[comp-str-enum] Comparing a String to an Enum Value in Java (#13349)

core-java-modules/core-java-lang-oop-types-2/src/test/java/com/baeldung/enums/comparestrenum/CompareStringAndEnumUnitTest.java

@@ -0,0 +1,78 @@
+package com.baeldung.enums.comparestrenum;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.Optional;
+
+import static com.baeldung.enums.comparestrenum.Weekday.Fri;
+import static com.baeldung.enums.comparestrenum.Weekday.Sat;
+import static org.junit.jupiter.api.Assertions.*;
+
+enum Weekday {
+    Mon("Monday"),
+    Tue("Tuesday"),
+    Wed("Wednesday"),
+    Thu("Thursday"),
+    Fri("Friday"),
+    Sat("Saturday");
+
+    private String fullName;
+
+    Weekday(String fullName) {
+        this.fullName = fullName;
+    }
+
+    public String getFullName() {
+        return fullName;
+    }
+
+
+    static Optional<Weekday> byFullNameIgnoreCase(String givenFullName) {
+        return Arrays.stream(values()).filter(it -> it.fullName.equalsIgnoreCase(givenFullName)).findAny();
+    }
+
+    static Optional<Weekday> byNameIgnoreCase(String givenName) {
+        return Arrays.stream(values()).filter(it -> it.name().equalsIgnoreCase(givenName)).findAny();
+    }
+}
+
+public class CompareStringAndEnumUnitTest {
+    private static final String SAT = "sAt";
+    private static final String SATURDAY = "sAtuRdAy";
+    private static final String TYPO_FRI = "ffri";
+    private static final String TYPO_FRIDAY = "ffriday";
+
+    @Test
+    void givenAString_whenCompareEnumWithName_thenGetExpectedResult() {
+        assertTrue(SAT.equalsIgnoreCase(Sat.name()));
+        assertFalse(TYPO_FRI.equalsIgnoreCase(Fri.name()));
+    }
+
+    @Test
+    void givenAString_whenCompareEnumWithProperty_thenGetExpectedResult() {
+        assertTrue(SATURDAY.equalsIgnoreCase(Sat.getFullName()));
+        assertFalse(TYPO_FRI.equalsIgnoreCase(Fri.getFullName()));
+    }
+
+    @Test
+    void givenAString_whenFindEnumByName_thenGetExpectedResult() {
+        Optional<Weekday> optResult = Weekday.byNameIgnoreCase(SAT);
+        assertTrue(optResult.isPresent());
+        assertEquals(Sat, optResult.get());
+
+        Optional<Weekday> optResult2 = Weekday.byNameIgnoreCase(TYPO_FRI);
+        assertFalse(optResult2.isPresent());
+    }
+
+    @Test
+    void givenAString_whenFindEnumByProperty_thenGetExpectedResult() {
+        Optional<Weekday> optResult = Weekday.byFullNameIgnoreCase(SATURDAY);
+        assertTrue(optResult.isPresent());
+        assertEquals(Sat, optResult.get());
+
+        Optional<Weekday> optResult2 = Weekday.byFullNameIgnoreCase(TYPO_FRIDAY);
+        assertFalse(optResult2.isPresent());
+    }
+
+}