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#include "prometheus/counter.h"
#include <gtest/gtest.h>
namespace prometheus {
namespace {
TEST(CounterTest, initialize_with_zero) {
Counter counter;
EXPECT_EQ(counter.Value(), 0);
}
TEST(CounterTest, inc) {
Counter counter;
counter.Increment();
EXPECT_EQ(counter.Value(), 1.0);
}
TEST(CounterTest, inc_number) {
Counter counter;
counter.Increment(4);
EXPECT_EQ(counter.Value(), 4.0);
}
TEST(CounterTest, inc_multiple) {
Counter counter;
counter.Increment();
counter.Increment();
counter.Increment(5);
EXPECT_EQ(counter.Value(), 7.0);
}
TEST(CounterTest, inc_negative_value) {
Counter counter;
counter.Increment(5.0);
counter.Increment(-5.0);
EXPECT_EQ(counter.Value(), 5.0);
}
} // namespace
} // namespace prometheus
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