Unit Tests

src/test/java/fabrik/simulator/pic16f84/EEPROMTests.java

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+package fabrik.simulator.pic16f84;
+
+import fabrik.simulator.pic16f84.interfaces.CommandInterface;
+import fabrik.simulator.pic16f84.interfaces.DataRegisterInterface;
+import fabrik.simulator.pic16f84.interfaces.EEPROMInterface;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.mock;
+
+
+class EEPROMTests {
+    PICComponents picComponents;
+    String savedEEPROM;
+
+    public EEPROMTests() {}
+
+    @BeforeEach
+    void resetComponentsAndReadEEPROM() throws IOException {
+        picComponents = new PICComponents();
+        savedEEPROM = Files.readString(Path.of("eeprom.json"));
+    }
+
+    @AfterEach
+    public void rewriteEEPROM() throws IOException {
+        FileWriter writer = new FileWriter("eeprom.json");
+        writer.write(savedEEPROM);
+        writer.close();
+    }
+
+    @Test
+    @DisplayName("EEPROM read gibt gültigen Wert zurück")
+    void eepromReadReturnsValidLong() throws IOException {
+        FileWriter writer = new FileWriter("eeprom.json");
+        writer.write("{\"0\": 255}");
+        writer.close();
+
+        DataRegisterInterface mockDataRegister = Mockito.mock(DataRegisterInterface.class);
+        picComponents.registerComponent(DataRegisterInterface.class, mockDataRegister);
+
+        EEPROMInterface eeprom = new EEPROM();
+        picComponents.registerComponent(EEPROMInterface.class, eeprom);
+        picComponents.initAll();
+
+
+        long value = eeprom.read(0);
+
+
+        assertEquals(255, value);
+    }
+
+
+    @Test
+    @DisplayName("EEPROM write schreibt an die korrekte Adresse in eeprom.json")
+    void eepromWritesCorrectly() throws IOException {
+        FileWriter writer = new FileWriter("eeprom.json");
+        writer.write("{}");
+        writer.close();
+
+        DataRegisterInterface mockDataRegister = Mockito.mock(DataRegisterInterface.class);
+        picComponents.registerComponent(DataRegisterInterface.class, mockDataRegister);
+
+        CommandInterface mockCommands = mock(CommandInterface.class);
+        picComponents.registerComponent(CommandInterface.class, mockCommands);
+
+        EEPROMInterface eeprom = new EEPROM();
+        picComponents.registerComponent(EEPROMInterface.class, eeprom);
+        picComponents.initAll();
+
+
+        eeprom.write(3, 123);
+
+
+        assertEquals("{\"3\":123}", Files.readString(Path.of("eeprom.json")));
+    }
+
+
+    @Test
+    @DisplayName("EEPROM write schreibt nicht an negative Adressen")
+    void eepromDoesntWriteNegative() throws IOException {
+        FileWriter writer = new FileWriter("eeprom.json");
+        writer.write("{}");
+        writer.close();
+
+        DataRegisterInterface mockDataRegister = Mockito.mock(DataRegisterInterface.class);
+        picComponents.registerComponent(DataRegisterInterface.class, mockDataRegister);
+
+        CommandInterface mockCommands = mock(CommandInterface.class);
+        picComponents.registerComponent(CommandInterface.class, mockCommands);
+
+        EEPROMInterface eeprom = new EEPROM();
+        picComponents.registerComponent(EEPROMInterface.class, eeprom);
+        picComponents.initAll();
+
+
+        eeprom.write(-1, 1);
+
+
+        assertEquals("{}", Files.readString(Path.of("eeprom.json")));
+    }
+
+
+    @Test
+    @DisplayName("EEPROM read mit negativem Wert liefert 0")
+    void eepromReadWithNegativeAddress() throws IOException {
+        FileWriter writer = new FileWriter("eeprom.json");
+        writer.write("{\"-1\":5}");
+        writer.close();
+
+        DataRegisterInterface mockDataRegister = Mockito.mock(DataRegisterInterface.class);
+        picComponents.registerComponent(DataRegisterInterface.class, mockDataRegister);
+
+        CommandInterface mockCommands = mock(CommandInterface.class);
+        picComponents.registerComponent(CommandInterface.class, mockCommands);
+
+        EEPROMInterface eeprom = new EEPROM();
+        picComponents.registerComponent(EEPROMInterface.class, eeprom);
+        picComponents.initAll();
+
+
+        long result = eeprom.read(-1);
+
+
+        assertEquals(0, result);
+    }
+
+}