Test: Add string formatting tests

test/unit/testutilformat.cpp

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <cstddef> // size_t
+#include <cstdint> // int32_t, uint32_t, int64_t
+#include <map>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "macro.h"
+#include "testcase.h"
+#include "testsuite.h"
+#include "util/format/format.h"
+
+// -----------------------------------------
+
+TEST_CASE(FormatBasicTypes)
+{
+	std::string result;
+
+	strln(result, "");
+	EXPECT_EQ(result, "");
+
+	strln(result, "{}", nullptr);
+	EXPECT_EQ(result, "(nil)");
+
+	int* number = new int(3);
+	strln(result, "{}", number);
+	EXPECT_EQ(result.substr(0, 2), "0x");
+
+	strln(result, "{}", true);
+	EXPECT_EQ(result, "true");
+
+	strln(result, "{}", false);
+	EXPECT_EQ(result, "false");
+
+	strln(result, "{}", 'c');
+	EXPECT_EQ(result, "c");
+
+	const char* cString = "C string";
+	strln(result, "{}", cString);
+	EXPECT_EQ(result, "C string");
+
+	std::string string = "string";
+	strln(result, "{}", string);
+	EXPECT_EQ(result, "string");
+
+	std::string_view stringView = "string_view";
+	strln(result, "{}", stringView);
+	EXPECT_EQ(result, "string_view");
+
+	strln(result, "{} {}", "Hello", "World");
+	EXPECT_EQ(result, "Hello World");
+
+	strln(result, "{{escaped braces}}");
+	EXPECT_EQ(result, "{escaped braces}");
+
+	strln(result, "{{braces{}}}", "Something");
+	EXPECT_EQ(result, "{bracesSomething}");
+}
+
+TEST_CASE(FormatNumbers)
+{
+	std::string result;
+
+	int32_t i32 = 68766;
+	strln(result, "{}", i32); // int
+	EXPECT_EQ(result, "68766");
+
+	uint32_t u32 = 123841; // unsigned int
+	strln(result, "{}", u32);
+	EXPECT_EQ(result, "123841");
+
+	int64_t i64 = 237942768427; // long int
+	strln(result, "{}", i64);
+	EXPECT_EQ(result, "237942768427");
+
+	size_t u64 = 1337; // long unsigned int
+	strln(result, "{}", u64);
+	EXPECT_EQ(result, "1337");
+
+	float f32R = 245789.70000;
+	strln(result, "{}", f32R);
+	EXPECT_EQ(result, "245789.7");
+
+	float f32 = 45645.3233;
+	strln(result, "{}", f32);
+	EXPECT_EQ(result, "45645.324219");
+
+	double f64 = 87522.300000000;
+	strln(result, "{}", f64);
+	EXPECT_EQ(result, "87522.3");
+
+	double pi = 3.14159265359;
+	strln(result, "{:.15}", pi);
+	EXPECT_EQ(result, "3.14159265359");
+}
+
+TEST_CASE(FormatContainers)
+{
+	std::string result;
+
+	std::vector<std::string> vector { "thing1", "thing2", "thing3" };
+	strln(result, "{}", vector);
+	EXPECT_EQ(result, R"({
+    thing1,
+    thing2,
+    thing3
+})");
+
+	std::map<std::string, int> map { { "thing3", 3 }, { "thing2", 2 }, { "thing1", 1 } };
+	strln(result, "{}", map);
+	EXPECT_EQ(result, R"({
+    "thing1": 1,
+    "thing2": 2,
+    "thing3": 3
+})");
+
+	// Multidimensional containers arent supported,
+	// the user should write a customization point
+	std::vector<std::vector<std::string>> twoDimensionalVector {
+		{ "thing1", "thing2", "thing3" },
+		{ "thing1", "thing2", "thing3" }
+	};
+	strln(result, "{}", twoDimensionalVector);
+	EXPECT_EQ(result, R"({
+    {
+    thing1,
+    thing2,
+    thing3
+},
+    {
+    thing1,
+    thing2,
+    thing3
+}
+})");
+}