[API] Add arithmetic ops to ImVec2 and ImVec4

- plus
- minus
- times

imgui-binding/src/test/java/imgui/ImVec2Test.java

@@ -0,0 +1,100 @@
+package imgui;
+
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ImVec2Test {
+    @Nested
+    class constructor {
+        @Test
+        void raw() {
+            final ImVec2 value = new ImVec2();
+            assertEquals(0, value.x);
+            assertEquals(0, value.y);
+        }
+
+        @Test
+        void fromFloats() {
+            final ImVec2 value = new ImVec2(1, 2);
+            assertEquals(1, value.x);
+            assertEquals(2, value.y);
+        }
+
+        @Test
+        void fromImVec2() {
+            final ImVec2 value = new ImVec2(new ImVec2(1, 2));
+            assertEquals(1, value.x);
+            assertEquals(2, value.y);
+        }
+    }
+
+    @Nested
+    class set {
+        @Test
+        void withFloats() {
+            final ImVec2 value = new ImVec2().set(1, 2);
+            assertEquals(1, value.x);
+            assertEquals(2, value.y);
+        }
+
+        @Test
+        void withImVec2() {
+            final ImVec2 value = new ImVec2().set(new ImVec2(1, 2));
+            assertEquals(1, value.x);
+            assertEquals(2, value.y);
+        }
+    }
+
+    @Nested
+    class plus {
+        @Test
+        void withFloats() {
+            final ImVec2 value = new ImVec2(5, 5).plus(1, 2);
+            assertEquals(6, value.x);
+            assertEquals(7, value.y);
+        }
+
+        @Test
+        void withImVec2() {
+            final ImVec2 value = new ImVec2(5, 5).plus(new ImVec2(1, 2));
+            assertEquals(6, value.x);
+            assertEquals(7, value.y);
+        }
+    }
+
+    @Nested
+    class minus {
+        @Test
+        void withFloats() {
+            final ImVec2 value = new ImVec2(5, 5).minus(1, 2);
+            assertEquals(4, value.x);
+            assertEquals(3, value.y);
+        }
+
+        @Test
+        void withImVec2() {
+            final ImVec2 value = new ImVec2(5, 5).minus(new ImVec2(1, 2));
+            assertEquals(4, value.x);
+            assertEquals(3, value.y);
+        }
+    }
+
+    @Nested
+    class times {
+        @Test
+        void withFloats() {
+            final ImVec2 value = new ImVec2(5, 5).times(1, 2);
+            assertEquals(5, value.x);
+            assertEquals(10, value.y);
+        }
+
+        @Test
+        void withImVec2() {
+            final ImVec2 value = new ImVec2(5, 5).times(new ImVec2(1, 2));
+            assertEquals(5, value.x);
+            assertEquals(10, value.y);
+        }
+    }
+}