Add unit tests for AddBuildpackToLayersMD

Signed-off-by: Sambhav Kothari <skothari44@bloomberg.net>

Author: sambhav

internal/dist/dist_test.go

@@ -86,5 +86,18 @@ func testDist(t *testing.T, when spec.G, it spec.S) {
 				})
 			})
 		})
+		when("Add", func() {
+			when("a new buildpack is added", func() {
+				it("succeeds", func() {
+					layers := dist.BuildpackLayers{}
+					apiVersion, _ := api.NewVersion("0.0")
+					descriptor := dist.BuildpackDescriptor{API: apiVersion, Info: dist.BuildpackInfo{ID: "test", Name: "test", Version: "1.0"}}
+					dist.AddBuildpackToLayersMD(layers, descriptor, "")
+					layerInfo, ok := layers.Get(descriptor.Info.ID, descriptor.Info.Version)
+					h.AssertEq(t, ok, true)
+					h.AssertEq(t, layerInfo.Name, descriptor.Info.Name)
+				})
+			})
+		})
 	})
 }