Add json annotations for Suites

This lets us read Suites from the disk.

Per open-policy-agent#1446, we aren't doing Assertions for pre-alpha so I haven't added
those annotations yet.

Signed-off-by: Will Beason <willbeason@google.com>

pkg/gktest/read_suites_test.go

@@ -246,6 +246,60 @@ apiVersion: test.gatekeeper.sh/v1alpha1
 			want:    nil,
 			wantErr: ErrNotADirectory,
 		},
+		{
+			name:      "suite with test and cases",
+			target:    "test.yaml",
+			recursive: false,
+			fileSystem: fstest.MapFS{
+				"test.yaml": &fstest.MapFile{
+					Data: []byte(`
+kind: Suite
+apiVersion: test.gatekeeper.sh/v1alpha1
+tests:
+- template: template.yaml
+  constraint: constraint.yaml
+  cases:
+  - allow: allow.yaml
+  - deny: deny.yaml
+`),
+				},
+			},
+			want: []Suite{{
+				Tests: []Test{{
+					Template:   "template.yaml",
+					Constraint: "constraint.yaml",
+					Cases: []Case{{
+						Allow: "allow.yaml",
+					}, {
+						Deny: "deny.yaml",
+					}},
+				}},
+			}},
+			wantErr: nil,
+		},
+		{
+			name:      "suite with tests and no cases",
+			target:    "test.yaml",
+			recursive: false,
+			fileSystem: fstest.MapFS{
+				"test.yaml": &fstest.MapFile{
+					Data: []byte(`
+kind: Suite
+apiVersion: test.gatekeeper.sh/v1alpha1
+tests:
+- template: template.yaml
+  constraint: constraint.yaml
+`),
+				},
+			},
+			want: []Suite{{
+				Tests: []Test{{
+					Template:   "template.yaml",
+					Constraint: "constraint.yaml",
+				}},
+			}},
+			wantErr: nil,
+		},
 	}
 
 	for _, tc := range testCases {

pkg/gktest/suite.go

@@ -10,28 +10,28 @@ type Suite struct {
 
 	// Tests is a list of Template&Constraint pairs, with tests to run on
 	// each.
-	Tests []Test
+	Tests []Test `json:"spec"`
 }
 
 // Test defines a Template&Constraint pair to instantiate, and Cases to
 // run on the instantiated Constraint.
 type Test struct {
 	// Template is the path to the ConstraintTemplate, relative to the file
 	// defining the Suite.
-	Template string
+	Template string `json:"template"`
 
 	// Constraint is the path to the Constraint, relative to the file defining
 	// the Suite. Must be an instance of Template.
-	Constraint string
+	Constraint string `json:"constraint"`
 
 	// Cases are the test cases to run on the instantiated Constraint.
-	Cases []Case
+	Cases []Case `json:"cases"`
 }
 
 // Case runs Constraint against a YAML object.
 type Case struct {
-	Allow      string
-	Deny       string
+	Allow      string `json:"allow"`
+	Deny       string `json:"deny"`
 	Assertions []Assertion
 }