Add Tests to test-common

tests/test-common.cc

@@ -32,7 +32,102 @@
 #include "catch2/catch.hpp"
 
 #include <common.h>
+#include <conky.h>
 
 TEST_CASE("to_real_path becomes homedir", "[to_real_path]") {
   REQUIRE(to_real_path("~/test") == std::string(getenv("HOME")) + "/test");
 }
+
+TEST_CASE("variables are substituted correctly", "[variable_substitute]") {
+  SECTION("an empty string input returns an empty string") {
+    REQUIRE(variable_substitute("") == "");
+  }
+
+  SECTION("string in with no $ returns same string") {
+    std::string string_alpha = "abcdefghijklmnopqrstuvwxyz";
+    std::string string_numbers = "1234567890";
+    std::string string_special = "`~!@#$%^&*()-=_+[]{}\\|;:'\",<.>/?";
+
+    REQUIRE(variable_substitute(string_alpha) == string_alpha);
+    REQUIRE(variable_substitute(string_numbers) == string_numbers);
+    REQUIRE(variable_substitute(string_special) == string_special);
+  }
+}
+
+TEST_CASE("cpu_percentage and cpu_barval return correct values") {
+  struct text_object obj0;
+  obj0.data.i = 0;
+  struct text_object obj1;
+  obj1.data.i = 1;
+  struct text_object obj2;
+  obj2.data.i = 2;
+  info.cpu_count = 1;
+
+  SECTION("for non-existent cpu") {
+    info.cpu_usage = new float[2];
+    info.cpu_usage[0] = 0.253;
+    info.cpu_usage[1] = 0.507;
+
+    REQUIRE(cpu_barval(&obj2) == 0);
+
+    // This does not exist in Catch2, but would be nice to have since that's
+    // what happens in this case.
+    // REQUIRE_EXIT(cpu_percentage(&obj2));
+
+    delete[] info.cpu_usage;
+  }
+
+  SECTION("for cpu_usage == nullptr") {
+    info.cpu_usage = nullptr;
+
+    REQUIRE(cpu_percentage(&obj0) == 0);
+    REQUIRE(cpu_barval(&obj0) == 0);
+    REQUIRE(cpu_percentage(&obj1) == 0);
+    REQUIRE(cpu_barval(&obj1) == 0);
+  }
+
+  SECTION("for cpu_usage has data") {
+    info.cpu_usage = new float[2];
+    info.cpu_usage[0] = 0.253;
+    info.cpu_usage[1] = 0.507;
+
+    REQUIRE(cpu_percentage(&obj0) == 25);
+    REQUIRE(cpu_barval(&obj0) == Approx(0.253));
+    REQUIRE(cpu_percentage(&obj1) == 51);
+    REQUIRE(cpu_barval(&obj1) == Approx(0.507));
+
+    delete[] info.cpu_usage;
+  }
+}
+
+TEST_CASE("mem_with_buffers_barval returns correct value") {
+  info.memwithbuffers = 6;
+
+  SECTION("for memmax == 0") {
+    info.memmax = 0;
+    REQUIRE(mem_with_buffers_barval(nullptr) == 0);
+  }
+
+  SECTION("for memmax > 0") {
+    info.memmax = 24;
+    REQUIRE(mem_with_buffers_barval(nullptr) == Approx(0.25));
+  }
+}
+
+TEST_CASE("swap_percentage and swap_barval return correct values") {
+  info.swap = 6;
+
+  SECTION("for swapmax == 0") {
+    info.swapmax = 0;
+
+    REQUIRE(swap_percentage(nullptr) == 0);
+    REQUIRE(swap_barval(nullptr) == 0);
+  }
+
+  SECTION("for swapmax > 0") {
+    info.swapmax = 24;
+
+    REQUIRE(swap_percentage(nullptr) == 25);
+    REQUIRE(swap_barval(nullptr) == Approx(0.25));
+  }
+}