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package bjc.funcdata;
import static org.junit.Assert.*;
import java.util.*;
import org.junit.*;
@SuppressWarnings("javadoc")
public class TestMapOperations {
private MapEx<String, String> map;
@Before
public void setUp() throws Exception {
map = MapEx.of("a", "A", "b", "B");
}
@Test
public void sizeMatchesExpected() {
assertEquals("Constructed map is of size 2", 2, map.size());
}
@Test
public void containsExpectedKey() {
assertTrue("Constructed map contains key 'a'", map.containsKey("a"));
}
@Test
public void getYieldsExpectedValue() {
assertEquals("Constructed map has key 'a' mapped to value 'A'", "A", map.get("a").get());
}
@Test
public void doesNotContainNotAddedKey() {
assertFalse("Constructed map doesn't contain key 'c'", map.containsKey("c"));
}
public void getOfNonexistentKeyThrows() {
assertFalse("Getting a non-existant key yields an absent optional", map.get("c").isPresent());
}
@Test
public void putOfNonExistingKeyAddsValue() {
map.put("c", "C");
assertEquals("Constructed map now has 3 items", 3, map.size());
assertEquals("Constructed map now has 'c' mapped to 'C'", "C", map.get("c").get());
}
@Test
public void putOfExistingKeyUpdatesValue() {
String val = map.put("a", "D");
assertEquals("Constructed map still contains 2 items", 2, map.size());
assertEquals("Constructed map now has 'a' mapped to 'D'", "D", map.get("a").get());
assertEquals("put method returned old value of 'A'", "A", val);
}
@Test
public void forEachGetsExpectedElements() {
List<String> result = new ArrayList<>();
map.forEach((key, value) -> {
result.add(key + " = " + value);
});
assertArrayEquals("For-each has the expected elements",
new String[] {"a = A", "b = B"},
result.toArray());
}
@Test
public void forEachKeyGetsAddedKeys() {
List<String> keys = new ArrayList<>();
map.forEachKey((key) -> {
keys.add(key);
});
assertArrayEquals("forEachKey gives the expected keys",
new String[] {"a", "b"},
keys.toArray());
}
@Test
public void forEachValueGetsAddedValues() {
List<String> keys = new ArrayList<>();
map.forEachValue((key) -> {
keys.add(key);
});
assertArrayEquals("forEachKey gives the expected values",
new String[] {"A", "B"},
keys.toArray());
}
@Test
public void clearRemovesAllValues() {
map.clear();
assertEquals("A cleared map contains no items", 0, map.size());
}
@Test
public void removeOfExistingKeyRemovesKey() {
String removed = map.remove("a");
assertEquals("Constructed map now has one less element", 1, map.size());
assertFalse("Constructed map no longer contains a removed key", map.containsKey("a"));
assertEquals("Remove returns the removed value", "A", removed);
}
@Test
public void removeOfNonExistingKeyDoesntRemoveAnything() {
String removed = map.remove("c");
assertEquals("Constructed map still contains 2 elements", 2, map.size());
assertNull("remove of a non-existing key returns null", removed);
}
@Test
public void keyListReturnsListOfKeys() {
assertArrayEquals("Constructed map key-list has the expected elements",
new Object[] {"a", "b"},
map.keyList().toArray(new String[0]));
}
@Test
public void valueListReturnsListOfValues() {
assertArrayEquals("Constructed map value-list has the expected elements",
new Object[] {"A", "B"},
map.valueList().toArray(new String[0]));
}
@Test
public void mapIsThawedByDefault() {
assertFalse("isFrozen is false by default for a map", map.isFrozen());
}
@Test
public void canFreezeMap() {
assertTrue("canFreeze is true for a map", map.canFreeze());
assertTrue("freeze freezes a map", map.freeze());
assertTrue("isFrozen indicates a map is frozen", map.isFrozen());
}
@Test(expected = ObjectFrozen.class)
public void clearOfFrozenMapFails() {
map.freeze();
map.clear();
}
}
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