1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/java/bjc/funcdata/TestMapCreation.java b/src/test/java/bjc/funcdata/TestMapCreation.java
new file mode 100644
index 0000000..eeea591
--- /dev/null
+++ b/src/test/java/bjc/funcdata/TestMapCreation.java
@@ -0,0 +1,38 @@
+package bjc.funcdata;
+
+import static org.junit.Assert.*;
+
+import org.junit.*;
+
+@SuppressWarnings("javadoc")
+public class TestMapCreation {
+	@Test
+	public void mapOfNothingCreatesEmptyMap() {
+		MapEx<String, String> map = MapEx.of();
+		
+		assertEquals("Map is empty", 0, map.size());
+	}
+	
+	@Test(expected = IllegalArgumentException.class)
+	public void mapOfMismatchedCountErrors() {
+		@SuppressWarnings("unused")
+		MapEx<String, String> map = MapEx.of("thing1");
+	}
+	
+	@Test(expected = ClassCastException.class) 
+	public void mapOfMismatchedTypeErrors() {
+		MapEx<String, String> map = MapEx.of(1, 1.0);
+		
+		map.forEach((key, val) -> {
+			// An exception will be thrown here
+		});
+	}
+	
+	@Test
+	public void mapOfCreatesWithGivenContents() {
+		MapEx<String, String> map = MapEx.of("a", "A", "b", "B");
+		
+		assertTrue("Constructed map contains key 'a'", map.containsKey("a"));
+		assertEquals("Constructed map has key 'a' mapped to value 'A'", "A", map.get("a").get());
+	}
+}