Add minifier tests

CMakeLists.txt

@@ -61,6 +61,7 @@ add_executable(jsonc_tests
   tests/integration/json_valid_json_tests.cpp
   #  Visitors.
   tests/integration/json_beautifier_tests.cpp
+  tests/integration/json_minifier_tests.cpp
 )
 
 target_link_libraries(jsonc_tests jsonc)

tests/integration/json_minifier_tests.cpp

@@ -0,0 +1,67 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock.h>
+
+#include "json.h"
+#include "json_minifier.h"
+#include "test_utils.h"
+
+using ::test_utils::TestData;
+using ::test_utils::PrepareTestData;
+using ::testing::AnyOfArray;
+
+class MinifyJsonTestingFixture: public ::testing::TestWithParam<TestData<std::string>> {
+  protected:
+    json::JsonMinifier minifier;
+};
+
+INSTANTIATE_TEST_SUITE_P(
+        MinifyJsonTests,
+        MinifyJsonTestingFixture,
+        ::testing::Values(
+            // Basics.
+            PrepareTestData<std::string>("null", { "null" }),
+            PrepareTestData<std::string>("true", { "true" }),
+            PrepareTestData<std::string>("false", { "false" }),
+            PrepareTestData<std::string>("1", { "1" }),
+            PrepareTestData<std::string>(R"("Hello World")", { R"("Hello World")" }),
+
+            PrepareTestData<std::string>("{}", { "{}" }),
+            PrepareTestData<std::string>("[]", { "[]" }),
+
+            // Basics with extra spaces.
+            PrepareTestData<std::string>("    null   ", { "null" }),
+            PrepareTestData<std::string>("true \t \t    \n", { "true" }),
+            PrepareTestData<std::string>("\r \r \t false", { "false" }),
+            PrepareTestData<std::string>("   1     ", { "1" }),
+            PrepareTestData<std::string>(R"(     "Hello World" )", { R"("Hello World")" }),
+
+            PrepareTestData<std::string>("\n\t{\t\t\t\t}\n\n\n\n", { "{}" }),
+            PrepareTestData<std::string>("\r\t\t\n[\n\n\n\n]\t\t\t\t", { "[]" }),
+
+            // Arrays.
+            PrepareTestData<std::string>("[true, 1,     5 \n]", { "[true,1,5]" }),
+            PrepareTestData<std::string>("[true,\t -1,\n\t 5, [8, \t false] ]", { "[true,-1,5,[8,false]]" }),
+            PrepareTestData<std::string>("[true,\t -1,\n\t 5, [8, null\t, [\n \n \"hello world\", 8.3], true \n] ]", { R"([true,-1,5,[8,null,["hello world",8.3],true]])" }),
+
+            // Objects.
+            PrepareTestData<std::string>(R"({   "b":   [ 1, true, null, ["b"   ]] })", { R"({"b":[1,true,null,["b"]]})" }),
+            PrepareTestData<std::string>(
+                R"({   "b":   [ 1, true, null, ["b"   ]]  , "c": "a" })",
+                {
+                    R"({"b":[1,true,null,["b"]],"c":"a"})",
+                    R"({"c":"a","b":[1,true,null,["b"]]})"
+                }
+            )
+        )
+);
+
+TEST_P(MinifyJsonTestingFixture, ValidJsonYieldsBeautifiedString) {
+    const auto& pair = GetParam();
+
+    const auto& json = pair.first;
+    const auto& expected_jsons = pair.second;
+
+    const auto& json_value = json::Json::fromJson(json);
+    const auto& beautified_json = minifier.minify(*json_value);
+    EXPECT_THAT(beautified_json, AnyOfArray(expected_jsons));
+}