test: added missing tests for pkg/analysis package (#908)

This commit bumps the code coverage of the `pkg/analysis` package to
60.8%

Signed-off-by: VaibhavMalik4187 <vaibhavmalik2018@gmail.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>
Co-authored-by: JuHyung Son <sonju0427@gmail.com>

pkg/analysis/output_test.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2024 The K8sGPT Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package analysis
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPrintOutput(t *testing.T) {
+	require.NotEmpty(t, getOutputFormats())
+
+	tests := []struct {
+		name           string
+		a              *Analysis
+		format         string
+		expectedOutput string
+		expectedErr    string
+	}{
+		{
+			name:           "json format",
+			a:              &Analysis{},
+			format:         "json",
+			expectedOutput: "{\n  \"provider\": \"\",\n  \"errors\": null,\n  \"status\": \"OK\",\n  \"problems\": 0,\n  \"results\": null\n}",
+		},
+		{
+			name:           "text format",
+			a:              &Analysis{},
+			format:         "text",
+			expectedOutput: "AI Provider: AI not used; --explain not set\n\nNo problems detected\n",
+		},
+		{
+			name:        "unsupported format",
+			a:           &Analysis{},
+			format:      "unsupported",
+			expectedErr: "unsupported output format: unsupported. Available format",
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			output, err := tt.a.PrintOutput(tt.format)
+			if tt.expectedErr == "" {
+				require.NoError(t, err)
+				require.Contains(t, string(output), tt.expectedOutput)
+			} else {
+				require.ErrorContains(t, err, tt.expectedErr)
+				require.Nil(t, output)
+			}
+		})
+	}
+}