(#451) Adjusted image tests to new interface

Author: s1hofmann

Diff for: lib/image.class.spec.ts

@@ -14,38 +14,46 @@ afterEach(() => {
 
 describe("Image class", () => {
   it("should return alphachannel = true for > 3 channels", () => {
-    const SUT = new Image(200, 200, Buffer.from([123]), 4, "id");
+    const SUT = new Image(200, 200, Buffer.from([123]), 4, "id", 4, 200 * 4);
     expect(SUT.hasAlphaChannel).toBeTruthy();
   });
 
   it("should return alphachannel = false for <= 3 channels", () => {
-    const SUT = new Image(200, 200, Buffer.from([123]), 3, "id");
+    const SUT = new Image(200, 200, Buffer.from([123]), 3, "id", 4, 200 * 4);
     expect(SUT.hasAlphaChannel).toBeFalsy();
   });
   it("should return alphachannel = false for <= 3 channels", () => {
-    const SUT = new Image(200, 200, Buffer.from([123]), 2, "id");
+    const SUT = new Image(200, 200, Buffer.from([123]), 2, "id", 4, 200 * 4);
     expect(SUT.hasAlphaChannel).toBeFalsy();
   });
   it("should return alphachannel = false for <= 3 channels", () => {
-    const SUT = new Image(200, 200, Buffer.from([123]), 1, "id");
+    const SUT = new Image(200, 200, Buffer.from([123]), 1, "id", 4, 200 * 4);
     expect(SUT.hasAlphaChannel).toBeFalsy();
   });
 
   it("should throw for <= 0 channels", () => {
-    expect(() => new Image(200, 200, Buffer.from([123]), 0, "id")).toThrowError(
-      "Channel <= 0"
-    );
+    expect(
+      () => new Image(200, 200, Buffer.from([123]), 0, "id", 4, 200 * 4)
+    ).toThrowError("Channel <= 0");
   });
 
   it("should have a default pixel density of 1.0", () => {
-    const SUT = new Image(200, 200, Buffer.from([123]), 1, "id");
+    const SUT = new Image(200, 200, Buffer.from([123]), 1, "id", 4, 200 * 4);
     expect(SUT.pixelDensity).toEqual({ scaleX: 1.0, scaleY: 1.0 });
   });
 
   describe("Colormode", () => {
     it("should not try to convert an image to BGR if it already has the correct color mode", async () => {
       // GIVEN
-      const bgrImage = new Image(100, 100, Buffer.from([]), 3, "testImage");
+      const bgrImage = new Image(
+        100,
+        100,
+        Buffer.from([]),
+        3,
+        "testImage",
+        4,
+        200 * 4
+      );
 
       // WHEN
       const convertedImage = await bgrImage.toBGR();
@@ -63,6 +71,8 @@ describe("Image class", () => {
         Buffer.from([]),
         3,
         "testImage",
+        4,
+        200 * 4,
         ColorMode.RGB
       );
 
@@ -78,7 +88,7 @@ describe("Image class", () => {
   describe("isImage typeguard", () => {
     it("should identify an Image", () => {
       // GIVEN
-      const img = new Image(100, 100, Buffer.from([]), 4, "foo");
+      const img = new Image(100, 100, Buffer.from([]), 4, "foo", 4, 200 * 4);
 
       // WHEN
       const result = isImage(img);