wip adding docker run commands [ci skip]

engine/image_test.go

@@ -0,0 +1,56 @@
+// Copyright 2019 Drone.IO Inc. All rights reserved.
+// Use of this source code is governed by the Polyform License
+// that can be found in the LICENSE file.
+
+package engine
+
+import "testing"
+
+func TestParseImage(t *testing.T) {
+	tests := []struct {
+		image     string
+		canonical string
+		domain    string
+		latest    bool
+		err       bool
+	}{
+		{
+			image:     "golang",
+			canonical: "docker.io/library/golang:latest",
+			domain:    "docker.io",
+			latest:    true,
+		},
+		{
+			image:     "golang:1.11",
+			canonical: "docker.io/library/golang:1.11",
+			domain:    "docker.io",
+			latest:    false,
+		},
+		{
+			image: "",
+			err:   true,
+		},
+	}
+
+	for _, test := range tests {
+		canonical, domain, latest, err := parseImage(test.image)
+		if test.err {
+			if err == nil {
+				t.Errorf("Expect error parsing image %s", test.image)
+			}
+			continue
+		}
+		if err != nil {
+			t.Error(err)
+		}
+		if got, want := canonical, test.canonical; got != want {
+			t.Errorf("Want image %s, got %s", want, got)
+		}
+		if got, want := domain, test.domain; got != want {
+			t.Errorf("Want image domain %s, got %s", want, got)
+		}
+		if got, want := latest, test.latest; got != want {
+			t.Errorf("Want image latest %v, got %v", want, got)
+		}
+	}
+}