   EXPECT_EQ(expected, actual);
 }

 TEST_F(UtilsTest, Join) {
   std::vector<std::string> strings;

   strings.clear();
   EXPECT_EQ("", Join(strings, ':'));

   strings.clear();
   strings.push_back("foo");
   EXPECT_EQ("foo", Join(strings, ':'));

   strings.clear();
   strings.push_back("");
   strings.push_back("foo");
   EXPECT_EQ(":foo", Join(strings, ':'));

   strings.clear();
   strings.push_back("foo");
   strings.push_back("");
   EXPECT_EQ("foo:", Join(strings, ':'));

   strings.clear();
   strings.push_back("");
   strings.push_back("foo");
   strings.push_back("");
   EXPECT_EQ(":foo:", Join(strings, ':'));

   strings.clear();
   strings.push_back("foo");
   strings.push_back("bar");
   EXPECT_EQ("foo:bar", Join(strings, ':'));

   strings.clear();
   strings.push_back("foo");
   strings.push_back("bar");
   strings.push_back("baz");
   EXPECT_EQ("foo:bar:baz", Join(strings, ':'));
 }

 }  // namespace art
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "object.h"
	#include "common_test.h"
	#include "utils.h"

	namespace art {

	class UtilsTest : public CommonTest {
	};

	#define EXPECT_DESCRIPTOR(pretty_descriptor, descriptor) \
	do { \
	SirtRef<String> s(String::AllocFromModifiedUtf8(descriptor)); \
	std::string result(PrettyDescriptor(s.get())); \
	EXPECT_EQ(pretty_descriptor, result); \
	} while (false)

	TEST_F(UtilsTest, PrettyDescriptor_ArrayReferences) {
	EXPECT_DESCRIPTOR("java.lang.Class[]", "[Ljava/lang/Class;");
	EXPECT_DESCRIPTOR("java.lang.Class[][]", "[[Ljava/lang/Class;");
	}

	TEST_F(UtilsTest, PrettyDescriptor_ScalarReferences) {
	EXPECT_DESCRIPTOR("java.lang.String", "Ljava.lang.String;");
	EXPECT_DESCRIPTOR("java.lang.String", "Ljava/lang/String;");
	}

	TEST_F(UtilsTest, PrettyDescriptor_PrimitiveArrays) {
	EXPECT_DESCRIPTOR("boolean[]", "[Z");
	EXPECT_DESCRIPTOR("boolean[][]", "[[Z");
	EXPECT_DESCRIPTOR("byte[]", "[B");
	EXPECT_DESCRIPTOR("byte[][]", "[[B");
	EXPECT_DESCRIPTOR("char[]", "[C");
	EXPECT_DESCRIPTOR("char[][]", "[[C");
	EXPECT_DESCRIPTOR("double[]", "[D");
	EXPECT_DESCRIPTOR("double[][]", "[[D");
	EXPECT_DESCRIPTOR("float[]", "[F");
	EXPECT_DESCRIPTOR("float[][]", "[[F");
	EXPECT_DESCRIPTOR("int[]", "[I");
	EXPECT_DESCRIPTOR("int[][]", "[[I");
	EXPECT_DESCRIPTOR("long[]", "[J");
	EXPECT_DESCRIPTOR("long[][]", "[[J");
	EXPECT_DESCRIPTOR("short[]", "[S");
	EXPECT_DESCRIPTOR("short[][]", "[[S");
	}

	TEST_F(UtilsTest, PrettyDescriptor_PrimitiveScalars) {
	EXPECT_DESCRIPTOR("boolean", "Z");
	EXPECT_DESCRIPTOR("byte", "B");
	EXPECT_DESCRIPTOR("char", "C");
	EXPECT_DESCRIPTOR("double", "D");
	EXPECT_DESCRIPTOR("float", "F");
	EXPECT_DESCRIPTOR("int", "I");
	EXPECT_DESCRIPTOR("long", "J");
	EXPECT_DESCRIPTOR("short", "S");
	}

	TEST_F(UtilsTest, PrettyTypeOf) {
	EXPECT_EQ("null", PrettyTypeOf(NULL));

	SirtRef<String> s(String::AllocFromModifiedUtf8(""));
	EXPECT_EQ("java.lang.String", PrettyTypeOf(s.get()));

	SirtRef<ShortArray> a(ShortArray::Alloc(2));
	EXPECT_EQ("short[]", PrettyTypeOf(a.get()));

	Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
	ASSERT_TRUE(c != NULL);
	Object* o = ObjectArray<String>::Alloc(c, 0);
	EXPECT_EQ("java.lang.String[]", PrettyTypeOf(o));
	EXPECT_EQ("java.lang.Class<java.lang.String[]>", PrettyTypeOf(o->GetClass()));
	}

	TEST_F(UtilsTest, PrettyClass) {
	EXPECT_EQ("null", PrettyClass(NULL));
	Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
	ASSERT_TRUE(c != NULL);
	Object* o = ObjectArray<String>::Alloc(c, 0);
	EXPECT_EQ("java.lang.Class<java.lang.String[]>", PrettyClass(o->GetClass()));
	}

	TEST_F(UtilsTest, PrettyClassAndClassLoader) {
	EXPECT_EQ("null", PrettyClassAndClassLoader(NULL));
	Class* c = class_linker_->FindSystemClass("[Ljava/lang/String;");
	ASSERT_TRUE(c != NULL);
	Object* o = ObjectArray<String>::Alloc(c, 0);
	EXPECT_EQ("java.lang.Class<java.lang.String[],null>", PrettyClassAndClassLoader(o->GetClass()));
	}

	TEST_F(UtilsTest, PrettyField) {
	EXPECT_EQ("null", PrettyField(NULL));

	Class* java_lang_String = class_linker_->FindSystemClass("Ljava/lang/String;");

	Field* f;
	f = java_lang_String->FindDeclaredInstanceField("count", "I");
	EXPECT_EQ("int java.lang.String.count", PrettyField(f));
	EXPECT_EQ("java.lang.String.count", PrettyField(f, false));
	f = java_lang_String->FindDeclaredInstanceField("value", "[C");
	EXPECT_EQ("char[] java.lang.String.value", PrettyField(f));
	EXPECT_EQ("java.lang.String.value", PrettyField(f, false));
	}

	TEST_F(UtilsTest, PrettySize) {
	EXPECT_EQ("1GB", PrettySize(1 * GB));
	EXPECT_EQ("2GB", PrettySize(2 * GB));
	if (sizeof(size_t) > sizeof(uint32_t)) {
	EXPECT_EQ("100GB", PrettySize(100 * GB));
	}
	EXPECT_EQ("1MB", PrettySize(1 * MB));
	EXPECT_EQ("10MB", PrettySize(10 * MB));
	EXPECT_EQ("100MB", PrettySize(100 * MB));
	EXPECT_EQ("1KiB", PrettySize(1 * KB));
	EXPECT_EQ("10KiB", PrettySize(10 * KB));
	EXPECT_EQ("100KiB", PrettySize(100 * KB));
	EXPECT_EQ("1B", PrettySize(1));
	EXPECT_EQ("10B", PrettySize(10));
	EXPECT_EQ("100B", PrettySize(100));
	}

	TEST_F(UtilsTest, PrettyDuration) {
	const uint64_t one_sec = 1000000000;
	const uint64_t one_ms = 1000000;
	const uint64_t one_us = 1000;

	EXPECT_EQ("1s", PrettyDuration(1 * one_sec));
	EXPECT_EQ("10s", PrettyDuration(10 * one_sec));
	EXPECT_EQ("100s", PrettyDuration(100 * one_sec));
	EXPECT_EQ("1.001s", PrettyDuration(1 * one_sec + one_ms));
	EXPECT_EQ("1.000001s", PrettyDuration(1 * one_sec + one_us));
	EXPECT_EQ("1.000000001s", PrettyDuration(1 * one_sec + 1));

	EXPECT_EQ("1ms", PrettyDuration(1 * one_ms));
	EXPECT_EQ("10ms", PrettyDuration(10 * one_ms));
	EXPECT_EQ("100ms", PrettyDuration(100 * one_ms));
	EXPECT_EQ("1.001ms", PrettyDuration(1 * one_ms + one_us));
	EXPECT_EQ("1.000001ms", PrettyDuration(1 * one_ms + 1));

	EXPECT_EQ("1us", PrettyDuration(1 * one_us));
	EXPECT_EQ("10us", PrettyDuration(10 * one_us));
	EXPECT_EQ("100us", PrettyDuration(100 * one_us));
	EXPECT_EQ("1.001us", PrettyDuration(1 * one_us + 1));

	EXPECT_EQ("1ns", PrettyDuration(1));
	EXPECT_EQ("10ns", PrettyDuration(10));
	EXPECT_EQ("100ns", PrettyDuration(100));
	}

	TEST_F(UtilsTest, MangleForJni) {
	EXPECT_EQ("hello_00024world", MangleForJni("hello$world"));
	EXPECT_EQ("hello_000a9world", MangleForJni("hello\xc2\xa9world"));
	EXPECT_EQ("hello_1world", MangleForJni("hello_world"));
	EXPECT_EQ("Ljava_lang_String_2", MangleForJni("Ljava/lang/String;"));
	EXPECT_EQ("_3C", MangleForJni("[C"));
	}

	TEST_F(UtilsTest, JniShortName_JniLongName) {
	Class* c = class_linker_->FindSystemClass("Ljava/lang/String;");
	ASSERT_TRUE(c != NULL);
	Method* m;

	m = c->FindVirtualMethod("charAt", "(I)C");
	ASSERT_TRUE(m != NULL);
	EXPECT_EQ("Java_java_lang_String_charAt", JniShortName(m));
	EXPECT_EQ("Java_java_lang_String_charAt__I", JniLongName(m));

	m = c->FindVirtualMethod("indexOf", "(Ljava/lang/String;I)I");
	ASSERT_TRUE(m != NULL);
	EXPECT_EQ("Java_java_lang_String_indexOf", JniShortName(m));
	EXPECT_EQ("Java_java_lang_String_indexOf__Ljava_lang_String_2I", JniLongName(m));

	m = c->FindDirectMethod("copyValueOf", "([CII)Ljava/lang/String;");
	ASSERT_TRUE(m != NULL);
	EXPECT_EQ("Java_java_lang_String_copyValueOf", JniShortName(m));
	EXPECT_EQ("Java_java_lang_String_copyValueOf___3CII", JniLongName(m));
	}

	TEST_F(UtilsTest, Split) {
	std::vector<std::string> actual;
	std::vector<std::string> expected;

	expected.clear();

	actual.clear();
	Split("", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":", ':', actual);
	EXPECT_EQ(expected, actual);

	expected.clear();
	expected.push_back("foo");

	actual.clear();
	Split(":foo", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split("foo:", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":foo:", ':', actual);
	EXPECT_EQ(expected, actual);

	expected.push_back("bar");

	actual.clear();
	Split("foo:bar", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":foo:bar", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split("foo:bar:", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":foo:bar:", ':', actual);
	EXPECT_EQ(expected, actual);

	expected.push_back("baz");

	actual.clear();
	Split("foo:bar:baz", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":foo:bar:baz", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split("foo:bar:baz:", ':', actual);
	EXPECT_EQ(expected, actual);

	actual.clear();
	Split(":foo:bar:baz:", ':', actual);
	EXPECT_EQ(expected, actual);
	}

	TEST_F(UtilsTest, Join) {
	std::vector<std::string> strings;

	strings.clear();
	EXPECT_EQ("", Join(strings, ':'));

	strings.clear();
	strings.push_back("foo");
	EXPECT_EQ("foo", Join(strings, ':'));

	strings.clear();
	strings.push_back("");
	strings.push_back("foo");
	EXPECT_EQ(":foo", Join(strings, ':'));

	strings.clear();
	strings.push_back("foo");
	strings.push_back("");
	EXPECT_EQ("foo:", Join(strings, ':'));

	strings.clear();
	strings.push_back("");
	strings.push_back("foo");
	strings.push_back("");
	EXPECT_EQ(":foo:", Join(strings, ':'));

	strings.clear();
	strings.push_back("foo");
	strings.push_back("bar");
	EXPECT_EQ("foo:bar", Join(strings, ':'));

	strings.clear();
	strings.push_back("foo");
	strings.push_back("bar");
	strings.push_back("baz");
	EXPECT_EQ("foo:bar:baz", Join(strings, ':'));
	}

	} // namespace art